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00:03
5
Q: When is a holomorphic fiber bundle a vector bundle?

Yuanjiu LyuSuppose $B\subset\mathbb{C}$ is a contractible open set, and there is a complex manifold $X$ and a holomorphic map $\pi: X \to B$ such that each fiber $\pi^{-1}\{b\}$ isomorphic to $\mathbb{C}$, i.e. $\pi$ is a holomorphic fiber bundle. My questions are Does there alway exist a holomorphic secti...

TeX
TeX
2
Q: Coordinates calculated with PostScript

leobbThe code \documentclass{article} \usepackage{pstricks} \SpecialCoor \begin{document} \def\f(#1){#1} \begin{pspicture}(0,0)(5,5) \psdot(* 3 {\f(3)}) \end{pspicture} \end{document} works as expected. However, this \documentclass{article} \usepackage{pstricks} \SpecialCoor \begin{document} \def...

DBA
DBA
3
Q: What is a good way to handle an error while parsing a T-SQL command that doesn't exist on an older version of SQL Server?

AABCDSI am trying to grant the [CONNECT ANY DATABASE] permission to a specific SQL account on multiple instances. However, one server is running SQL Server 2012 and that permission was not introduced until 2014. I've been looking for additional ways to handle this particular error gracefully so that t...

00:48
8
Q: 40s-50s short story about a man who gets aliens to solve problems

UnknownOrbitsIn the story this man somehow gets or maybe is given the ability to mentally ask a question and get the answer. The gimmick is that in doing so he's telepathically linked to a being in the far future, possibly an alien, who believes he has thought of the situation on his own, and is then compelle...

3
Q: Is this remark by Cenzer about stable ordinals correct?

C7XLet $L_\alpha$ denote the $\alpha$th level of Gödel's constructible hierarchy, let $\Sigma_2$ be the class of formulas from the Lévy hierarchy, and let $\prec_{\Sigma_2}$ denote the elementary substructure relation for $\Sigma_2$ formulas. When $M$ is a transitive set, let $M$ stand for the struc...

1
Q: separate out x when x is on both sides of a fraction

Spencer BarnesThis isn't a textbook question, it's a real-life one from me trying to make a code process to efficiently fill a rectangle with circles (which is a whole bigger problem). So far in equations I've got to: $W = (x+1)\sqrt{r^2-(d/2)^2} + r(x-1)$ But I need to find $x$ in terms of $W$, $d$ and $r$. M...

01:13
2
Q: Arena/Region Allocator in C++ (rev 2)

HernanATN2nd revision of original post: Arena/Region Allocator in C++ Context, changes Trying to get a better grasp on low-level memory management, I implemented an arena allocator in C++. It's a rough learning exercise inspired by Casey Muratori's and Tsoding's advice on memory management. This revision ...

 
1 hour later…
CS
CS
02:17
4
Q: Are any applications currently banned in the USA?

Obie 2.0The USA has passed a law that would ban the application TikTok, owned by the Chinese company ByteDance, unless the application is either sold to an American company or the Supreme Court chooses to block the law as unconstitutional. The bill passed with bipartisan support, but has attracted some c...

4
Q: What is the current Trusted Traveler renewal grace period?

MidavaloI am waiting on my SENTRI renewal to be approved, with the expiry date approaching. On my TTP dashboard under Pending Review it says Due to a significant increase in application volume, we are extending the grace period to allow you continued full benefits while U.S. Customs and Border Protecti...

02:39
2
Q: A variant of the vertex clique cover problem

Math_YAssume that I have a graph $G(V, E)$, where each vertex $v$ is assigned a non-negative weight $w(v) \geq 0$. I aim to find a partition of the graph into cliques $C_1, C_2, \ldots, C_k$ (Here, $k$ is not necessarily fixed and can be optimized) such that the following is minimized: \begin{align} \a...

1
Q: I am a US citizen presently in India. I am planning to leave India for UK, what should be my US passport validity?

Bipin ShahI am a US citizen presently in India. I am planning to leave India for UK in May, 25. What should be my US passport validity?

1
Q: How to replace matrix indices as subscripts

TDHI have a list of the form {a x[1] + x[2, 3], w A[3, 4] + x[1]}, where I want to replace all the indices as subscripts, ie, the output should be of the form: {a Subscript[x, 1] + Subscript[x, 2, 3], w Subscript[A, 3, 4] + Subscript[x, 1]}. I tried to use the pattern matching {a x[1] + x[2, 3], w ...

CS
CS
03:24
1
Q: Trying to find voltage across 2kΩ Resistor using Thevenin's Theorem

Bill Nick I'm trying to find the voltage that goes across the 2kΩ resistor, i've only managed to calculate I1, I2, I3 as you can see and i'm stuck. I also know of course that I6 = 10mA but nothing else is working? I posted a previous question but it was unclear so i'm posting this again including what i'v...

03:46
6
Q: A group of scientists discover a way to manipulate reality using three colors of gluons

FuzzyBootsI think I read this in the early 1990s. A group of scientists (I think three, two men and one woman) are living in a not-so-distant future and they find a way to gain reality warping powers employing gluons. I want to say that it somehow involved manipulating the Planck constant to make it the sa...

4
Q: Make a textual Paint-like program

Weird GlyphsWrite a program/function that can help users make simple drawings by moving a cursor contained within a grid of characters, and by selecting which characters should be at a specific position. Expected Input and Output The user will be able to work on an area of 80 x 25 characters and will start a...

1
Q: Why is the front chainring aligned with the center of the cassette, also for 1X?

Konstantin ShemyakWhen riding 1X drivetrain, mostly ridden sprockets are approximately within 1/3 distance from the smallest ones. For example with 12 sprockets this would be about 3-4-5th sprockets counting from the smallest one. (This is what I experience for myself, but I think this is typical. Holds for both r...

CS
CS
04:31
1
Q: Gigaohm bias op-amp input design

Benjamin PaffhausenJP1 connector (below IC in layout) will receive a small metal wire (1 inch) as sensor to pick up electrostatic fields (1 Hz - 1 kHz). An op-amp will amplify the signals and send them off to an ADC, there is only little gain (2x). To pick up small low frequency signals a very high resistor (R3, 5 ...

1
Q: How can the ground reaction force be greater than the weight of a bouncing ball when its COM has zero velocity?

DubiousI was looking at the answers below regarding a bouncing ball and found something that confused me from a physics perspective. What makes a ball bounce back up? Here is an extract from the answer below: "It may be helpful to think of the ball as a spring. The force the ball exerts depends on the ...

2
Q: Why can't modus ponens derive all entailed literals in a horn clause system?

Tilo RCSuppose a -> b and ~b. Both of these are horn clauses. ~a is an entailed literal, but it doesn't seem possible to derive it using only modus pones. It's my understanding that modus pones is complete when dealing with systems of horn clauses. So for any system of horn clauses it should be possible...

04:56
2
Q: Progressive Matrix with 3x3 grids that have dark blue and light blue cells

Logine MagdiI have downloaded (IQ test- IQ Arena) app on IOS and I don’t know how to solve this.

05:17
1
Q: Is "Katrins Gäste wollen Volleyball." a grammatical sentence?

desmoIn a Duolingo listening exercise this line was given as the prompt: Katrins Gäste wollen Volleyball. And I was asked to give a yes/no answer. The listening material goes: "Hallo, ich bin Katrin. Meine Gäste wollen Volleyball spielen, aber wir haben keinen Ball." What struck me as unusual is the...

7
Q: Can I ethically ignore papers related to my research but published in predatory journals?

studentI've recently reviewed a paper in a prestigious journal in my field, which was very poor and got rejected. In my reviewer report, I listed the errors and unsubstantiated claims that the authors have made, to at least give them a chance to improve in their next submission. I've seen the reports of...

3
Q: How to prove inequality regarding maximum value of second derivative of a non-negative function?

Domenico FossacecaI am struggling to solve this exercise. Let $I\subset\mathbb{R}$ be an interval (whether open or closed, bounded or unbounded, etc.), and let $\phi:\mathbb{R}\rightarrow\mathbb{R}$ be a twice differentiable function such that $\forall x\in \mathbb{R}\setminus I\;\;\phi(x)=0$, $\forall x\in I\;\;...

06:00
1
Q: What did students write on in the 17th century?

22flowerWhat did school children and university students write on in the 17th century? Did they have notebooks, what type of papers they used and did they write with feather and ink?

2
Q: How am I supposed to put a thru-axle hub in my truing stand?

Chris HI'm used to building QR wheels, and have only just started using a truing stand (just a cheap one) instead of the bike frame/forks. But now I'm building a front wheel for my Topstone, which has a thru axle. With QR wheels I'd drop the axles in the notches of the truing stand, do up the skewer (n...

3
Q: Meta cross-number

AlephSquirrel Leading 0s are not allowed. The Across and Down clues are given in the usual left-to-right, top-to-bottom order, but you have to figure out where their corresponding answers go. Not all white cells will be filled. In each "8"-shaped section, the answers will form a seven-segment style digit, for...

06:47
1
Q: Scheduling conventions used in markets

KiNestI'm aware of "roll day" convention when for generating a schedule roll day is used, such as: adding for instance 3M to a date dd/mm/yyyy means adding 3 to mm (for example by adding 3M to 15/01/2024 you get 15/03/2024). This particular rule is widely used for schedule construction in IRS contracts...

07:08
2
Q: Electronic tools and broken devices for repair, should I put them in the bag or checked luggage?

IsaI'll be flying Turkish Airlines from Istanbul, Turkey, to Dublin, Ireland soon. I have a box of stuff that I want to repair, as well as a few personal electronic repair tools (screwdriver set, soldering iron that uses no batteries and a multimeter). The devices for repair are all pretty small, mo...

TeX
TeX
1
Q: Fill Between Graphs Problem

Nick BI am updating my code. For some reason, this is the only graph on my notes that will not produce the area under the curve (-2 to 2). Can anyone help me with this? If I remove the ```p\pgfplotsset{compat=1.18}''` it works fine. Any help is appreciated. \documentclass{standalone} \usepackage{pgfpl...

2
Q: Thread-safe payment registration emulation practice

MohamedI wrote this small service which emulates a payment registration system. My main concern is thread-safety in general, and the caller shouldn't be able to register a payment while one is already in progress. The service code: using System.Collections.Concurrent; using Microsoft.Extensions.Options;...

CS
CS
07:29
2
Q: Why is there a delay in when a ceasefire takes effect?

BarmarWhen they announced this morning that an agreement reached in the negotiations between Israel and Hamas in the Gaza War, they said the ceasefire would take effect Sunday, i.e. 3 days later. At the time, Israel's cabinet was expected to ratify the agreement later today, although that vote has sinc...

2
Q: Rational functions in two variables are not rational functions in one variable

Nik BrenAssume $k$ is an arbitrary the field. Then it seems intuitive that $k(x,y) \not \cong k(z)$ as rings. But I don't know any good proof. This is just what I can sketch: Assume the contrary. Then there is a ring isomorphism $\varphi : k(x,y) \to k(z)$ Then, there are distinct rational functions $f(z...

CS
CS
07:51
2
Q: Does the action of "Spitting in her face" refer to an ancient custom of discipline? Numbers 12:14

ray grantWhen dealing with the punishment of Miriam, Moses sister, the LORD God mentioned a certain type of conduct that seems quite uncivil: spitting in the face of a daughter. Is this a custom in the Near East in ancient times. Was God simply stating an extreme example of conduct, to explain the punishm...

08:15
1
Q: What happens if Windows 10 21H2 Pro or Windows 11 24H2 Pro gets deactivated?

Franck DernoncourtI wonder what happens if Windows 10 21H2 Pro or Windows 11 24H2 Pro gets deactivated. I read that I will lose some customization abilities, but I wonder: Which customization abilities will I lose? Will it reverse the settings I already customized to some default settings? Will I lose anything el...

2
Q: Go to Heaven, or Bring Heaven to Earth; which is the Biblical emphasis?

ray grantIn a recent interview (January 17, 2025), an oxford scholar and theologian, having written 90 books, concluded that the emphasis both in the O.T. and N.T. was NOT on getting people to Heaven, but rather, bringing Heaven to earth! He alleged that there was too much emphasis in hymnals, as well as ...

08:38
3
Q: Dummy by dummy interaction in Poisson regression

demog_kyI am doing a Poisson regression in R to estimate deaths by age group by virus, where the interacting terms are factors: model <- glm(death_count ~ strain * cohort + age + year, family = poisson(link = "log”), offset = log(exposure), data = df) My df is pane...

2
Q: What happens if a check bounces after the account it was deposited in is closed?

StevoisiakI received a check as part of a job offer and deposited it into my checking account. I later learned this check was likely part of a scam. My bank cleared and the funds have been made available, but I suspect the check will bounce and I have been advised not to spend the deposited money. As a pre...

DIY
DIY
08:59
1
Q: Repairing large drywall cutout myself?

mayorcesarHad a leak and needed to get the drywall cut out to replace the pipe. We've already put quite a bit of money into this repair so we're wondering if we'd be able to repair the drywall ourselves or if we'd be better off getting a contractor to do it. If it's feasible DIY what would be the best way ...

09:20
1
Q: Returning Boolean from apex controller to lwc is {}

MacMamaI'm doing a count on related records on the Contact apex public with sharing class FileController { @AuraEnabled(cacheable=true) public static Boolean hasFiles(String contactId) { if (String.isEmpty(contactId)) { return false; } // Query to check if rel...

DIY
DIY
09:43
1
Q: How ought I frame a wall with nowhere to fasten the top plate?

ivorysoapMy house has an unfinished basement with bare poured-concrete walls. I want to insulate the walls by building a framed wall (2x4 @ 16” o.c.) against the foundation wall with R20 fiberglass batts in the cavities. (This will be a non load-bearing wall) In the other parts of the basement, it was a...

10:27
2
Q: Can MAP-Pro gas be used in a propane camp stove?

User1974If all I have on me at a backwoods work/camp site is MAP-Pro torch gas, would it cause any problems if I used it in a propane camp stove? Bernzomatic MAP-Pro Hand Torch Cylinder, 400-g Outbound Double-Burner Propane Camp Stove

1
Q: Did the loss of Starship Test Flight 7 force plane flights to be diverted?

Russell BorogoveA BlueSky post from Jon Ostrower implied that the explosion of Starship test flight 7 forced airline flights to hold or divert. I would have assumed that any likely corridor for debris would have been an FAA keep-out zone during the launch and ascent. Did any flights actually have to change their...

1
Q: Regarding which is more efficient at improving the fidelity of entangled pairs, error correction or purification

QIAN To enhance the fidelity of entangled pairs, common methods include error correction and purification. For different channel error rates (corresponding to different initial fidelities), these methods might have their respective advantages, especially considering the Depolarizing channel. In my ass...

10:51
2
Q: Is it possible to cancel one leg of an Amtrak fare?

Azor Ahai -him-I purchased a coach fare on Amtrak. The web tool only seems to let you cancel an entire trip. Is it possible to cancel only half the trip?

3
Q: Does the definition of melisma include the consonant in a syllable or is it just a run on a vowel?

LeciferSo a syllable is typically defined by linguists as a nucleus (most often a vowel) with optional sounds before or after that nucleus (margins, which are most often consonants). This means that syllable can just be a vowel without a consonant. The examples i’ve heard of melismas are always runs on ...

TeX
TeX
3
Q: Text fractions in Cambria have too much space around solidus

deddedText fractions look bad in Cambria for me. I haven't had this problem in other fonts that support them, and they look fine even in Cambria if I use bold, italics, or bold italics. Is there a way that I can get rid of the ugly, too wide spacing between the digits and the solidus? Unfortunately not...

11:15
4
Q: Determining Necessary Conclusions from Logical Statements

NellI am working on a logic problem involving quantified statements, and I need help determining which conclusion necessarily follows. The premises are: All lemon cookies are tasty. Some tasty cookies are expensive. We need to evaluate which of the following conclusions is necessarily true: a) All ...

11:36
1
Q: How does this chord progression work?

Rizzy I've been studying other people's chord progressions to get better at creating my own. I found this one online and it really stumped me on how it works. I put down what I'm thinking so far, but I'm relatively new to this so please let me know if I'm going about this wrong :). D min -> D# dim7 : ...

11:58
1
Q: Travel booking concerns due to drastic price and option differences

DavidI'm an older guy who's traveled globally most of my life, but I am about to take my first real vacation ever and just realized that I have never traveled outside of the military and business settings where someone else had the cumbersome task of choosing flights, hotels, etc. Now that I am forced...

12:21
1
Q: How was the helmsman able to discern the torpedo loading activity of a distant submarine?

Shane TysonIn Mission Impossible - Dead Reckoning Part One (2023), the helmsman, while maintaining a safe distance from the ice canopy above, detects an enemy submarine at a certain depth below the surface and promptly reports it to the Captain: Helmsman: Sir, he's flooding his torpedo tubes! Captain: Torp...

12:44
2
Q: Evaluate the limit involving the summation of natural logarithm

MathStackexchangeIsMarvellous Evaluate $$\large A=\lim_{x\to0}\frac{\displaystyle\sum_{i=1}^n\ln(1+x^{\frac{1}{2^i}})}{x^{\frac{1}{2^n}}}$$ where $n\in\mathbb{N}$ I incorporated several methods to solve this, all in vain. As $x^{\frac{1}{2^i}}\to0$ we can approximate $\ln(1+x^{\frac{1}{2^i}})$ as $x^{\frac{1}{2^i}}-\frac{x^...

CS
CS
13:03
4
Q: (Romans 3:31) If we are saved through faith, why do we still need keep the Law?

Brittany BernardRomans 8:7-9 King James Version (KJV) Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be. So then they that are in the flesh cannot please God. But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you....

2
Q: Is there a word or a name for a linguistic construct where saying you can do a thing implies you can do it well?

Michael Atkins-PrescottIt hit me that there's a funny linguistic quirk around the phrase "I can sing". The phrase implies that I am a good singer, even though I am not saying that. Technically the phrase "I can sing" does not mean I can sing well. (Fwiw, the distinction actually is important because most people who can...

3
Q: How rigorous would sterilization have to be for a Europa Lander?

tarorootFor the sake of the question, let's say that Europa Clipper has already determined that Europa is habitable, i.e. has prebiotic chemistry suitable for life. For a NASA mission which would land on Europa and probe the surface (and eventually burrow through the ice to explore the ocean), how comple...

3
Q: What are the current COVID-19 entry requirements for US Citizens to Bali?

ArunabhWhat are the current COVID-19 entry requirements for US Citizens to Bali?

2
Q: Basic Terminal Calculator in C++

Rajah WilliamsI'm a freshman Computer Science major looking to build projects for my portfolio. I'm new to C++ and programming in general. Is there any way I can improve this basic calculator I've made? Also, what are the next steps you would recommend considering what I've utilized in the program below? I've ...

13:28
5
Q: Did the solar eclipse reduce Covid-19 deaths?

urnproblemsI simulated some realistic data in R that shows how Covid-19 deaths looked over time vs days until the solar eclipse (April 8th 2024): If someone didn't know better, solely looking at the data, someone could believe that the solar eclipse was responsible for lowering Covid deaths. Furthermore, s...

13:49
1
Q: Setting up Windows Server Failover Cluster with Storage Spaces Direct on two EC2 hosts to recover from complete cluster failure?

MxCodeBeen working on a project using S2D on a two node WSFC using a Fileshare Witness on an FSx with nodes hosted on two EC2 instances running Windows Server 2022 each with an EBS volume. The automation is using FailoverClusterDsc to setup the cluster and Enable-ClusterStorageSpacesDirect to enable S2...

3
Q: What are the advantages of carnotaurus cavalry?

IMP9024In my world, there are many prehistoric animals still living. One of them is the Carnotaurus, also known as the meat-eating bull. I think it is cool, so I want to justify using it as cavalry. Unlike triceratops or t-rex, it would likely act as light cavalry, being built for speed with long legs. ...

1
Q: Is monad exactly the thing that makes Kliesli arrows composable?

MarkIs the monad exactly the thing that makes composition work in the Kleisli category? In more detail, let $\langle T, \eta, \mu \rangle$ be a monad over a category $\mathcal C$. The monad provides us with axioms (identity) : $\mu \circ (T \eta) = \mu \circ (\eta T) = 1_T$ (associativity) : $\mu \c...

CS
CS
14:32
1
Q: What is evil suspicion in 1 Timothy 6:4

Anita 1 Tim 6:4 - he is puffed up, knowing nothing, but unhealthy about controversies and disputes about words, out of which come envy, strife, slander, evil suspicions, What is “evil suspicion” in 1 timothy6:4. Does it mean that we should not suspect anyone without proof?

2
Q: Book about cursed worms that come from a doll

Martin L.I am looking for a book my brother and I read as a child a long time ago. It is about a brother and a sister, whose father died. But he left them a doll, that was inhabited by worms. During the story, said worms took control over sheep and it came apparent, that they were evil. The siblings also ...

14:58
4
Q: 6 x 6 Sashigane puzzle

Will.Octagon.GibsonSashigane rules: Divide the grid into L shaped blocks - one block wide. All blocks must be L shaped. Cells with open circles form the knee (bend) in a block. The number in an open circle shows the number of cells in its block. Open circles without numbers may have any number of cells. Cells with...

15:17
5
Q: Embedding 2k of RAM into video chip in 1987

AntonWas embedding 2048 bytes of RAM directly into video generating chip technically/economically possible in 1987? The access pattern is to write individual bits, read words (blocks of 16 bits) randomly.

1
Q: Does a normal Sylow subgroup span a characteristic subalgebra of the group algebra?

Mariano Suárez-Álvarez$\def\kk{\Bbbk}$Let $G$ be a finite group, let $p$ be a prime number dividing the order of $G$, and let $\kk$ be a field of characteristic $p$. Question. Suppose that the Sylow $p$-subgroups of $G$ are normal, so that there is only one of them, which we can write $P$. Is the subspace $\kk P$ of ...

2
Q: Questionmark when the word "Frage" is already in the question

DuesserBaestWhen I write a short message in German I sometimes have a last sentence summarizing the message: Die Frage ist also, ob wir das Projekt so umsetzen wollen(?) Pun intended: The question is thus if such a statement should end in a question mark or a period?(<-?)

ELL
ELL
15:39
1
Q: receive money to individuals Vs receive money from individuals

jiongxia zhu"Wire transfers: Allows you to send and receive money to individuals or institutions" "Receive money to individuals" doesn't make any sense, shouldn't it be "receive money from individuals"?

TeX
TeX
16:04
1
Q: Correct Indentation: Aligning the Beginning of a Line with a Certain Position in a Certain Previous Line

Алексей Рабинович The image above is an example. The beginning of the second row is determined by point A in the first row. The beginning of the third row and the fifth row are determined by point B in the first row. The beginning of the forth row is determined by point C in the second row. The beginning of the ...

RPG
RPG
16:24
2
Q: Spaceship or monster reference - what is the name of the planet eating Scro mega ship?

blueberryfieldsThis is from ADND 2e lore - I remember a Spelljammer scro world ending ship. It's a massive biological ship that constantly shifts its internal structure, and can break away pieces of itself to send down to planets. The pieces are stand alone and go around collecting materials to bring back for t...

DBA
DBA
16:49
2
Q: Is the data type `numeric(p,s)` accurate?

SotisI know that numeric is an "exact" data type, representing numbers as accurately as possible so that there are no floating-point errors such with float or real data types. But what about numeric(p,s)? It must approximate a number because of the fixed scale, but does it have floating-point inaccura...

CS
CS
17:30
1
Q: Does the moment of method work for full wave-length dipole antennas?

kileIn Constantine A. Balanis book about antennas, he introduced the moment of method for current distribution over a finite dipole. I found that the method of moments works well for a half-wavelength dipole, but it mismatches significantly otherwise. An ideal mathematical piecewise function \$ I(z...

1
Q: Understanding and Troubleshooting TAG IC Signature Verification Failure

LisbethI have a number of NFC tags with the following metadata: ‍‍ [usb] pm3 --> hf mfu info [=] --- Tag Information -------------------------- [+] TYPE: NTAG 215 504bytes (NT2H1511G0DU) [+] UID: 04 B6 DD 69 5F 61 80 [+] UID[0]: 04, NXP Semiconductors Germany [+] BCC0: E7 ( ok ) ...

5
Q: Schmitt trigger confusion

LoopLet's say I have an Op-Amp with positive feed-back, playing the role of a Schmitt trigger. When analyzing the circuit I set up the following system of equations from KVL: $$ \left\{ \begin{aligned} V_o &= A(V_+-V_-), \\ V_o &= \frac{V_+ - \beta V_\text{in}}{1-\beta} \end{aligned} \right....

17:55
3
Q: How to write fractions in the form of a/b and add alternating - and + signs between the elements of the following list?

John Paul PeterI have this list Clear["Global`*"]; primes = Prime[Range[10]]; list = Table[(-1)^(i + 1) primes[[i]]/primes[[i + 1]], {i, 1, Length[primes] - 1}] I want to write the above list in the form 2/3 - 3/5 + 5/7 - 7/11 + 11/13 - 13/17 + 17/19 - 19/23 + 23/29 to use command \xinteval{\xinttheexpr{2/3...

CS
CS
18:15
1
Q: How to solve the optimal dynamic consumption-leisure problem numerically

garejI refer to this post on the problem with two control variables. This problem may be called something else, but due to @tdm, it is as follows: $$ \max_{c_t, \ell_t} \sum_{t = 0}^\infty \beta^t[\ln(c_t) + \gamma \ln(\ell_t)] \text{ s.t. } \begin{cases} y_t = k_t^\alpha(1- \ell_t)^{1- \alpha}\\ k_{t...

1
Q: version 'GLIBC_2.25' not found on 16.04 Ubuntu (When I tried to start google-chrome)

Krishna Kanth YenumulaWhen I tried to run google chrome in 16.04 Ubuntu, i got this error: /usr/bin/google-chrome: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.25' not found (required by /usr/bin/google-chrome) I updated libc to the latest version. Please help. $ sudo apt-get install libc6 Reading package lists....

TeX
TeX
1
Q: Change default font size of theorem environments in beamer

Liu ZhiyuI want to change the default font size in beamer without specifying a theme. I have tried using thmtools with [notheorems] option but it didn't work. I also want to prevent a line break after the environment title, so I have added the makeatletter part as No break line after theorem name in beame...

18:41
1
Q: hello devs, I am trying to create a Safe on another chain with the same safe address, I am using python safe_eth todo this

Nacboticshere is the code for how the safe is created. MASTER_COPY_ADDRESS="0x29fcB43b46531BcA003ddC8FCB67FFE91900C762" PROXY_FACTORY_ADDRESS="0x4e1DCf7AD4e460CfD30791CCC4F9c8a4f820ec67" OWNERS=[ "0x834AC95D7B5798DFA6d7f6a7840368778C18Ce4e", "0xf2299eC60Dc7d7506012bd6b146E8f964646260A", "0x0d...

CS
CS
18:59
3
Q: Did the Higgs field "absorb" energy from somewhere during electroweak SSB?

sashoalmI'm not a physicist, just a curious layman. But I read that (if I understood correctly) the Higgs field acquired its positive VEV during electroweak spontaneous symmetry breaking (SSB). If that is so, this somehow reminded me of condensation, or of ice forming from water - I know that energy is a...

1
Q: Injectivity of certain integral transformation

pat2211One of my problems in statistics seems to be related to the following result, which it seems to be true but I have yet to find any proof or literature about it. Let $f$ and $g$ be two measurable functions with sufficiently nice regularities (I ultimately want the assumptions to be as weak as poss...

TeX
TeX
2
Q: Text wrapping in embedded multi-row, multi-column table (part II)

Lord CatThis is an extension to my previous question: Text wrapping in embedded multi-row, multi-column table, with a more relevant example. I have a table like the following, where I'd like to be able to merge arbitrary rows and columns, but where the text within cells remains wrapped. E.g. in the tabl...

1
Q: How to calculate swap_out amount from DEXes with sqrtPrice?

Kind_ManCan someone please explain me how to calculate exact output of token based on input and pool's liquidity and sqrtPrice? I just can't understand calculations on UniswapV3 type of DEXes. On V2 AMMs everything is easy: you take reserves0, reserves1, multipluying them and getting k. Then, based on wh...

19:22
2
Q: The truth and falsehood problem of the explosion principle

我們這一家I read on Wikipedia about how explosions work:{ P , ~P } ⊢ Q, For any statements P and Q, if P and not-P are both true, then it logically follows that Q is true. My question is, why can P and non-P be true at the same time? As far as I know, a proposition and its negation cannot be both true and ...

TeX
TeX
2
Q: Is there a better command to save the value in a cell to the AUX file using package spreadtab?

StevenProblem statement Using the approach from this question, in which a value is saved to the AUX file and loaded back in on the next compile, I'm able to display a calculated value in a table before the table is actually displayed. I'm loving this feature. However, I'm not completely happy with how ...

19:44
1
Q: HTTP-fallback and site settings in Chrome?

Panda142308I am testing a deep packet inspection based application to block certain undesirable websites in a corporate network, eg gambling - williamhill.es . We do this by matching ServerName (HTTPS) or Host (HTTP) in TLS ClientHello against a list of domains and sending a TCP reset to close the session. ...

2
Q: How to introduce variable names in english sentences

JackThis is a question about typesetting and communicating mathematics. I often encounter this question, and I wanted to know if there were conventions, or opinions on how is the best way to proceed. The sentence I want to write about is something like: " We then see that the Poisson ratio $\nu$ is g...

GIS
GIS
20:31
1
Q: Removing small island from vector dataset with GeoPandas

Pierrick RambaudI create an interactive map to evaluate aggregated values over specific administrative areas. When my tool is loading the initial map, all the countries in the world are displayed. I used the GADM dataset as a source and the resolution is way too high. As a side effect of their amazing precision,...

2
Q: When to use $x/y$ instead of $\frac{x}{y}$ in typesetting mathematics

asdfldsfdfjjfddjfWhen do we use \frac vs / when typesetting mathematics? I am reading ``Handbook for Writing of the Mathematical Sciences" by Nicholas Higham, and it says: A common mistake is to use the LaTeX command \frac instead of a slash: x = (y + z)/2 looks better than x = \frac{y + z}{2}. And indeed, in a...

TeX
TeX
1
Q: How to use LuaTeX for 8-bit input encoding and Unicode font?

AlekhIs it possible to use luainputenc for 8-bit input encoding along with fontspec for Unicode font? The following MWE in CP866 encoding does not work (LuaLaTeX): \documentclass{article} \usepackage[cp866]{luainputenc} \usepackage{fontspec} \setmainfont{Palatino Linotype} \usepackage{polyglossia} \se...

20:53
2
Q: How plausible is this airship design?

AcerbicOrbThe airship consists of a wooden frame and several balloons. The balloons are filled with a lighter-than-air Unobtanium gas. In order to control the airship's height, Unobtanium is pumped between a central rigid reservoir, and the balloons. In order to descend, the Unobtanium is moved to the rese...

1
Q: 12 cars placed on a frictionless circular track

kn2798Twelve toy cars, each labeled with numbers 1 to 12, are placed on a frictionless circular track in a configuration resembling the numbers on a clock. Initially, the cars are released with a constant speed of one revolution per minute, but the direction of motion for each car is chosen randomly. W...

CS
CS
21:13
1
Q: A want to calculate the number of turns for this transformer

Ammar AliI bought this core but I can't get it working. I need to boost 12v to 400v with 800w power. I am using push pull topology. I tested it with 3+3 primary and 80 secondary turns but it's not working. The MOSFETs 3205 get heated up quickly and gets roasted every time I test it. I am using sg3525a wit...

1
Q: What Color Would The Night Sky Would Be If The Day Sky Was Orange

Tim BensonsI created this earth like alien world in my head for a future show where the plants are blue and the sky is light orange during the day. What color would it be at night? Would it be dark orange at night? Would it be the same as ours? Like our day sky is blue, but at night is dark blue. Is it the ...

21:38
4
Q: If being cast into the Lake of Fire does not result in destruction, then what of Death?

Ryan Pierce WilliamsFor those that maintain that the soul is not destroyed in the lake of fire, but instead results in eternal suffering, how then do you interpret death being cast into the flames? Revelation 20:14 (NASB) Then Death and Hades were thrown into the lake of fire. This is the second death, the lake of ...

22:00
2
Q: Sort spreadsheet by "dan and kyu" rank

StefIn the game of go as well as in martial arts, shogi, for tea ceremonies and for flower arrangements, players have a rank expressed in dan and kyu. Dan and kyu form a simple numerical system: 30 kyu < 29 kyu < 28 kyu < ... < 3 kyu < 2 kyu < 1 kyu < 1 dan < 2 dan < ... < 8 dan < 9 dan In other wor...

Vi
Vi
1
Q: How to remap a character that is displayed?

EljayIs it possible to configure Vim so that the characters displayed for specific letters are substituted or remapped (for display purposes) with a different character. For example, if the actual text were this: hello_world ...the display text could be configured to render like this: hεllø⎽wørld My...

22:23
2
Q: Missing angle inside a semi-circle problem

shrihankpAs in the title, the figure below is a semi-circle. The grey-marked angles are known. We are to find the angle marked in red. Using GeoGebra's geometry tool I constructed the figure and the angle turned out to be $77^\circ$, which is indeed as per the answer key. How does one approach it without,...

22:46
4
Q: Simplifying solutions from the cubic formula

Tony HaslerI am just learning how to use the cubic formula and created a simple equation with which to experiment. I used $x^3+x=30$, which obviously gives a result of 3 by inspection. But using the cubic formula I get $\sqrt[3]{\sqrt{225+1/27}+15}-\sqrt[3]{\sqrt{225+1/27}-15}$. This result is correct but I...

23:05
2
Q: Is there a filesystem supporting Linux permissions and Windows readable?

dr_Is there a filesystem that respects both these requirements? supports Linux standard file permissions is recognized natively by Windows I would like to use it to format an USB external stick I mostly use for Linux stuff but would also like to access from a Windows machine. A simple workaround i...

4
Q: Are Stoicism and Hindu Philosophy compatible?

Rutajit45 a dudeI am a hindu and also have started reading meditations by Marcus Aurelius. I wanted to ask if both are compatible and I mean if i am hindu; can I also be a stoic without violating the philosophical principles of my religion?

1
Q: Minimial Live Ubuntu Bootable USB

ste_kwrI've been searching around trying to find a good Ubuntu Live option that I can put on a 2Gb USB stick. This has turned out to be surprisingly harder than I imagined. Most of the options are around Ubuntu install media on USB. For example this post here (which is great for its purpose). There is i...

23:49
2
Q: "Devastate" in "Wuthering Heights"

MT MTESKIn chapter 32 of Wuthering Heights by Emily Brontë, Mr.Lockwood went back to Wuthering Heights again: 1802.—This September I was invited to devastate the moors of a friend in the north, and on my journey to his abode, I unexpectedly came within fifteen miles of Gimmerton. The ostler at a roadsid...

1
Q: What is the default rank and suit of a stone card added to your deck?

StyxsksuThere are a few different times when stone cards are added to your deck, is there a default rank and suit for these cards or is there a way to determine what the value will be if we remove the enhancement?

3
Q: Does anyone have any insight on how Constantine the Great came to his Christian faith and commissioned Codex Sinaiticus?

Jacob FenwickConstantine the Great and his Christian faith: Does anyone have any insight on how Constantine came to put his faith in Christ and what specifically led him to commission the making of Codex Sinaiticus?


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