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00:01
2
Q: MPL for core C++ and MIT for python interface and others: is this sound?

orematasaburoI'm developing a high-performance algorithm library for robotics applications. The implementation consists of C++ core algorithms with Python bindings and YAML configuration support. My objective is twofold: enabling commercial adoption while fostering contributions for algorithm optimization and...

00:25
1
Q: Why is x[] not a variable?

მამუკა ჯიბლაძეVariables[x[0]] returns {x[0]} and Variables[x[k]] returns {x[k]}, but Variables[x[]] returns {}. I want equations involving x[], and I want them to treat x[] as a variable, is there a way?

2
Q: Can you omit から directly connecting plain forms?

Mr. FeynmanDuring a conversation with a native, I used the following sentence 試験があるから1月の第3週を待っています。 To mean "Since there is an exam, I'm waiting for the 3rd week of January". My sentence was corrected to 試験がある 1月の第3週を待っています。 Which, according to the other person, sounds more natural. Now, I'm bewildered ...

00:45
1
Q: Why is the term "card" used in "expansion card"?

TimI'm curious about the historical origin of the use of the word "card" in "expansion card." "Expansion board" makes sense, given it's a PCB, and a PCB is a board (of fibreglass for example). But "card" seems a bit esoteric. Did this terminology originate from the physical resemblance to punch card...

9
Q: Time Travel Short Story: Someone travels back in time to the start of the 18th or 19th Century. The naming of the Genre

Seldon2kThe time traveller is confused and disoriented and meets a man in a park. He babbles about the future and says "parts of this may sound like Science-Fiction". This is the only bit of the conversation the other man hears clearly and after the time traveller returns to the future he wanders off mut...

01:08
1
Q: Why does "not" stand after "it" in "he knows it not"?

MikeI'm a layman in linguistics, and English is not my first language. I would like to know a little more about negation. Following my curiosity, I was looking for an example of negation where "not" stands neither directly after the auxiliary verb, as it commonly does nowadays ("I do not know"), nor ...

2
Q: The usage of Select for list (deep level)

raniI want to select the data which the third value of sublist is below certain value. So I tried to use Select function as below, but I'm struggling how to apply it to the deep level of the list. part = Partition[RandomReal[10, 1500], 3]; threedata = {{part[[1 ;; 3]], part[[4 ;; 5]], part[[11 ;; 16...

01:32
1
Q: driver "self['prop']" not working in 4.2.2?

james_tI want to reference a "current object" custom property in a shader node driver via a scripted self["Custom Property"]. I have tried the solution provided in this answer in my 4.2.2 app (turn on "Auto Run Python Scripts" but I still get an error: Error in PyDriver: expression failed: self["Emissi...

CS
CS
02:14
3
Q: How does the Born rule arise in the many-worlds interpretation with only two worlds?

DavidI’m struggling to understand how probabilities other than strictly 50/50 can arise in the Many-Worlds Interpretation (MWI) of quantum mechanics when the wavefunction appears to split into exactly two worlds during measurement. For example, consider measuring the spin of an electron in the state $...

DIY
DIY
1
Q: Electric dryer - Venting Clothes Lint to a Bucket?

abdullahalaliso basically my Electric Dryer is in an awkward place in my house and I'm not in a position to drill through walls for an outdoor vent. Can a bucket like this be a solution (at least temporary) to vent clothes lint? how do i prevent fire hazard? what about Humidity?

02:37
2
Q: In AES GCM, would using different nonces that are close reveal data?

aryzingStarting from a known nonce, AES GCM uses a counter to sequentially generate new numbers that are the input to the encryption function. If by chance two nonces from two distinct runs of AES GCM were close enough together such that their counters overlapped, how much of a risk to the plaintext mes...

03:01
1
Q: point a domain name to a vm with internal IP

Planet Smart SolutionsI have windows server 2022 with hyper-v installed. I created a virtual machine with windows server 2022 OS also installed plesk control panel. The virtual machine has an internal IP not a public one, the internal IP is: 192.168.0.100. I need to point a domain name (e.g. domain.com) to the Virtual...

1
Q: What are Christian responses to Carlo Alvaro's argument against Christian theism?

Chess IceShort version I'm specifically referring to Carlo Alvaro's paper The “Heaven Ab Initio” Argument from Evil. In it he argues against Christian conception of God: Abstract Logical and evidential arguments from evil are generally thought to have been rebutted by various refutations, defenses, and t...

2
Q: Connectedness of complement of intersection of two balls

curiosityLet $B_r(x_0)\subset \mathcal{R}^n$ be an open ball with radious $r>0$ and centered at $x_0$. Let $y_0\in \partial \overline{B}_r(x_0)$. I want to argue: there exists some $\delta>0$ such that both $B_\delta(y_0)\cap B_r(x_0)$ and $B_\delta(y_0)\setminus B_r(x_0)$ are connected. Is the statement...

03:25
1
Q: Issue with CompoundShape Scaling in BulletSharp/Assimp Integration

Wagner AndreasI’m trying to create a CompoundShape using BulletSharp and Assimp for my 3D physics engine. The collider works perfectly when the scaling is uniform across all axes (e.g., 1,1,1 or 2,2,2). However, when I apply non-uniform scaling (e.g., 1,2,1), the collider behaves incorrectly. Here is the relev...

04:07
1
Q: Does Russel's Paradox apply to predicate logic also?

AnoEIn short, Russel's Paradox for Naive Set Theory (i.e., the fact that the question of whether "the set containing all sets that do not contain themselves" contains itself leads to a contradiction) inspired people to develop formal set theories like ZF(C). Is predicate logic or first-order logic al...

5
Q: Please explain the end of Tosefta Eduyot

rikitikitemboAt the end of Tosefta Eduyot 3:4 it states: One who has students, they call him rabbi. When his students were forgotten, they called him rabban. When both of these are forgotten, they call him by his name. What does this mean? There are many examples of Rabbis with the appellation Raban (such a...

22
Q: PSE Advent Calendar 2024 (Day 1): A Snowy Christmas

Lukas RotterThis puzzle is part of the Puzzling Stack Exchange Advent Calendar 2024. The accepted answer to this question will be awarded a bounty worth 200 reputation.Next Door > What is hidden here? A complete answer will explain the snowflakes' appearances, their positioning and the final result.

04:29
2
Q: Number of roots of a quadratic form over GF2

Fabio DiasIf $Q(x) = x^T A x$ with $x \in GF(2)^n$ and $A \in GF(2)^{n \times n}$ is there a way to find how many roots $Q(x)$ has based on any properties or $A$ (eg rank, etc)?

2
Q: Regressions in potty-training

cecilian - MonicaWasMistreatedThis summer we went through potty-training with our daughter (26 months at the time). I had the feeling it was still a bit early for her (she wasn't showing much interest) but decided to do it anyway because it was a moment where I could be close to her and give her a lot of care and attention. S...

1
Q: Simple successor gate

ThePirate42I want to create a gate that, given a sequence of qbits that encode n, transforms that sequence in n+1, in other words the successor function. I managed to do it in qiskit by writing this: def plus_one(qubit_number : int): circuit = QuantumCircuit(qubit_number, name="plus_one") for q in r...

ELL
ELL
04:51
1
Q: What's the purpose of "also" here?

Julian JacksonIn Loving Vincent (2017), Dr. Gachet's sheltered daughter, Marguerite meets postman Joseph Roulin's son Armand in a farm: Marguerite: If it isn't the Provence pugilist. Should I be scared? Armand: I thought you didn't go in for village gossip. Marguerite: I don't. That's why one employs servants...

1
Q: How to test a programmer's ability to handle a large code base?

JohnHernandezI would like to get advice regarding job interviews for hiring software developers. A couple of years ago, our company hired a software developer. One of the shortlisted candidates was clearly above the others - or at least so we thought. This senior programmer was able to answer impeccably all t...

DSP
DSP
1
Q: z transform for low pass filter

PeteI recently asked a question about z transform for a high pass filter and in the process decided that I may have got the wrong derivation for the low pass filter. Please let me know if this derivation is good and if not supply suitable hits about how to improve it! First from an earlier post abou...

1
Q: Co-author on papers after leaving academia

Mickey MouseI used to do research at a major research institution and recently left academia to pursue a corporate job in a pharma company. I helped with some data collection and analysis for a study while in my previous role, but now, a lot of papers using that data are finally being published. Since I am c...

 
1 hour later…
06:02
4
Q: Why does differentiation with respect to time commute with the Fourier Transform?

Mashe BurnedeadIn Stein and Shakarchi's Fourier Analysis, they often invoke the fact that differentiation with respect to time commutes with the Fourier transform with respect to space variables. For example, on page 147 (Chapter 5, Proof of Theorem 2.1(i)), they show that $u(x, t) = \int_{-\infty}^{\infty} \h...

06:21
6
Q: Has anyone proven the Principle of Sufficient Reason?

Mark AndrewsThe Principle of Sufficient Reason is simply stated: “For every fact F, there must be an explanation why F is the case” (Melamed and Lin 2016, §1). The principle is most closely associated with Gottfried Wilhelm Leibniz (Melamed and Lin 2016, §3), although forms of the principle first appeared in...

06:43
1
Q: How can I use a terminal emulator as an efficient application launcher?

chedieckThe Problem I've used various application launchers like rofi, albert, wofi, dmenu, and others throughout my Linux years. While they have their pros and cons, one thing has always bothered me: they're not a bash shell. Why does this matter? I really enjoy some of the bash's features, such as: GN...

ELL
ELL
07:06
1
Q: Is 'I screamed that she get out of there' the correct way to report 'Get out of there, I screamed'

QuiqueI am having some trouble using and understanding the subjunctive in English so I am in doubt regarding the correct way to use the reported speech for the next sentence Get out of there, I screamed. I wouldn't use 'gets' as it would render the sentence into the indicative I wouldn't use 'got' as p...

3
Q: How a person become a rabbi around 1 CE?

Candid MoeGiven the general illiteracy, the lack of public libraries, the high cost of Torah copies and writing materials, how a person becomes a rabbi in 1 CE? Given the costs and reading/writing requisites it looks like it's a path only for sons of well-off families, living in a major city. I have read I...

07:31
3
Q: Total derivative of a vector field as experienced by a moving particle

AlbertoConsider a region of 3D space where there exists a continuous and differentiable vector field: $$ \vec{A}=\left[A_1(x,y,z,t),A_2(x,y,z,t),A_3(x,y,z,t)\right] $$ In that region of space there is a particle moving with velocity: $$ \vec{v}=\left[v_1(x,y,z,t),v_2(x,y,z,t),v_3(x,y,z,t)\right] $$ My q...

07:54
1
Q: Use of pronoun "en" referring to the subject rather than indirect object

user118967On a recent episode of "Inner French", the host Hugo says: Je vais tout simplement vous raconter ma vie, ce qui s’est passé dans ma vie pendant ces derniers mois, parce que je sais que ça en intéresse certains d’entre vous. Why did he use the pronoun "en" before "intéresse" in this paragraph? I...

CS
CS
08:13
1
Q: Calculating the wattage of a speaker protection light bulb

JakeeleeI have a very old musician's singing system in my hobby room. Yesterday one of the speakers broke down. In search of the cause, I finally opened the speaker box and found two light bulbs inside. One of them had burned out. They are probably used as overload protection. Unfortunately, the label on...

08:36
2
Q: How to attribute which parts of the code are authored by someone else?

mohamadi_archI have borrowed some lines of code (suppose just 20 lines of a function) from a GitHub repository that is licensed under the MIT License. I plan to use these lines in my personal project. Is it sufficient to add a comment in my code with the original author's name and the license (like this: //Th...

CS
CS
08:58
1
Q: PROS & CONS of Sallen-Key vs. double RC cascaded stages LPF topologies

GuilleHere are 2 possible topologies to implement an active non inverting 2nd order LPF, namely Sallen Key and 2 cascaded RC stages. Both circuits have the same transfer function: So theoretically they are equivalent. However, I am sure that there are also practical considerations that may render on...

2
Q: Is this basic string encryption in PHP secure?

mpenI need to encrypt and decrypt some passwords in PHP. Normally I would hash them, but I need to be able to decrypt them again because they're keys for an external service. I googled around a bit, but the examples I found seem a little bit incomplete, so I cobbled this together from what I could fi...

09:20
2
Q: Design and performance of Bi-Planar Rotors or Propellers

GerryI have been doing a bit of a deep dive on coaxial rotors and propellers recently and ended up reading into the NASA Puffin vtol concept. I found out that it was supposed to have a "bi-planar" rotor, that is to say two sets of blades rotating in two planes, and rotating in the same direction. (IE:...

1
Q: Is Christianity compatible with Objective Bayesian Epistemology?

user80226From Bayesian epistemology (SEP): Bayesian Epistemology First published Mon Jun 13, 2022 We can think of belief as an all-or-nothing affair. For example, I believe that I am alive, and I don’t believe that I am a historian of the Mongol Empire. However, often we want to make distinctions between...

09:43
2
Q: What are the works built on the foundation of Christ in 1 Corinthians 3:12–15?

Perry WebbThe terms "gold, silver, precious stones, wood, hay, straw" are obviously symbolic of works built on the foundation of Christ. What works survive the fire and what works burn up? Do the Scripture identify these (can be answered), or can it only be based on opinion (no valid answer for here)?

1
Q: Could rocket exhaust eventually lead to detrimental effects from interplanetary space pollution?

Alex AbramovI am interested in if the exhaust from a rocket would lead to space pollution like space junk does. Particularly, I am talking about the exhaust that stays in interplanetary orbit and does not return to our atmosphere. When a rocket ejects its propellent, wouldn't some of it stay in interplanetar...

10:08
3
Q: Is it (always) better to build a model prior to viewing the data?

NateWhen it comes to data exploration, aside from checking for outliers (human error), correlated covariates, and missing values, is there a downside to viewing relationships between a response variable and candidate covariates before building a statistical model? I've heard it's better to construct ...

10
Q: PSE Advent Calendar 2024 (Day 2): Roleplaying Reindeer

bobbleThis puzzle is part of the Puzzling Stack Exchange Advent Calendar 2024. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door > Santa’s reindeer got bored waiting for Christmas. They decided to try roleplaying. Each chose characters as close ...

10:51
1
Q: What does pure liquids and pure solids mean in chemical equilibrium, why active mass of pure liquids is also zero?

Madara UchihaBackground The professor who taught us chemical equilibrium defined active mass as: $$\mathrm{[activity~coefficient (\lambda)×[conc]~or~ [Partial~Pressure]}$$ and mentioned that, for the scope of our course, $\lambda=1$. Questions 1. What do "pure solids" and "pure liquids" mean in this context? ...

2
Q: Multiple 90-day visits on visa free waiver to the US. Future problems?

Hyunwoo LeeI am reaching out with a question regarding visa-free entry to the United States as a South Korean passport holder. I have visited the U.S. on four occasions as a tourist under the Visa Waiver Program, staying for the full 90-day allowance each time without overstaying. During my previous visits,...

CS
CS
11:12
3
Q: Are Li-ion drone batteries chemically and electronically similar to cellphone Li-ion batteries?

AubergoneI have an old Huawei E5372 Mobile Hotspot with a removable battery. I'm thinking of buying another battery so I could simply swap batteries before they run low. Basically, I'd be charging one battery while I use the other. The problem with such a scheme is that the only charger available for the ...

11:35
2
Q: Criticisms of "reductio ad absurdum" argumentation?

GeremiaEd Feser, Immortal Souls, pt. 3 ch. 8 says: […] reductio ad absurdum arguments, the probative force of which is generally acknowledged. Which philosophers/logicians do not recognize "the probative force of" "reductio ad absurdum arguments"? What reasons do they give?

3
Q: Why do you want a taut surface on dough?

KingsleyOften advice for processing dough is to mix, knead, and then ball up the dough. The general advice (that I've read) seems to be to push up from the bottom of a ball, making a taut smooth surface on the top, and then pinch it closed on the bottom. I think of it as "jelly fishing" the dough ball. ...

TeX
TeX
2
Q: How to calibrate fancy headers?

AtexI was inspired by this example to try and make some advanced headers using tikz. I attempted to construct a simple example in order to understand how it all works together and managed to create this: The problem is that the header doesn't extend across the entire page like the example, and I've ...

12:00
2
Q: Swapping left and right hand sides of an equation

SoonMy goal is to get the rule t->(v[t]-v[0])/a from equation v[t]==a t+v[0]. During the process, I come to change the left and right sides, so I wonder if there is a function or neat way that can do this. (There are *Sides functions in the documentation and I think there might be a function or simil...

DIY
DIY
12:20
1
Q: Crawl Space Insulation

Paul CastonguayI have a home built in 1912 that I have been trying to find solutions to keeping the first floor warm in the winter for a few years. Heating for that floor is from forced air hear pump with ceiling vents and a recently installed gas fireplace insert. The main issue is how cold the floors get as ...

12:42
5
Q: Is there just one Zero?

Ashish ShuklaOnce i was discussing Zero with my kids, i picked up a pen and asked what it is they said 1 pen, then i kept the pen and showed them empty hand and asked how about now, they said Zero pen, then I picked up notebook, did the same, 1 notebook, Zero notebook, pencil etc. Then one of the kids remarke...

2
Q: Can a thunderstorm affect a satellite in low earth orbit?

Abdul Moiz QureshiClouds build up strong static electric charges. Magnetism is an emergent phenomenon of the length contraction of electric fields. Due to the strength of EM interaction, even very slow movement can result in strong magnetic fields, such as that caused by electrons moving at drift speed through the...

1
Q: How to set up a local VPN-connected environment with a public IP address?

LuckyCoder3607I’m trying to achieve a setup where my local machine functions like a VPS with a public IP address. The idea is to use a service that provides an OpenVPN (or similar) configuration file, which I can use to connect my local machine to their network. Once connected, I’d like my machine to have a pu...

13:28
1
Q: How do I hover in the Tails mech?

StevoisiakOn stage 7 (Mission Street) of the Hero Story of Sonic Adventure 2, you play as Tails in a mech. I keep dying on the stage because there are jumps that seem too long for me to make. When I look at videos of the stage, I see they have a hover move to get across. I've tried holding the jump button ...

ELL
ELL
13:49
1
Q: Why "as well" is used here?

Rain(NIT: I'm reading a sentence from a computer science book pdf.) I'm confused by the following sentence when the phrase "as well" appears: Of the eight states in Fig. 2.13, starting in the start state B, we can only reach states B, E, and F. The other five states are inaccessible from the start s...

2
Q: What is the command to clear an entire line in Linux using Super + Backspace, like on Mac with Command (hold) + Backspace (tap)?

DushmantaI’m looking to create a custom shortcut in Linux (I'm using Ubuntu 24.04) to clear an entire line using Super + Backspace, similar to how it works on Mac with Command (hold) + Backspace (tap). My goal is to clear the entire line with just a few keys, making the process quick and efficient.

1
Q: Can Trump reverse President Joe Biden's pardon for his son?

sfxeditNews reports say that Joe Biden has signed a "full and unconditional" pardon for his son, who was facing some Federal crime charges and conviction: Hunter Biden was scheduled to be sentenced on Dec. 12 for his conviction on federal gun charges. He also was set to be sentenced on Dec. 16 in a sep...

2
Q: Why do they add 'la' before 'Señora Ramos'?

user67275I was asked to translate the sentence He has a business with Mrs. Ramos. into Spansh. I wrote Él tiene un negocio con Señora Ramos. but I failed, and the write answer was Él tiene un negocio con la Señora Ramos. I don't understand why there should be 'la' ahead of 'Señora Ramos'.

CS
CS
14:12
3
Q: Is it possible to make a light follow a non-geodesic path?

weeab00I just stumbled upon this question. For massive particles like an electron, it is easy to make them follow a non-geodesic path by applying an external force. In case of the electron, one can put it under some electric field so it undergoes accelerated motion. I wonder if it is possible to make ma...

2
Q: Example of non homogenous manifold with a finitely generated algebra of natural functions

AmrLet $(M,g)$ be a Riemannian manifold. Let $C^{\infty}_{Nat}(M,g)$ be the $\mathbb{R}$-algebra of scalar invariants of the curvature tensor and all its higher covariant derivatives. An example of a member of $C^{\infty}_{Nat}(M,g)$ is: $$\sum_{i,j,b,k,c,d,f=1}^nR(e_i,e_j,e_j,e_k)\nabla R(e_k,e_b,e...

TeX
TeX
14:37
1
Q: How can I auto scale fonts imported from mathabx?

MasumRecently I asked this question and with the help of some comments, I was able to somehow find an answer. But as you can see in my answer, I could not make the summation symbol automatically scale based on whether it's inline or display style (so it can be considered a MWE). I would like to know t...

ELL
ELL
14:57
1
Q: while he was watching the game

azza. I was writing a letter for an hour while he was watching the game. b. I was writing a letter for an hour**,** while he was watching the game. Does the comma change the meaning? In which case he was watching the game for an hour? In which case he was watching the game for longer? In which case ...

2
Q: How do I find the luminosity of a star as it evolves through its entire lifetime

Sayon MearesI am really confused on how to estimate the luminosity of a made-up star through its lifetime, like say a star with the mass of 0.902 suns, how would I find the luminosity of it say, 6.5 billion years into its life? Or when it's in its red giant phase? What's the max luminosity it will reach in b...

TeX
TeX
15:22
2
Q: How can I left-align text in substack from amsmath?

JasperHow can I left-align text in substack from amsmath? If it isn't built for this, is there a command which is? This answer suggests that a tabular might work, but I don't know enough about fonts to do it myself: https://tex.stackexchange.com/a/728947/319072 I will study it in the mean time. \docume...

CS
CS
16:04
2
Q: 555 timer sinewave generation

Artur DatyI was trying to build a sinewave generator with NE555 IC, using these schematics I found at: Learning about Electronics - How to Build a Sine Wave Generator with a 555 Timer Chip But the output seen on my scope is nowhere near a sinewave: CH2: After inductor CH3: Vin CH4: Before inductor I have...

2
Q: What are the risks of running an old Minecraft Server version?

SaroyI need to install Minecraft Server 1.19.2 on my VPS, but there are no download links to previous versions on the Minecraft website. Looking for the server file needed, I've found this guide with links to official download pages captured by Internet Archive, and there, almost all versions can be f...

CS
CS
16:49
1
Q: Reducing circuit to only using one transistor to turn on relay and LED

CarlI currently have a circuit that controls the state of a relay. The relay is driven by an NMOS transistor M1, and the gate of the NMOS is driven by a microcontroller. Additionally, I have an LED indicating the state of the relay, and this LED is also controlled by an NMOS M2. The circuit looks lik...

RPG
RPG
5
Q: Do wizards add three free spells to their spellbook at third level when they choose their subclass, or only two?

wzbillingsAll of the wizard subclasses in the 2024 PHB have an feature called "[Spell School] Savant" which gives them two free spells in their spellbook from the school they chose to focus on, represented by their subclass. In addition, the features say whenever you gain access to a new level of spell sl...

2
Q: Question on distributions and topology

B.HueberLet $X$ and $Y$ be two topological spaces and $f:X\to Y$ a function. It is well-known that continuity of $f$ implies sequentially continuity, while the reverse is in general only true if $X$ is first countable. Now, if $U\subset\mathbb{R}^{d}$ is some open set, then one defines the space of test ...

CS
CS
17:11
3
Q: Limits of the integral for the calculation of work

physicopathTo calculate the total displacement for a time dependent velocity, one can start from an infinitesimal displacement and integrate as follows $$dx=vdt$$ $$ \int_{x_i}^{x_f}dx= \int_{t_i}^{t_f}vdt $$ $$ x_f-x_i=\Delta x=\int_{t_i}^{t_f}vdt $$ My question is when we do the same thing for the calcula...

2
Q: How do you know if this tire's patch is perfectly done?

The OneHow do you know if patch in the tyre hole is a good one? What are we need to check? This is good as new? Tyre is good as where there is no puncture before it? Thanks!

6
Q: Are there any tests for knowing whether a topological space admits a CW structure?

TyrannosaurusWe know that for n $\ge$ 5, a manifold admits a piecewise linear structure if and only if its Kirby-Siebenmann class vanish and Galewski and Stern showed the existence of a similar invariant to test for the existence of a triangulation whenever n $\ge$ 5 . So is there a similar invariant to detec...

1
Q: Is there a philosophical/non-logical version of the principle of bivalence?

logiclearnerI have seen philosophical versions of the principles of excluded middle and non-contradiction, which I guess were first formulated by Aristotle. Things like "A thing cannot possess and not possess a certain property at the same time" (non-contradiction) and "A thing must either possess a certain ...

1
Q: Transit flights for two Schengen countries

Arayik HovhannisyanI have a Lithuanian tourism Schengen visa and I'm flying from Yerevan to Vilnius, but there are no direct flights, so I should fly to Vienna and from there to Vilnius. But this way Vienna entrance stamp will be in passport and stamp of Vilnius entrance won't be visible as Schengen flights don't r...

17:37
1
Q: Two sided plane geometry

AviWhen adding a simple plane to the scene, then export it to any file format (fbx, glb, etc), naturally, it will create 2 triangles, which will be consist of 4 unique vertexes, and 6 unique vertex indexes. Since most engines/apps do back(or front) face culling, then plane will not be visible from t...

2
Q: Maximum value of Friedman's randomized block statistic

jvklocI'm reading about Friedman's statistic from the 3rd edition of Nonparametric Statistical Methods (Hollander, Wolfe $ Chicken). On page 302 they have an exercise problem: Show directly, or illustrate by means of an example, that the maximum value of $S$ is $S_{\text{max}} = n ( k − 1 )$ . For wha...

2
Q: jq - is using split() and sub() from current key to append new keys to docuemnt the best approach?

David C. RankinI have been working with the systemd journal entries regarding failed auth attempts creating a database of failures. An example of the captured document is: $ head -n1 comm-auth-nov-15-30.json | jq . { "_BOOT_ID": "87cfcd6210da469f9dbeae43377da8b8", "_SYSTEMD_UNIT": "dovecot.service", "_SYS...

1
Q: Question about discrete topology and the use of union and intersection to obtain singleton.

TanI currently reading Topology without tears by Sidney A. Morris and I encountered a question about discrete topology: Let $X$ be an infinite space and $T$ a topology on $X$. If every infinite subset of $X$ is in $T$, prove that $T$ is the discrete topology. Clearly we have to show that every sin...

17:58
1
Q: Use debs from the ubutu pro subscription to the unsubscribed machine

Swapnil MoreI want to check is it going to be licensing breach if I copy the deb files which are from the Ubuntu pro licensed machine and install it on another machine where license is not activated. I want to minimize the network utilization in my home lab by hosting the deb file locally.

18:19
2
Q: Kirby diagram of the complement of a subhandlebody of a smooth closed 4-manifold

blancketLet $X$ be a smooth closed connected 4-manifold. It admits a handlebody structure, having a unique 0- and a unique 4-handle. We can express the handlebody structure as a Kirby diagram (https://en.wikipedia.org/wiki/Kirby_calculus). Suppose $Y$ is a subhandlebody of $X$, which contains the 0-handl...

4
Q: Space colonization book, first published in 1950s or 1960s, where people of Earth are being "drafted" to colonize other planets

Rod ZimmermanPeople of Earth are being "drafted" to colonize other planets. A male volunteer gets the first choice of a single woman. He chooses an "experienced" female. An innocent young lady goes to a young man. Eventually, they switch places.

1
Q: Series about people who get infected with worms

DylanAround 2015 I was on vacation and I watched a series on television. Unfortunately I only could see the first view episodes of the (mini)series. The series was about a plane that landed on a airport but the people on the plane all died so a big investigation was started, but after a while the peop...

GIS
GIS
18:43
1
Q: QGIS : Want to create "polygons with hole" instead of "overlaping polygons" when use of "contour tool"

A. JeanQGIS 3.40 - I used the 'Contours' tool from a Raster; this generates polylines. I convert these polylines into polygons using the 'Lines to Polygons' tool. The generated polygons overlap, and I want the 'small interior polygons' to punch holes in the 'large exterior polygons' to create 'hole-punc...

CS
CS
19:04
1
Q: Is this a common mode choke

JulienI have this DC/DC converter. Can you confirm that the choke on the output visible on the picture is a common mode choke? If yes, my readings and understanding on common mode current is that it exists because there is a return pass for it generally earth. As this system is not connected to earth a...

GIS
GIS
19:51
1
Q: Setting min and max values for gradient of vector layer style larger than the layer's data in QGIS

FilippoI am working on a project with climate projections data. I need to keep the same layer style for different layers, in order to allow the comparison in increase or decrease of the variables' values (mean temperature, precipitation, etc). Simplified example: Vector layer 1: mean temperature increa...

2
Q: "Base" set in mathematical induction

Nyx ArtemisI am reading Naive Set Theory by Paul Halmos and trying to solve the exercise: Prove that the union of a finite set of finite sets is finite. Here's my attempt at the proof: Let $S$ be the set of all natural numbers $n$ such that for any set $N$ of finite sets such that $\#(N) = n$, the union of ...

20:13
3
Q: Somekhos's opinion "money which is in dispute - is to be split" vs Beit Shammai

EzrielSWe know that Somekhos holds that (Baba Kamma 5:1 - Gmara ad loc): ממון המוטל בספק חולקין Property of uncertain ownership is divided by the two parties However, in Baba Batra 9:8: נָפַל הַבַּיִת עָלָיו וְעַל אָבִיו אוֹ עָלָיו וְעַל מוֹרִישָׁיו, וְהָיְתָה עָלָיו כְּתֻבַּת אִשָּׁה וּבַעַל חוֹב,...

20:34
7
Q: How to set/force EXE stack size with 1988 Turbo C 2.0 for a reverse engineering project

llmI am trying to reconstruct C source of a Turbo C 2.0 DOS small-memory-model executable as exactly as possible from disassembly (it’s a DOS reverse-engineering project and I’m using IDA Pro for disassembly, UASM for re-assembly and Turbo C 2.x for the C source reconstruction) My first step was to ...

7
Q: Trying to find a story about humanity going infertile

theblitzI'm trying to find a story about humanity starting to go infertile. The premise of the story was that human sperm contained within it another human, which contained another and so on. It has now reached the point where there were no more "included" an so it was the last level. Scientists were wor...

2
Q: Have you it there?

PhilippIn the Sherlock Holmes short story The Adventure of Wisteria Lodge (1908) Watson asks Holmes about a telegram: Have you it there? And I vaguely remember similar constructions in other Sherlock Holmes stories, but can’t find them right now. This has always struck me as odd: I would expect a ques...

20:56
8
Q: Are key theorems finitistically reducible?

Mikhail KatzSimpson writes on page 378 of his Subsystems of Second Order Arithmetic: "For example, all of the following key theorems of infinitistic mathematics are provable in WKL$_0$ and therefore, by theorem IX.3.16, reducible to finitism. (1) The Heine/Borel covering theorem for closed bounded subsets of...

TeX
TeX
2
Q: How to change the size of the text under min and arg min commands?

David KrellWe are looking at the following MWE: \documentclass{article} \usepackage{optidef} \DeclareMathOperator*{\argminA}{arg\,min} \begin{document} $$n\in\argminA_{j\in\{C, D\}}{\min_{v\in \{A, B\}} w(j,v)}$$ \end{document} This produces the following: How can I achieve that the fontsize below...

CS
CS
21:19
2
Q: When did the concept that God allows time before judging someone for his/ her sins take root in pre-Messianic era?

Kadalikatt Joseph SibichanWe read in Wisdom of Solomon 21:23: But you are merciful to all, for you can do all things, and you overlook people’s sins, so that they may repent. Numbers 21:4-6 describes how snakes bite to death those people who rebelled against God and Moses. In fact, there was quick action on Israel's col...

1
Q: Can I play different audios to different external monitors, at the same time?

Pine CodeI have a MacBook Pro 13" mid-2015, which has an HDMI port and two Thunderbolt 2 ports. If I connect two external monitors, one via HDMI and the other one via Thunderbolt 2, and those monitors have speakers, can I play different video and sounds on each of them at the same time, using the extended...

3
Q: SIS decision letter interpretation

FgsI made an inquiry in the Finnish SIS to see if there are any alerts on me in the SIS database and I received a very ambiguous response hopefully someone here can help me interpret It says National police board states that no information about you in the Finnish SIS for which you could use your r...

21:45
4
Q: An ordinary Sunday night riddle

BenthegeolologistThree graves open with no tears And in crouch three soldiers Not in a row but paired and solo Where they go, they go low They brace, they flex They do their duty and relax

22:04
2
Q: The max-clique chromatic number of a graph

Dominic van der ZypenLet $G = (V,E)$ be a graph. Every clique, that is, complete subgraph, is contained in a maximal clique with respect to $\subseteq$ (this is an easy consequence of Zorn's Lemma). Let $\newcommand{\MC}{\text{MaxCliq}(G)}\MC$ denote the collection of all maximal cliques of $G$. The max-clique chroma...

1
Q: Custom expectations: Reuse existing `testthat` functions

thothalI came up with these lines to test if an R list contains a certain element at a given index (supplied by purrr::pluck syntax): library(testthat) expect_list_contains <- function(object, val, ...) { # 1. Capture object and label act <- quasi_label(rlang::enquo(object), arg = "object") # 2. ...

1
Q: Icosahedron missing triangles

JaxI'm trying to create an icosahedron (I've been trying to figure this out for about a week). Basically, I followed this article to create an Icosahedron mesh in code, and the positions of the vertices are correct, but there aren't enough triangles in the mesh (there are some weird gaps - I'll atta...

22:28
1
Q: How can I get rid of the "File Access Denied"?

DominiquePlease pardon my frustration, but Windows file access permissions is really extremely bad: In SQL-Server Management Studio, I have used a stored procedure in order to create a trace file, something like: DECLARE @TraceID INT; DECLARE @MaxFileSize BIGINT = 50; -- File size limit in MB DECLARE @Tra...

GIS
GIS
2
Q: Converting formatted data without geometry definitions from CSV into TIFF

Good_AllocationI am trying to convert thermal image data from a CSV format into a TIF. The FLIR software outputs the thermal image data as a .csv file which is formatted as below: 33.5,32.3,31.0,30.3,30.5,29.9,29.9,28.9,28.5,28.3,27.8,27.4,27.4,27.5,27.5,27.5,27.4,27.4,27.5,27.6,27.4,27.6,27.2,27.5,27.4,27.1,27...

CS
CS
22:49
4
Q: Does 1 Corinthians 1:21 mean that philosophical theology is misguided?

Toasted UraniumI know that Romans 1:20 is typically taken as support for natural theology, and I agree. However, let me emphasize what concerns me in 1 Corinthians 1:21: 1 Corinthians 1:21 (ESV) For since, in the wisdom of God, the world did not know God through wisdom, it pleased God through the folly of what...

2
Q: Why would the Boeing 777 not included in Jane's All the World's Aircraft?

WasserwaageI am currently sitting in front of the last 9 issues of Jane's All the World's Aircraft - In Service at the British Library (issues 2013-2014 to 2023-2024). To my great surprise, the Boeing 777 is not included in any of these issues. Am I missing something obvious? Just to make sure, I even check...

1
Q: {¬Logic, English} ⊢ (English→Logic): Is this equation Logically correct?

Ashish ShuklaSince I am reading Logic in wonderful Book by Derek Goldrei, a question came to my Mind, Can I Teach Logic to someone who just knows English?! So first I wanted to check whether it is "Logically Possible" ALSO since I am learning to talk like Mathematicians, I wanted to ask this question in the L...

1
Q: Repeated partial derivatives

anxious_planktonBig Mathematica novice here, hopefully this isn't too trivial? I would like to define a function in Mathematica that takes $f$ as an input and produces repeated applications of the operator $\Theta_\alpha = z_\alpha \partial_\alpha$ on $f$. Here $f$ is any function of multiple arguments $\{z_\alp...

TeX
TeX
23:14
2
Q: savebox + userbeamerfont in beamer not working as expected

NucNerdI want to create my own title page in beamer. I am attempting to position a title and subtitle in a TiKZ environment by working out the height of the title and positioning the subtitle below it, so that a multi-line title would not obscure the subtitle. My try at this was using saveboxes and grab...

23:34
2
Q: What happens when battery polarity flipped over my MOSFETs?

Alexander OhmI have the following high side switch circuit in a device. By mistake, the 3.6V LTC battery was connected in the reverse polarity (it was connected as drawn in the figure, but the circuit is designed for the positive pole to be upwards and GND downwards). The MCU with the GPIOs was unpowered. Wha...

DIY
DIY
23:57
1
Q: How do you hide silicone caulk at a cabinet to countertop joint?

longm113We recently painted our cabinets, and ended up with an ugly looking line at the clear caulk joint between the top of the cabinets the countertop. The brown is the old cabinet color showing through the clear silicone Any tips on how to clean this up a bit without cutting out the sealant and replac...

1
Q: Do string instrument players practice bow movements separately?

user65560In an entirely unrelated research paper1 I read the following: It reminds us of the process a musician goes through if he wants to master a difficult segment in a piece of music. If he is a cellist, for example, he will play on an open string with his bow, without worrying about the left hand an...

TeX
TeX
3
Q: LaTeX3 fails to rescan strings containing a comment

tobiasBoraIf I store in a LaTeX3 string a string containing a comment and rescan it later, everything after the comment seems to be gone, like if the newline was not considered during the rescan. Am I doing something wrong here? MWE \documentclass{article} \usepackage{robust-externalize} \usepackage{tikz} ...


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