Is there a way to declare that subscripted letters are not functions of the letter? By default, this happens: In[5]:= D[Subscript[t, 0], t] Out[5]= (Subscript^(1,0))[t,0] which I can understand but is slightly eye-roll-inducing. Mathematical practice would like this t_0 to be constant.

I like to spend my life with mathematics. I think it is the best thing I can do in my life. However, I have great difficulty explaining what I am doing to non-mathematicians, even educated ones. For example, my mom and dad know nothing about what I am doing even if I try to explain the philosophy...

I am considering using the Octopus app instead of the Octopus card for a short stay in Hong Kong. I don't have data roaming in Hong Kong. If I want to make a payment with the Octopus app, do I need data roaming for the payment to go through?

I was trying to calculate R_TH using an open-circuit voltage and a short-circuit current, and I am having trouble with the current measurement. I noticed that my calculated R_TH didn’t match my measured value. I’ve tried 3 different multimeters and on all of them, my voltage and resistance values...

Disclosure: I do not live in the USA and so am only picking up bits of American news from various places. What I'm picking up on is that one of the larger things in the United States is a legal argument whether Donald Trump can be listed on state primaries, because some states have barred him bas...

According to Halacha, a woman is exempt from certain time bound mitzvot. My question is, are women obligated to recite Hallel on certain Jewish holidays, or since it is time bound to those days are they exempt?

Is there a chemical process to deposit an aluminum mirror onto a surface similar to the tollens reagent process for silver? I should add that any liquid process would satisfy my curiosity, it does not have to use water. Just anything to reduce the aluminum ions into metallic aluminum nano particl...

Given a string \$X\$ we will say two strings, \$a\$ and \$b\$, are building blocks of \$X\$ if \$X\$ can be made by concatenating some \$n\$ \$a\$s with \$m\$ \$b\$s in any order. For example the string tomato has building blocks to and ma: to ++ ma ++ to We will say that the fineness of a set o...

As a glider pilot, we learn that Best L/D airspeed does not change with altitude. That is, the Indicated Airspeed (IAS) to fly in order to achieve Best L/D is the same no matter the altitude or air density. Additionally, that Best L/D does not change either. Best L/D is calculated from the polar ...

An iPhoneXR is outfitted with IOS 17.3. Settings => FaceID returns: I did could not find the security feature and did not turn it on. When I tap my AppleID at the very to of Settings, it does nothing. The Wall Street Journal indicates: You must have two-factor authentication and Find My enabl...

list = {{"d", 10}, {"a", 10}, {"a", 12}, {"c", 8}, {"z", 6}, {"a", 6}, {"z", 12}, {"d", 15}, {"b", 14}, {"b", 13}}; With Split the expected result is easy to get, Cases[{_, __}] @ Split[list, #1[[-1]] <= #2[[-1]] &] {{{"d", 10}, {"a", 10}, {"a", 12}}, {{"z", 6}, {"a", 6}, {"z", 12}, {"d",...

Please help me to write this acceptably. James 1:5 in the NIV states that: If any of you lacks wisdom, you should ask God, who gives generously to all without finding fault, and it will be given to you. James 1:7 tells us: That person should not expect to receive anything from the Lord. In Ja...

I have a Debian 10 server running on a VPS. The only software I installed is: tinyproxy (http proxy) and fail2ban I have included the results of port scan using ss I have included my specific settings in the fail2ban jail.local file. I have included below a sample of entires from fail2ban log ...

I’ve come across this and kind of just wondering if it’s to god to be true, and if not, then how it likely works and why it would seem to be so rare. What are folks’ thoughts?

I am from Uruguay (South America), and I am trying to book a flight that goes from MVD to Tokyo, and goes back via Manila to MVD. I have found this flight with United, but the return seems too risky, since it only has 1 hour and 20 minutes in SFO to make an International to Domestic flight. What ...

Is there a convenient way to make sure that all bolded texts in my document are never italic? Here is a MWP: \documentclass{article} \newtheorem{theorem}{Theorem} \begin{document} \begin{theorem} This \textbf{word} is in italic. \end{theorem} \begin{theorem} This \emph{\textbf{word}} is...

Recently wile solving questions on Thermal Expansion I encountered two types of questions Type 1: A rod with one half of mass 'm' and the other of mass '2m' is kept on a horizontal smooth surface, it is heated and it expands longitudinally. In this question centre of mass of system(the whole rod)...

wordreference.com: (1) He got himself injured. (1) doesn't have a word-for-word translation into my home language. Could you tell me please what exactly (1) means? To better understand (1), I want to compare it with (2) [the sentence I came up with by myself]: (2) He got injured. (2) does have a...

Suddenly my house (built in late 60s) has a circuit that all the outlets have tested (with 3 light Klien Tester) have ground neutral reverse code. Steps Taken: replaced all 6 outlets and 1 switch on the circuit. Replaced 15amp breaker in the box Tested voltage at the breaker in the box across ho...

A finite dimensional vector space is a vector space which has a basis (linearly independent spanning subset) with finite cardinality. If we accept the axiom of choice then it can be proven that every vector space has a (not necessarily finite) basis. The following are then equivalent: vector spa...

When the wallet examines a transaction for relevance what does it do exactly with that transaction's output scripts and what is that data compared to? Does the wallet database store a table of all the actual output scripts (i.e. witness programs) derived from its keypool? I'm especially curious a...

I have a dataset of dolphin encounters (count data) which are segregated by "type" of detection of an event (acoustic, visual, mix). I ran a GAMM to test the effect of environmental variables on the number of encounters. I have the following code: s1 <- gam(encounters ~ s(dist, k= 5, by = type) +...

I have three layers (one polygon, two point), and from the polygon layer I'm trying to select any polygons that contain points from both of the points layer. It seems like a simple Select by Location process, but that only allows for one comparison layer, so I'm not sure how to go about it.

OS: Ubuntu Desktop 22.04 I am initially logged in as user carl. I open a shell and echo $0, I get the confirmation that I am in a non-login shell. ("bash", no dash) But when I then echo $PATH I see that $HOME/.local/bin and $HOME/bin are both sourced, which is neither declared in ~/.bashrc nor in...

My attempt: $\lim_{n \to \infty}\left(1+\frac{1}{n}\right)^{n}$ $=\left(1+\frac{1}{\infty}\right)^{\infty}$ $=\left(1+0\right)^{\infty}$ $=\left(1\right)^{\infty}$ $=1$ Yet this clearly cannot be correct, as $\lim_{n \to \infty}\left(1+\frac{1}{n}\right)^{n}=e$ Where was my mistake?

The answer is two words (12 letters) which describe a pH table in a cryptic sort of way.

My question concerns the number of ways one may express "to decide to do sth" in German. One can use "sich entschließen" or "sich entscheiden" followed by a zu-infinitive clause. That I do know. But what about "sich überlegen"? I have read that it too can mean "decide" apart from "consider/think"...

There are four pegs in a row; let's call them A, B, C, and D from left to right. Peg A has a stack of $n$ differently sized disks, sorted in size so the smallest disk is at the top. All other pegs are empty. The goal is to move all the disks to peg D, following the rules: You can move only one d...

I need some help finding the name of a short story in an anthology I read. I think it may have been written in first person about a man-made machine intelligence that causes or survives through a human apocalypse and can create human shaped constructs. At one point it travels back through time t...

The World Duty Free shop in Heathrow sells boxes containing 2x1-litre bottles of spirits (~40% alcohol), advertising them as "Duty Free", and "For all passengers travelling OUTSIDE the UK". Staff confirmed that the duty-free limit for travelling outside of the UK is 1 litre. But these offers clea...

I'm 44 and I just started my private pilot journey, however I would like to see if is worth it to get the commercial and maybe fly for profit, I wonder how is the market for commercial airlines or maybe I would have better chances at smaller airliners or individual operations. I think CFI is one ...

Noob question here ;) I need to shade a human figure to look like the referenced image (White and blue-grey). I would also deed to know if it's better to be done in EVEE or Cycles. Thanks in advance!

Here is my bike: https://www.trekbikes.com/gb/en_GB/bikes/hybrid-bikes/fitness-bikes/fx/fx-1-disc/p/27987/ What appears to have happened is that the axle through my hub has sheared off due to some reason. I don't really know how to describe what has broken but it's the part that's gone through th...

Is it plausible for a mini-Neptune to form around another gas giant? How big would the main gas giant be to accomodate such a moon?

If two Japanese siblings are twins, do they still use the standard "older-then or younger-than" sibling terms for each other (お兄さん/弟, お姉さん/妹), basing it on whichever twin came into existence first, even if it was just by a single second? Or do they do something else?

I own an Apple MacBook Air M2, and a section of the screen is obscured by the notch. It’s only a matter of time before I encounter a problem where I can't access certain apps because the notch covers the icons, making them un-clickable. I’m up to date with latest software updates, surely I’m not ...

Is there any way that we can configure an Nginx without a public certificate? The objective here is, I want to publish an API on public internet, but all the API client (whitelisted clients) should SSL-pinning the public certificate within their Apps, instead of getting the certificate adhoc per ...

I was watching a clip from the Star Trek: The Next Generation episode, “Sins of The Father” (S03E17) where Kurn (Worf’s younger brother) says: “I shall try some of your burned replicated bird meat.” But just before this, Geordi La Forge states: “It’s not dead it’s been replicated… And you do u...

We studied this case in my 1L (i.e. first year of law school) property course. I am curious about the background on this case. I would've expected that her executor or beneficiaries would've had an interest in seeing the property preserved, but in the case summary we read they are silent, and ins...

I am a hobbyist and I am intersted in testing some materials for their ability of reflectance/absorbance/transmittance for microwave radiation and I want to know if a spectrum analyzer is suitable for this task and how to do this (setup)? I posted this question in engineering site and I was reco...

It is a very possible trend for all forces on the earth to unite, but at present it will not happen in the short term, and it is more likely to happen when the earth resists foreign enemies than spontaneous unity of human beings. Why is China proposing to build a community with a shared future fo...

Recently the long time left-wing German politician, Sahra Wagenknecht, formed a left-wing anti-immigration party.This is unusual, as the left is normally associated with pro-immigration policies. Are there other examples of left-wing anti-immigration parties? Note, I don't count parties such as t...

When going through pipe organ specifications (such as this one), I came across a peculiar nomenclature for manual / pedal compass such as: I Rückpositiv CDE–c3 II Werck CDEFGA–c3 III Oberpositiv CDEFGA–c3 IV Brustpositiv CDEFGA–c3 Pedal CD–d1 In particular, I'm asking about the meaning of the l...

Could I store a copy of very basic Pseudonymous order data in a non-essential place (Google Analytics) without user consent to essential cookies (which normally loads Google Analytics)? Either: Order ID hashed and Order Revenue Just Order Revenue This is data we already collect for essential pu...

I cant understand the infinitely small linear relation in calculas.i yet don't know calculas. But my physics book use the conclusions from it without explanation. I am a new one bear with me please. Edit as asked by someone Instant is an infinitely small interval of time curve can change directio...

Yesterday, I was enjoying dinner and drinks with my team members and company management of my work division. Both I and the rest of the team had been drinking (2-3 drinks) during the evening event. I am the team manager. Some background: My team member no longer drinks due to previous AA history...

Honeydew is a sugar rich secretion of certain types of bugs. Since these bugs are otherwise non kosher, is this considered non kosher as well, or are they kosher similar to honey?

I would appreciate a review of the following Rust implementation of high performance matrix multiplication. After reviewing available literature, including Anatomy of High Performance Matrix Multiplication paper and How to Optimize GEMM, I came up with an implementation that performs very poorly...

I have a list list = {2, -1, 3/5, (Sqrt[2] + 1)/3, Pi} How can I select from the list real elements that not integer and rational? That's mean, how can I get {(Sqrt[2] + 1)/3, Pi} I tried Select[list, Positive] and get {2, 3/5, 1/3 (1 + Sqrt[2]), [Pi]}

The bullied schoolboy appeared on television and the bullying schoolboy appeared on television . What is the difference in meaning. Is the 1st sentence subject is the victim ?

I want to learn about G-structure and intrinsic torsion. But I can find no textbook that details it. If you can give me a reference about it, it would be much appreciated.

Hello TeX Stack Exchange, I am working on a document using the figure environment and have encountered a layout issue related to the \hfill command. My aim is to evenly distribute two tikzpicture environments within the figure. I've noticed that to achieve the desired spacing, I need to include a...

I have hundreds of millions of symmetric 0/1-matrices of moderate size (say 20x20 to 30x30) which (obviously) have real eigenvalues. I wish to extract from this list the tiny number of matrices that have no small eigenvalues, where I am calling an eigenvalue $\lambda$ small if it satisfies $|\lam...

I have a vague understanding from listening to Prof Michael Potter that Frege was the first to succeed in combining Stoic propositional logic and Aristotelian syllogistic logic. Is there any hope at all some massive super logic could combine classical and a- or many non-classical logics? I don’t ...

Does anyone know what this is called?

I'm doing some GMAT exercises and this question came up to me. Unfortunately, I cannot figure out the final result. Mike and Jenny are buying fruits. Mike bought total 11 oranges and apples, which cost Mike 2.25 dollar. Then Jenny bought total 7 oranges and apples, which cost her 1.35 dollar. If...

I have a switch that control the outlet at my home. The outlet is located on the ceiling of a room. The switch opens/closes the neutral line (not hot). How dangerous is this for a house? I plan to remove the outlet, and simply connect a light bulb. The switch should still turn on/off the light bu...

I recently started playing DnD5E (the starter campaign Lost Mines of Phandelver), and read about the memorization of spells. And even more recently I started playing Baldur's Gate 3. In BG3 I noticed that I can put spells on and off prepared list for both Wizard and Cleric at will (except in comb...

I have a Lectric 2.0 ST ebike and it seems it is hard to find a good replacement for its Tektro MD-M280 calipers. I was wondering if the Tektro MD-C550 could be better as this model is dual piston but I do not exactly know how to verify this. a) Could MD-C550 be a direct replacement? b) Are there...

The narrator of Barbara Pym's Excellent Women is Mildred Lathburn, a clergyman's daughter in 1950s London. Here, Mildred's Welsh cleaning lady, Mrs. Morris, is complaining half-humorously about the High Anglican tendencies of their vicar, who wears a biretta while preaching: "It isn't like the c...

Is there an idiom that means "to carefully choose words while speaking"? Her topic was extremely sensitive, so she carefully chose her words as she spoke.

I tried searching in the docs in "Transformation Rules and Definitions", however there wasn't anything of help. So imagine I have these two rules: {x -> 2, y -> 3} {x -> 3, y -> 5} I want to do the following: I want to multiply the second set of rules by e.g. I: so something like this should co...

I'm not an Italian speaker, and I wanted to know which is the difference of assaje and assai, for example on the song Caruso the correct lyrics is "ti voglio bene assaje", or "te voglio bene assai"?

In the novella Filia regis et monstrum horribile, by Andrew Olimpi, I have read (emphasis mine): Fīlia prīma nātū est puella pulchra. Sed fīlia secunda nātū pulchrior est quam soror sua. [...] Fīlia tertia nātū vocatur Psȳchē. I don't understand the usage of the ablative nātū in the above text....

I have a table sys_QueueJob storing a Queue logic data. I thought that having an update with a return would be enough.... However, now I am not sure if this is 100% safe. How can I be sure that no matter an many parallel requests will not return the same ID? UPDATE sys_QueueJob SET ExecutionStart...

So, I was asking myself the question: if something will exist in the future, with almost absolute certainty, but has not come to existence yet, can one claim that it exists? And, can one claim that it is real? To me, those are two different questions. For instance, imagine you are building a légo...

Reading about the Common Travel Area, it looks like I, as a British citizen, can live and work in Ireland without restrictions. What I can't see is whether this can eventually lead to naturalisation in Ireland, or whether there are any restrictions in this area?

I'm trying to measure a differential voltage in LTSpice using the following structure: The simulation results are correct, the voltage at the output is very similar to the differential input voltage. My question is: Why are the 40k resistors R7 and R9 needed? When I remove them, the results are ...

Let's assume that we have two vectors in $\mathbb R ^3$, $v_1$ and $v_2$, such that $v_1 \perp v_2$ and $|v_1|=|v_2|=1$. Since the two vectors emerge from the origin, they can define a circle in $\mathbb R^3$ that includes both vectors and is perpendicular to their cross product. Now, the questio...

Let $S_i \in \{0,1\}$, $i=1,\dots,N$ be $N$ random binary variables, each taking the value 1 with probability $0 \le p_i \le 1$ (and the value 0 with probability $1-p_i$). I am interested in the sum, $$X = \sum_{i=1}^N S_i$$ Because the $p_i$ can be different, the distribution of $X$ can be compl...

I was driving on the highway and saw a car with the following sign: "Caution: blind driver". I checked and the sign was describing true events. How can this be possible?

I came across the following statement, while studying a Newtonian model for cosmic expansion: "If $R(t)$ is the scaling factor, we can define the Hubble parameter as $H(t)=\frac{\dot{R(t)}}{R(t)}$, being $t$ the cosmic time." What is the definition of cosmic time? Is it the same for all observe...

I'm asking this because the smaller the distances between electromagnets, the stronger the electromagnetic field. I don't know if this would mean a proportinal increase in power, be either torque orRPM. The closest I could find to this was this article which explores the use of ferrofluids to red...

I made a Key Tester using the STDIO header included with GBDK. It works... Until it doesn't. All the keys register and print to the screen, except the Left(5) and Right(4) Directional Keys, which cause the program to crash and the screen to go blank. Pressing Left shows me this line in the Debugg...

I've often wondered why there needs to be a different colour in the keys on pianos, organs and keyboards. After all, their location and shape differentiates them regardless. I can understand the need for blue and red strings on harps, as otherwise all the strings would appear the same, with disas...

I am trying to make two tables side by side. I think it's best to show you what I am trying to achieve with an example: Both of the tables should be of the style of the right table. In the picture I drew the left table should be exactly the same as shown in the right image. The right table in t...

I have just come acrosscite the case of a woman who had triplets (a boy and two girls) baptised in Edinburgh on 9th April 1709. How long they survived after this, I don't know, but they survived to baptism anyway. Does anyone know of an earlier recorded case of surviving triplets, either British ...

Can someone create a step by step, how to import a legacy P2PKH WIF key on testnet (let's say cSTHGbKgKLCGDRRn5AgtS7L4KHkqmdBau4nsEw8ckAzXV784bgeR) into Bitcoin Core 25.1 descriptor wallet using the Debug Console?

This is a follow up to a couple of questions on Deutsch's foundational paper on quantum Turing machines. In it, he determines $f(0)\oplus f(1)$ with a single query by measuring a state prepared as $\frac{1}{\sqrt 2}|0,f(0)\rangle+\frac{1}{\sqrt 2}|1,f(1)\rangle$. But as explained by John Watrous...

There is the proposition that if evil exists in the world then how could an omnipotent, omnipresent God allow that evil to happen. The Abrahamic faiths propose that God created the garden of Eden which was a place free from evil and was a paradise for Adam and Eve. Bad happens in the world. I can...

Similar to this site's question on impostor syndrome, what strategies would people recommend for dealing with self-doubt and discouragement on the academic job market? It's not that I think I'm an imposter; frankly, all of my academic peers are in the same boat. I also haven't been searching very...

I have some HP OEM systems with Windows 11 Home preinstalled. Since they all should connect to a MS365 company account, they need to have a Pro versions (at least as far as I know). Otherwise the setup wizard does not allow company accounts and only accepts private Microsoft accounts. Now that I ...

Note: I've originally asked this question on math stack exchange, but I have learnt that this is the better place to ask for research level questions, so I have deleted the original question there. Let $\mathcal C$ be a finite category. Are all flat functors $\mathcal C \to \mathbf{Set}$ necessa...

I like stolen device protection in iOS 17.3. I want to turn it on. However, I want to require the passcode to unlock the device. I do not want the device to be able to be unlocked with biometrics (touch ID, FaceID) alone. Is this possible? If so, how?

How exactly does Bitlocker work in TPM-only mode, when I not only encrypt the boot drive but also other drives with data? If someone steals the whole computer he can't login, due to a windows password. According to the answer in this question using a bootstick will alter the boot process and thus...

A promising student of mine has asked me to write them a letter of recommendation for a research internship they are applying to. I believe the student is a very good candidate for an internship, but outside of class, I have not had many significant interactions with them. That being said, they h...

The US famously uses acts like FCPA (Foreign Corrupt Practices Act), or the OFAC (Office of Foreign Assets Control) to indirectly get industrial assets (like Alstom that got bought by GE after a 700 million $ fine) and intelligence through their monitoring actions. If you get fined for those acts...

I have been learning the basics of inductors in simple LR circuits with DC currents. I think I get most of it but I am a bit unclear about the secondary EMF produced by the inductor after the primary supply is disconnected. In particular I am unsure about the actual electric potentials at the end...

In a scenario in which we have conscious souls (igorning all the arguments against that for now), would the following be a stastical argument for reincarnation? Supposing we are in something like an inflationary model of the universe where sequentially infinite universes with intelligent life can...

I am a complete beginner with product photography and I am trying to take a good picture of dried mangos in a jar. I have two lights bought for product photography and a white poster that I folded against the wall as most tutorials explained. Unfortunately, my pictures always come out very bad, a...

In May 2023, a group of Christian tourists from the US in Jerusalem were harassed by a group of Jewish religious extremists in Israel and told to go home. This violent protest was attended by Jerusalem Deputy Mayor Arieh King giving an indication that it was not a fringe group. On 4 October 2023—...

Let $K$ be a complete extension of $\mathbb{Q}_{p}$ with valuation $v$ over $p$, valuation ring $R$, maximal ideal $\mathfrak{m}$ and residue field $k$. It is well known that if $E/K$ is an elliptic curve, then the valuation of the $j$-invariant of $E$ determines it's (potential) reduction type; ...

I posted this question on Math Stack Exchange about 10 days ago, but received no answer (https://math.stackexchange.com/q/4843881/1223994). I would like to ask for references on semigroup actions on metric spaces from a topological point of view. Thanks