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TeX
TeX
00:04
3
Q: beamer and pgfplots doesn't work if tikz 'math' library is used

Denis BitouzéThe code provided here (where the workaround for gcd() issue isn't needed anymore, at least in pgfplots 1.18) does: work if the class used is e.g. article, not work if the class used is beamer. Indeed, the compilation of the following MCE: \documentclass{beamer} \usepackage{pgfplots} \pgfplotss...

2
Q: Area, perimeter and other geometric parameters of a "cucumber"

Alexei BoulbitchFrom the simulation, I have got a region with a shape of a cucumber. Here are the boundary points of this region: points={{-51.8154, -7.87585}, {-51.4981, -9.07511}, {-50.7058, -10.0832}, {-49.6018, -4.74619}, {-48.2803, -11.4124}, {-46.9928, -3.77299}, {-45.6489, -3.47276}, {-44.2639, -3.22...

1
Q: Zeros of higher Ext functors

Will BoneyI'm trying to understand module classes that are defined as the kernels of higher Ext functors (e.g., arising here; as this paper suggests, I'm coming at this problem outside of module theory). One way to do this, of course, is to understand the higher Ext functors and then specialize to the cas...

ELL
ELL
1
Q: What is the difference in meaning between the "baptizand/baptisand", "baptized/baptised", and "baptizee"?

GratefulDiscipleActual, recent usage I encountered a new term recently, referring to a person to be (or has been) baptized: the "baptizand". The context is this 2022 video Rebutting Gavin Ortlund on Baptismal Regeneration (minutes 16:38-17:12) where Gavin Ortlund used the term twice in the same paragraph: Two ...

DBA
DBA
00:21
1
Q: Remove redundant disable/enable key statements from mysqldump

TRiGA standard mysqldump will create a table, disable keys, insert the data, and re-enable keys. There are reasons for this. However, when a table is empty, the keys are still disabled and re-enabled. LOCK TABLES `Brands` WRITE; /*!40000 ALTER TABLE `Brands` DISABLE KEYS */; /*!40000 ALTER TABLE `Bra...

00:34
3
Q: How to GroupBy or Gather on a nest association

Craig CarterI've been trying to figure out how to gather or group on a list of nested associated--and flailing. Here is a reduced example. I'm interested in performance as the is for a larger example and the operation will be repeated frequently. Consider: test = { <|"me" -> <|"a" -> 1, "id" -> 2|>, "...

1
Q: Mechitza for Men and Women

bethebest Research suggests that a Mechitza is often implemented in a synagogue to prevent distractions and impure thoughts for men during prayer, which is understandable. However, it raises the question of why we assume that women would not experience similar impure thoughts. This is especially relevant i...

1
Q: Is it believable to store information in live DNA for billion years?

FrogOfJulyImagine a civilization that approaches Kardashev II. They are deep into spacefaring, they live on a few less than one-hundred colonized worlds. They've not found evidence of other sapient life, so they believe they are alone in the galaxy. The unfortunate news is that this civilization is dying. ...

GIS
GIS
4
Q: Using all columns to find the minimum within QGIS expression

HoneybearI want to use aggregating functions (min, max, mean, ...) on all the attributes (= columns) within a row. In this topic Finding the minimum value of different columns in QGIS, this is done by calling each attribute explicitly, e.g.: min('col_A', 'col_B', 'col_C') This works fine for a small numb...

01:05
1
Q: Modern references to Brill-Noether theory on curves?

user135743Are there modern good lecture notes/book about Brill-Noether theory of curves. Most interesting theorems here are proved via limit linear series, which I found no lecture notes on (instead there is the original paper from the 80's which references several older papers and while well written is ha...

RPG
RPG
1
Q: When Mounted On A Ship, Do Siege Weapons Take The Ship's Dexterity Into Account?

PapaWuwuBeen running a campaign using the ship rules as provided by Ghosts of Saltmarsh, but some confusion recently came up about the ship mounted weapons. While a siege weapon is an object and thus does not take in a creature's dexterity, assuming I am correct about that, is that the same case with a s...

01:41
2
Q: Are there any adverbs ending in -ly without an adjectival counterpart?

jManJust as underwhelm/overwhelm exist without any usage of 'whelmed' (generally speaking) I'm wondering if there's any adverb ending in -ly without an adjectival counterpart (or that has dropped out of usage). For example where 'he walked XYZly' is recognisable, correct, or common for this or some o...

DIY
DIY
1
Q: Is it ok that an oven circuit's wire is much larger than the oven's wire?

Eric WestlandI am replacing a Microwave/Oven combo. The circuit is 50 amps and 6 AWG wire runs to the back of the oven cabinet. When the old oven was installed, I assume they used the wiring that came with the oven which was 10 AWG in flexible conduit, wire-nutted to the #6. Was this proper? It was that w...

02:16
1
Q: What is happening behind an evaluation of Sort with meaningless order-function?

KeyspireIf we try Sort[] with meaningless order-function like Sort[{3, 2, 1}, True] or, Sort[{3, 2, 1}, False] gives {3, 2, 1}, i.e., Sort[] does not do anything. For the former case, I think it is natural because every comparison of two elements returns True, but what about the latter case? I tried th...

CS
CS
2
Q: Why are angles so weird?

krillI'm potentially asking quite a stupid set of questions here but I'm wondering if there is some overarching theory about why angles, and "rotational" quantities which deal with them, have such strange properties (to me - I might just have overthought this and confused myself). Firstly, I understan...

2
Q: How can we divide an equation by a function, where that function isn't guaranteed to be always non-zero?

Aviv CohnSuppose I have the following equation, where r(x) and y(x) are functions of x. r(x)y(x) = y(x)r'(x) My understanding is that we can divide both sides by y(x), only if we know that y(x) != 0 for all values of x. If that's not necessarily the case, my understanding is we need to consider both case...

6
Q: Rust .. or _ : what is the difference?

AfsaWhat is the difference between two periods and underscore in this case: let a = Some("a"); match a { Some(_) => println!("we are in match _"), _ => panic!(), } match a { Some(..) => println!("we are in match .."), _ => panic!(), } Both do compile...

02:41
4
Q: Better Stirling Approximation Error

MooStirling's Approximation is given by $$n! \sim \sqrt {2\pi n} \left ( \frac{n}{e}\right)^n$$ From a substantial improvement of the Stirling formula, we have an elegant approximation given by $$n! \sim \sqrt{2 \pi n} \left(\frac{n}{e}+\frac{1}{12 e n}\right)^n$$ We can write a simple function tha...

02:59
2
Q: What kind of rear derailleur is compatible with hanger on my bicycle

Kevin HoogerhydeI have a Giant OCR (2004). I need to replace the rear derailleur (10 speed long cage - triple front chain ring). I've attached a picture of the hanger. What type of derailleur would work with this configuration? Not looking for the top of the line component, but a moderately priced. Thank you. ...

03:18
1
Q: Cisco interface vlan (shutdown vs no ip address)

Derrick MoellerWhat is the difference in functionality between these two commands. interface Vlan10 shutdown interface Vlan10 no ip address I haven't been able to find any source material, but I've seen other websites describe both commands as disabling the L3 interface for the specified VLAN. Preventing ...

03:33
1
Q: ECDSA simpler formula?

mathboiIn ECDSA, if Alice wants to send a message to Bob, she computes $s=k^{-1}(z+rd_A)$. I was thinking that the formula could simply be $s=k^{-1}zrd_A$ and the algorithm would work just as well, and the verification would be simpler, because the recipient would just have to calculate $X=s^{-1}zrQ_A$ ...

6
Q: Do doubly-transitive actions give rise to irreducible representations for infinite groups?

Kenta SuzukiLet $G$ be a group acting doubly-transitively on a set $X$. Then the vector space $V_X$ of functions $f\colon X\to\mathbb C$ with finite support such that $\sum_{x\in X}f(x)=0$ carries an action of $G$. Is $V_X$ necessarily irreducible? Is it indecomposable? When $G$ is finite, then there is an...

CS
CS
1
Q: Inertial and non-inertial frame of reference

Priyanshu Chauhanwe know that those frame of references which are in uniform motion relative to an inertial frame of reference are called inertial frame. but the inertial frame we are using for comparing will also be in unfiorm motion relative to an another inertial frame of reference and that inertial will be re...

1
Q: Memory doesn't seem to be compatible with my ASUS motherboard, how can I solve the issue?

JΛYDΞVI just bought adata memory and an ASUS Z690 ROG Maximus Apex board. The memory is ADATA XPG Lancer 6000mhz 2x16gb sticks. I can't get the board to boot to bios, I get Q code 12 for about a minute (which means that the board is trying to sync w/ the memory), then I get a Q code 55, which as far as...

03:58
1
Q: Different names for "Birchas Kohanim"

The TargumWhere did the different names for the "priestly blessings" come from? Duchaning , Birkas Kohanim, Nesiat Kapayim etc..

04:29
1
Q: Number of points on a surface modulo p

Rati SasmolI am guessing that the number of solutions $(x_1,x_2,\cdots ,x_s)$ modulo $p$ of the system of polynomials $$x_1x_2\cdots x_s=1,$$ $$(x_1-1)(x_2-1)\cdots (x_s-1)=u$$ where $u$ is non-zero modulo $p$. Is it $$p^{s-2}+O(p^{s-3})$$ for $p\rightarrow \infty$? Note: This is true for $s=4.$ Could someo...

CS
CS
1
Q: How to turn a 3D polytope into a mesh?

MakoganLet us say you have a polyotpe define as the intersection of halfplanes. That is you are given N half-spaces. The polytope is the volume defined by all points which lie on the positive side of all N half-spaces. I want to make a mesh of the surface of the polytope. I.e. find the positions of the ...

4
Q: Backing out of a signed tenure track offer? -- A complex situation

idfkwtdI have a question related to potentially backing out of a tenure track faculty offer I signed. Ideally i'd love to get feedback from established faculty or others well-familiar with the black hole of academic faculty positions and searches. I've read all the responses to similar questions, howe...

DIY
DIY
04:48
1
Q: How to attach header for a barn door to the face of columns?

judepereiraI'm trying to replace the doors for my existing closet, and had a structural doubt: while the header itself is strong (I've stood on it in the center of it), I'm trying to understand the best way to attach it to the three new columns that I'm adding, in order to support the weight of the doors. S...

3
Q: How to compare more than two groups of continuous, not-normally distributed values?

Zeno Dalla ValleI'm currently analyzing the age variable in a dataset of all italian phyisicians (~470,000 obs) and I'm trying to check if age is significantly different between three groups defined by another variable (job). There are 34,348 obs for job 1, 6,404 obs for job 2 and 432,963 for job 3. First idea w...

1
Q: "financed" process in Activity Monitor

Dennis WilliamsonI noticed a process in Activity Monitor called financed. If I turn on the Kind column it shows "Apple" but so do all the other processes. If I use the hierarchical view no parent or children are shown for it. Using View > Inspect Process I see that its parent process is launchd. If I try to Googl...

Law
Law
05:10
4
Q: What is the legal basis for judges being able to see classified material?

SimdA Twitter user called emptywheel recently tweeted I addressed this question in this post. No, Cannon does not need a clearance. Her access comes via dint of her responsibilities, just like Members of Congress who need to access classified information do. They ALSO do not get clearances. But wha...

05:53
3
Q: Indeclinables: What are the strategies good Latinists use to deal with them?

Victor BCI have read that the modern tendency is to translate a modern person's personal name into Latin but not his surname. So John Doe would be translated as Ioannes Doe. This seems sensible at face value, for people to understand who you are talking about, but it seems very complicated when you actual...

06:07
3
Q: Does Daniel 9 say Anything About an "Antichrist"?

ray grantIn a cursory reading of the last part of the chapter 9 in Daniel, one does not see any word that resembles the title "Antichrist"! Yet many prophecy books write about the Antichrist to come, spoken of in Daniel 9. Whole series of sermons are dedicated to this man in modern pulpits, especially pu...

TeX
TeX
06:26
3
Q: Drawing a basket in Tikz 3d

Matthew LouFor some mathematics project I'm trying to draw a basket as sketched in the picture below, I've gotten some of the lines of the basket in, see picture below after the MWE, however I'm still struggeling to get some of the shading right, mainly on the handle. I was looking for some shading of part...

CS
CS
06:38
1
Q: What is velocity definition?

Priyanshu Chauhanas we know that displacement is change in object position (here position means 'position vector') then velocity will be change in object position with respect to time simply displacement/time taken. but i was taught that velocity is change in displacement with respect to time, then it means veloc...

07:04
1
Q: Why Is Hydrogen in HSO3- Connected to Oxygen Instead of Sulfur?

LyborickOne of the questions in my homework was to draw HSO3-, which I thought to be pretty easy. Sulfer is the least electronegative (except Hydrogen but it can't be the central atom), hence it is the Central atom. Then I drew out the structure with the hydrogen single bonded, 2 oxygen double bonded and...

1
Q: Would it be appropriate to point out an error in another paper during a referee report?

user479223I just finished refereeing a paper in math. The paper was completely incorrect and unsalvageable. The authors (very senior) made a trivial mistake (confusing two definitions) and the rest of the paper was simply incorrect. I wrote a long and constructive report with some literature to review. Out...

TeX
TeX
2
Q: Align table exclusively to plus-minus signs without taking the decimal point into account

Yannik KI would like to align my table the following way: Arsen______0,63+-0,12__________18 +-12 Blei________11,7+-0,6__________109 +-9 As you can see, I don't want to have any space between the \pm sign and the numbers, even if some of the numbers have decimal places (the latter should be completely ign...

07:38
1
Q: Can a new theory be proven just from what it predicts?

thinkingmanIf we make predictions with a new theory, but cannot verify its internal mechanisms and causal processes, but find that the predictions turn out to be accurate every single time, is this enough evidence for the theory? Let's assume that the predictions being correct by chance/the null hypothesis ...

ELL
ELL
07:54
1
Q: Word request - Adverb for apologizing a lot?

Axuwu JumpWhat’s the word for someone who is apologizing a lot? For example, “I was ____ apologizing to them.” I thought of vigorously apologizing, but it still feels like I’m forgetting a more fitting word.

GIS
GIS
1
Q: Jitter sensitive points in a PostGIS view

ScaddenpI have sensitive location data that we want to visualize without giving away location. Clients wants points jittered everytime they are accessed. What I would like to do is store actual location, but in a view, create a geom column based on jittered coordinate and hid the real location. Is this a...

1
Q: How to create a geometry-node-based generator for columns with a custom side profile and custom amount of sides)

thael orthI'm trying to create a geometry node based generator that gives me control over the side profile of a column-like object. I tried to do this with a custom curve window (which can also be accessed by beveling an edge with a custom profile), but I don't know how to adjust the general shape (for exa...

1
Q: Is JobID same for daily running journeys in SFMC?

kuml2When we send one-off emails from marketing cloud, JobID can be used to identify the email deployment as it is unique. When it comes to journeys (in use-case where audience is entering the journey daily): Does JobID stays the same throughout the life of the journey? Does JobID changes after somet...

08:51
1
Q: Is there a good resource to find out if an industrial controls component is branded by more than one company, and who actually manufactures it?

Andrew LockeI have seen multiple components such as relays, circuit protection, plcs, terminals blocks, and even enclosures that were sold by completely different companies. Other than the writing on the device, such as model number and obviously company name; the components are identical. After some resea...

3
Q: Copper FCC structure using ASE (Atomic Simulation Environment) library in python

Akshit DhillonI want to create a FCC structure using ASE (atomic simulation environment). I have define the all the required parameter correctly but at the time when i add GPAW calculator. The output of the program says that: "Atoms are too close". Please comment on this where i'm wrong. Code from ase import A...

 
2 hours later…
10:25
3
Q: Sci-fi novel about search for immortality using nanobots while also causing a pandemic

byteflushI read this novel about 15-20 years ago, most probably somewhere online (though can't remember where). It was fairly new at the time (not older than 5-10 years). So I guess mid-90s to early 00s. It starts around our own present and goes on far into the future. People are trying to use nanobots to...

ELL
ELL
1
Q: 'clear A of B' and 'clear B from A'

ellseThis is from a news article : Crews worked through the night to clear the collapsed section of the road. Officials warned residents to avoid the area and to expect delays of trash collection and bus routes in the area. I think that 'clear the collapsed section from the road' is correct if that...

10:38
1
Q: Why is Putin translated as 普京 but not 普定?

NanningYouthThe translated name is quite different from the original in sound, and it might be attributed to the original sound of the word in the original language-Russian, but the same criterion will not apply to the case of the name of the sitting president of France, Macron(马克龙), which should have been 马...

1
Q: Why would being "almost the end of the second quarter for fundraising" be a reason for US presidential candidates not being "out there quite as much"?

uhohIn CNN's June 14, 2023 'He’s scared s***less’: Hear John Kelly’s blunt take on Trump indictment at about 08:23, CNN's Chief National Affairs Correspondent Jeff Zeleny says: So one of the reasons the candidates are not out there quite as much this week and next is because it's almost the end of t...

DIY
DIY
1
Q: What justified getting bigger vacuum pump for HVAC?

amphibientI have noticed HVAC vacuum pumps come in CFM ranging 3-10 (maybe wider). What determines whether you need more CFM, is it the size of your system (tons) or the poundage of refrigerant, the length of lineset or perhaps the vertical difference between the low and high point in your system. Can a sm...

2
Q: How to draw an image of the function g [x]?

csn899Given the known condition as the picture: Clear["Global`*"] f[x_] := Piecewise[{{1, x > 0}, {0, x = =0}, {-1, x < 0}}] g[x_?NumericQ] := x^2 f[x - 1] Plot[g[x], {x, -10, 10}] Attempting the above method cannot draw a function image The following error prompt appears this is the right answer:

GIS
GIS
10:54
2
Q: How can I label boundaries between two or more regions using their perimeter and making their names face each other?

Xavier SandovalI want to label the boundaries between different municipalities. I want to reach something similar to the image I´m attaching . I´m using the latest version of Qgis and tried many ways but without any success. So any help would be appreaciated.

4
Q: Gym Locker Combination Puzzle

peanutbutter_89Here's a problem I've been trying to solve, but I can't reach the correct answer (39 minutes). Before I can open my gym locker, I must remember the combination. Two of the numbers of this three-term sequence are 17 and 24, but I have forgotten the third, and do not know which is which. There are...

3
Q: Infimum of a holomorphic function

JohnAssume that f is a holomorphic function on $\mathbb{C}$ except at the origin. Also, suppose that $f(n)=(-1)^n$ for each positive integer n. Prove that $\inf_{z\not=0}\lvert f(z) \rvert =0$. Now, we know that $z=0$ is the only singular point of $f(z)$. There are three possibilities. Firstly, zero ...

11:11
3
Q: Is there any symbolism associated with Hebrew being written right to left?

rikitikitemboI am interested to know if there is any religious meaning associated with Lashon HaKodesh being written from right to left as opposed to left to right

1
Q: Escape from the storage maze

Ichthys KingYour girlfriend's half-brother and his friend have gotten themselves lost in a storage room in some abandoned building. Luckily, you were nearby enough to break in to help them. As you reach the storage room in question, you notice a small map scribbled on the wall, which looks like this: Unfort...

1
Q: Would a lizard-mounted cavalry be effective against pikes?

Ichthys KingWould a cavalry force mounted on giant lizards be effective against unmounted pikemen? The lizards are roughly horse-sized, with a large reptilian head which they keep down when they run. It seems that this feature would allow the lizards to push aside the pikes with their skull while only receiv...

CS
CS
4
Q: Density functional theory: logical steps from Hohenberg-Kohn theorems to Kohn-Sham equations

Kenny WongI'm trying to learn density functional theory (DFT), using Engel & Dreisler, Sholl & Steckel, Wikipedia and ChatGPT as four different sources of information. Although I have made some progress, I am struggling to grasp the overall structure of the logical argument. In particular, I am unable to w...

3
Q: Where does the name "Yiga" come from?

DraconisI've been told that the Sheikah race in the Legend of Zelda series were originally named the "Seekers"; when adapted to Japanese phonology that becomes Shiikaa which was transcribed back into English as "Sheikah". (The same happened with some other names in Ocarina of Time: the desert people were...

11:31
1
Q: Has R&D explained how super-powerful cards like Oko and Uro were printed?

AllureThese past few years, there've been several ridiculously powerful cards printed in Standard that eventually got banned in Modern or even Legacy (!). Oko, Thief of Crowns and Uro, Titan of Nature's Wrath are the biggest offenders. The two cards being in the same colors led to a Pro Tour where most...

6
Q: Sci-fi novel about guard that watches over hyperspace that is a "tube" in another dimension

byteflushI'm sorry, but I have no idea when I read it. It could be 10-20 years ago. I also have no idea where I read it, thought it was probably an e-book collection called "Polaris Sci-fi CD library" ("Polarisova SF biblioteka CD" in Serbian) from late 90s, but I guess that's not too helpful, and I'm eve...

ELL
ELL
4
Q: When do we say "on the rack" and "in the rack"?

TomWe have these example in Oxford Dictionary Remove the cakes from the oven and cool on a wire rack. The wine is stored in special racks. When do we say "on the rack" and "in the rack"? Look at my dish rack which has 2 levels Do we say "the plates are in the rack" and "the bowls are on the rack"?

12:01
2
Q: KYBER.CPAPKE: IND-CCA Security of Lyubashevsky, Peikert, Regev (LPR) Encryption

Rohit KheraThe NIST Kyber KEM spec. defines an encryption scheme, KYBER.CPAPKE, that's a variant of the so called Lyubashevsky, Peikert, Regev ("LPR") encryption scheme [1]. While LPR encryption is typically defined over subrings of cyclotomic number fields, KYBER.CPAPKE is instantiated over an $R_q$-Module...

12:31
5
Q: Maximum Size of a Wooden Sailing Vessel

LoganP98King Darien "Stubby" Shortstock, the incredibly petite king of 1600s Imperial Rathakos, has commissioned me to build him a massive flagship to lead his mighty fleet. He wants it big. Bigger than any other vessel ever built, and then some. And then more. Is there a maximum size to a wooden sailing...

12:47
2
Q: What happens if an Aura loses all abilities?

Cain GoldhardtIf an Aura loses all abilities, that would mean it loses its enchant ability. Assuming it's still attached to something, what happens to it? I would expect that the rules would say that it's put into its owner's graveyard, but they are less than clear. The state-based action that cleans up improp...

3
Q: Elemental Foundry - Quasar powered post-ferrous material fabricator

Sam KitsuneWhat is this and what does it do? (this has got to play in the background) The the belief that most matter is concentrated in galaxies is false. A relatively huge portion of the matter in our universe is concentrated there, the heaviest of building blocks having been forged in the hearts of colla...

1
Q: "ツール" meaning "nerd"/"obscure"? What is being said here?

chausiesIn a recent video by The Anime Man (Joey), he talks with a host (ROLAND), and they get to talking about anime, and how it's less stigmatized and more mainstream now. Then Joey brings up the point that there's a culture of "the more obscure the anime you watch, that's considered cooler". They keep...

5
Q: What is wrong here?

Someone - On Strike What did Chuck do wrong, other than being in an airplane?

DIY
DIY
13:16
1
Q: What brand outdoor faucet is this?

CullanI need to know what the manufacturer is of this spigot.

13:51
4
Q: Why is the cirrus yaw damper disabled during takeoff?

joshperryI flew an SR22T the other day, the first high-performance airplane I've flown and I was incredibly surprised by the amount of yaw induced during a touch-and-go, nearly causing a ground loop. After the flight I went and read about the yaw damper feature on the aircraft and learned that it doesn't ...

2
Q: tail recursive directory traversal in Rust

nohupPlease evaluate and help me understand if my attempted implementation of a tail recursive directory traversal function is actually tail recursive or not. I wrote this from my understanding that a tail recursion happens if the recursive call is the last thing done by a function. The output of trav...

14:44
1
Q: Get User ID before the user is created

supazuI'm creating users programmatically, and in some cases, they won't have an email address. In these cases, I would like to just set the email address to [email protected] where 1234 is the User ID. It's completely illogical, but is it possible to get the User ID at this point? Is there anything with...

15:23
1
Q: Cant get face project to proporly work

Dickhead_JonesI'm just trying to get this cylinder's face to snap to the box, but my efforts are futile, all setting lead to the same incorrect result. What am I doing wrong? All I yearn for is for these faces to align, but my day is in vain and pain. Every path I take leads me to this inevitable failure of an...

CS
CS
15:38
2
Q: Why are my 74F chips incompatible with 74LS?

Andrea BianchiI have a functioning electronic project I made as a hobby using SN74LS161 4 bit counters and SN74LS08 quad AND gates. I replaced the counters with SN74F161 which are supposed to be faster but have the same logic levels of LS series and yet it doesn't work with the 74LS08 AND gates. Why is that?

2
Q: Splitting differentials of a splitting short exact sequence of complexes.

BinAckerLet $0\to F^{\bullet}\to E^{\bullet}\to G^{\bullet}\to 0$ be a short exact sequence of chain complexes of vector spaces. Denote by $v_E$, $v_F$ and $v_G$ the differentials. For every index $i$ we have an isomorphism of vector spaces $\varphi^i:E^i\to F^i\oplus G^i$. My question is the following: ...

16:31
2
Q: Why am I getting different answers using different methods?

aarbeeQuestion: $\sin x+\cos x=1+\sin x\cos x,$ then A) $\sin(x+\fracπ4)=\frac1{√2}$ B) $\sin(x-\fracπ4)=\frac1{√2}$ C) $\cos(x+\fracπ4)=\frac1{√2}$ D) $\cos(x-\fracπ4)=\frac1{√2}$ Method $1$: Let $\sin x+\cos x=t,$ then $1+2\sin x\cos x=t^2$ Therefore, $t=1+\frac{t^2-1}{2}$ $t^2-2t+1=0\implies t=1$ So...

16:45
11
Q: Lowest digit addition generator

Tom EpsilonA digit addition generator of an integer n is any integer x that satisfy the equation x + s(x) = n, with s(x) being the sum of the digits of x. (We will work under base 10 for convenience.) For example, a digit addition generator for 29 would be 19, because 19 + (1 + 9) = 29. Some numbers have mo...

7
Q: Downed alien hunters recruit Earth whaling ship to catch a monster

Pastychomper thanks MonicaThis is a short story or novella, written before 1995. A crew of aliens is attempting to kill a dangerous space monster. The creature damages their ship, leaving it with reduced firepower, and ship and monster land on Earth. The aliens encounter a whaling ship and deduce what the harpoon gun is f...

ELL
ELL
17:20
1
Q: Roll a dice vs. Take a chance

HexenSageBoth roll a dice and take a chance mean test your luck. Is there any difference between those expressions? As far as I am aware, both phrases suppose an action to be taken; I can't imagine any difference between them.

DBA
DBA
2
Q: How to determine the collation of an index in PostgreSQL?

solizIn PostgreSQL 15, when an index is created with an implicit collation, the default collation used for the index is documented: By default, the index uses the collation declared for the column to be indexed or the result collation of the expression to be indexed. Indexes with non-default collatio...

1
Q: Hanger bends from out-of-the saddle efforts?

DoNuTI've just had my road bike at service because of bad shifts respectively noisy gears on small-big ratios (my lowest gears). Of course I tried to adjust it myself first but never got to an acceptable result, either bad shifts on some cogs or noise, indicating something's off here that couldn't be ...

17:37
1
Q: Workflow draft state items are published

AstleWe have items that are in draft state. When publishing it is pushed to the Web database. Where we need to check and update the configuration?

ELL
ELL
18:10
2
Q: "China's history" vs "Chinese history"

haoWhat is the difference between using "China's history" and "Chinese history"?

3
Q: What is exact code used for SVM in sklearn library? What is its criterion to stop training?

AliMI am learning SVM. I have 2 questions in mind. First, what criteria use SVM to stop training? when I search for SVM tutorials, I found some. But, in all of them, training is done for example for 1000 iteration. But in sklearn, there is no limit for it. Still, SVM in sklearn perform much faster an...

1
Q: How can I push front and back faces inward without altering the sides?

OmarenI've been stuck for a while with this modeling, this is a vape. I've watched modeling tutorials and almost the entire donut series but my head can't figure out this. In the original model; the sides are almost straight while the front and back faces are being pushed inward, creating crevices that...

18:31
1
Q: Double negation in French

wyhorgyhI tried Google translate and ChatGPT, and they both translated the two different English sentences 'we won't know anything anymore' and 'we won't know nothing anymore', to the same French sentence 'nous ne saurons plus rien'. I know that in an informal speech, the two English sentences may have s...

19:03
1
Q: Clarified butter to ghee

VicI did not cook my ghee long enough and it doesn’t have the browned toasty flavor. Can I re-cook with another stick of butter to get the toasty butter flavor

3
Q: What is the word for number "0"?

TimUnus, -a, -um means number "1". What is the word for number "0"? https://www.translate.com/english-latin says it is nulla. Is it correct?

TeX
TeX
1
Q: understanding amsmath gather environment error messages

DummyVariableI'm trying to understand the error messages when using latex without having to google them all. The following example produces 10 errors when using TexpadTeX (based on TeX Version 3.14159265 with e-TeX extensions) running in extended mode embedded in Texpad 760 (preloaded format=latex 2021.3.29):...

19:30
6
Q: Is a postincrement always done before a function call?

12431234123412341234123Consider this code: #include <stdio.h> static int g=3; static int foo(int a) { return g+a; } int main(void) { printf("%i\n",foo(g++)); } Is the output always 7 (assuming printf() will not fail)? Meaning, does the standard guarantee that the expression g++, inside the argument list for fo...

2
Q: A different way of saying "rest of"

CfourPiOI am writing a research paper where I want to say The rest of the paper is organized as follows. in the introduction of the paper. However, the word "rest" doesn't sound good as it is perceived as if I am explaining about an unimportant part of the paper. I checked some synonyms on Grammarly, b...

2
Q: How to choose the value of nbnd in Quantum ESPRESSO?

SOELHADFIHow to choose the value of nbnd in quantum espresso and what is the difference between occupations = "fixed" and occupations = "smearing"

19:48
1
Q: Getting reminders of expired activities

thoni56Activities in Cases (or even without) often have dates which serves as due dates or deadlines. In a few views (Manage Case and the case Dashboard e.g) expired activities stand out because they are rendered in red. To get more visibility of expired activities I'd like to send a reminder email to t...

4
Q: Homotopic but not equivariantly homotopic maps

KenLet $G$ be a topological (or simplicial) group, let $X$ and $Y$ be $G$-spaces, and let $f,f':X\to Y$ be $G$-maps which are homotopic as maps of spaces. In general, $f$ and $f'$ may (of course) fail to be equivariantly homotopic. For instance, we can just take $X$ to be a point and $Y$ to be any p...

GIS
GIS
2
Q: PyQGIS -> contrast enhancement on UInt16 data type is not working - cannot set the maximum value greater than 255

vpaI have loaded a raster layer with gdal DAAS plugin and would like to set a constrast enhanced rendering, but my pixel data are in the range [536, 1747] and I cannot achieve modifying the max value of contrast enhancement accordingly. I set this max via myEnhancement.setMaximumValue(1747) but look...

DIY
DIY
20:10
3
Q: How do I remove an immobile copper tee fitting in close quarters

an phuI got a pinhole leak in the body of this copper tee fitting. I tried de-soldering the connections but there is no room to pull out the horizontal pipe and the vertical pipe is held fixed by a brace. Any suggestions?

Law
Law
20:31
4
Q: To what extent a factual mistake invalidate a legal document?

TRiGDue to a "royal lives clause", Disney retains power over its districts until twenty one (21) years after the death of the last survivor of the descendants of King Charles III, King of England living as of the date of this declaration. This is interesting and tricky, as there is no such person a...

1
Q: Bond ETFs: Distribution yield vs YTM

mxkI have a hard time reconciling the distribution yield of a bond ETF and its average yield to maturity. For example, for this ETF the distribution yield is 1.8%, but the average weighted YTM is 4.5% (as I write this). I understand DY to mean: the yearly return of a single dollar invested in one sh...

20:53
2
Q: About to cut my steerer tube, can I just measure the spacers and mark at that distance?

Learning is a messI have a chimney of 3 spacers which I would like to remove (cosmetic reasons mostly). I am not sure about marking at 2-3mm under the stem's top and cutting there. A bit too much of eyeballing. I feel more confident with measuring the height of the spacers I will remove and cut this height off the...

3
Q: Selecting particular data with a particular string at-first

P PyneI have a dataset and I want to select the only data that starting with C_i (where "i" is a numeric with variability). Here is my dataset: data={"C3", "O3", "H3'", "H3", "C4", "H4A", "H4B", "C5", "C6", "H6", "C7", \ "H7A", "H7B", "C8", "H8", "C14", "H14", "C15", "H15A", "H15B", "C16", \ "H16A",

4
Q: Is there any way to justify very different levels of technological development within a few thousand miles?

wokopaImagine a continent the size of Africa. At the coasts are sophisticated cities, where people use digital technology, electric cars, and whatnot. Travel inland, across a mountain range or through a dense forest. Here there are petty kingdoms with castles, making war on each other with swords. Ther...

21:09
2
Q: Tips for taking a ferry from France (Calais) to the UK (Dover) without advance booking?

JohnnyjankoI plan to drive from Central Europe to the UK this summer, taking a ferry across the Strait of Dover (not the Eurotunnel - that's boring for children). Since it's more than 1000 km drive from my place to Calais, I really don't want to buy a ferry ticket for a fixed time, because I can't commit to...

21:36
7
Q: A way to justify interchanging a summation and integration

omegadotSuppose $$\int_0^\infty x^a \left (\sum_{n = 1}^\infty (-1)^n n e^{-2nx} \right ) \, dx$$ for all $a > 0$. I would like to interchange the summation with the integration in order to find its value but I am having trouble justifying such a change. Fubini's theorem is not strong enough to justify t...

TeX
TeX
21:47
2
Q: does the setmainfont command path support ~

DolphinI want to add some custom font into my latex build process in macOS 13.3, this is the command I am using right now: \setmainfont[ Path = { /Users/xiaoqiangjiang/.fonts/ }, Extension = .otf , BoldFont = HelveticaNeueLTPro-Md.otf , ]{HelveticaNeueLTPro-Roman.otf} when I using the full path...

22:01
6
Q: Post nuclear apocalypse novel with mutant whales, flower-controlled zombies and possibly a psycho-plague

AchiI have a memory of a novel that I did not read, but I stumbled upon it on google a few years back and the synopsis and cover stuck in my memory, so I'd really like to find it again (I stupidly didn't save it at the time). It was an older novel, probably the 80's, but might have been 70's or early...

ELL
ELL
3
Q: verb which states that you fixed an alarm

Chris_abcI'm writing a technical document about a human operator "___-ing an incoming alarm" in a system. I.e. An alarm was annunciated by the system, the operator performs some actions, and thereby ensured that the root cause of the alarm was no longer present. I want to say that the operator in this case "

CS
CS
2
Q: What is the relationship between linear momentum and kinetic energy?

Adam GluntzOkay y'all. I cannot be the the first person to notice that $ \frac{dE}{dv} = p$ (or, alternatively, that $\int pdv = E$). I futzed around with the equations a little bit to see if replacing velocity with it's definition would yield anything fruitful and I came up with this thing that may or ma...

1
Q: How do I use awk to properly extract lines from a file using numbers from another file?

DaveI'm using bash shell. If I have a file of line numbers 1 4 7 9 and another file of lines where the first element is a number followed by a string of text 1,Michael Jordan 2,Karl Malone, 3,Charles Barkley 4,Greg Anthony 5,Chris Mullen 6,Reggie Miller 7,Billy Owens 8,David Robinson 9,Shaquille O'...

22:18
2
Q: Nextflow - Process has already been used

user17657I am trying to write a nextflow script below: /* * pipeline input parameters */ params.reads = "/path/to/fq/files/" params.guide_library = "/path/to/guidelibrary/" params.outdir = "results" log.info """\ DUAL GUIDE CRISPR QC - N F P I P E L I N E =================================== ...

3
Q: How to best motivate the study of polynomials to high-school students?

FedericoWe all know how important and ubiquitous polynomials are in mathematics. However, when faced with a 14-year-old (not really in love with the subject) asking us why they should care about polynomials, answering that studying them opens the door to more mathematics is probably not the best strategy...

22:48
2
Q: How will the 2023 occultation of Betelgeuse be seen from Iran?

Snack ExchangeI was looking at the Wikipedia page for 319 Leona and I got excited to know that it will occult the bright star Betelgeuse on December 12, 2023 (It's predicted with the use of Solex application). Then I searched to find the map of this occultaion and I found this. Of course, the webpage is in Jap...

 
1 hour later…
23:54
2
Q: The chain mystery

HoledExhaustA day I was in front of this... The person was actually trying to change the tire but this chain knot keeps haunting me. The chain has crossed the frame bar... and the most unbelievable, he could manage to pass the chain through a chain loop. He didn't disassemble the chain as the next day, he h...


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