I was looking at an American machine learning patent application the other day, and it detailed many specific parts. It goes through how they label the data to solve their problem, and how they train the model. Here they specifically mention that they used the method SVM to train their model. How...

hopefully you can help me. I tried to plot a function with Tikz and Lua in the following way \documentclass[14pt]{book} \usepackage{marginnote} \usepackage{amsmath} \usepackage{multicol} \usepackage{tikz} \usetikzlibrary{trees} \usetikzlibrary{matrix} \usetikzlibrary{calc} \usetikzlibrary{positio...

I'm a programmer, i.e. agnostic to the mathemathics behind most of cryptographic scheme, but I'm trying to remediate. I'm writing this premise for any possible error or imprecision that I probably put in this question. However, I'm studying Elliptic Curve and I got to Elliptic Curves over Finite ...

I've been drawing Wonder Woman for quite a long time. Since she has a lot of bare skin, it's kinda hard to draw it without pencils, using only charcoal. Here's the reference image I'm using: Artwork by Shierly Lin. Click for larger version.

I'd like to purchase a second wheel set for my bike: to have one wheel set for road, and one for cross/light MTB, and swap them easily depending on the kind of ride I plan. My bike uses 6 bolts disk brakes, but my local shop only has additional wheels with the right specs with center locks suppor...

I am trying to calculate service area polygons using the QNEAT3 plug in tool for a project I am doing. However, I got an error before these polygons could be created. 2021-01-04T08:03:38 CRITICAL The TIN-Interpolation algorithm in QGIS is designed to work with projected coordinate system...

Let's picture a medieval world, where a tribe of viking-like mercenaries live for the thick of the fight, the blood nourrishing the ground, and the honour of the gods of war. So they are equipped, trained for skirmishes and wars. Their equipment would be viking like, for instance : Round shields...

I have an existing ceiling junction box feeding a ceiling fan (with lights) that I'm replacing with a flush mount ceiling fan (no lights) and plan to add four recessed lights controlled by a separate switch. The ceiling junction box currently has four 14/2 cables in it. (One feeding power in, t...

This seems to be a bit of a strange one: I have my equation, defined as: eqn2 = D[u[t, x, y], t] == 0.1*Laplacian[u[t, x, y], {t, x, y}] - OverVector[v][t, x, y].Grad[u[t, x, y], {t, x, y}] It is said that OverVector[v] is equal to {y,-x}, so at first I defined OverVector[v][x,y]={y,-x}. But thi...

I develop and manage an online game where users collect and trade virtual pets (it is entirely online). It's a simple game, we periodically release new pets, users collect them and get random ones, then they trade for the ones they want, and some are rare. We also do holiday events. The problem...

[Rom 8:3 NKJV] (3) For what the law could not do in that it was weak through the flesh, God [did] by sending His own Son in the likeness of sinful flesh, on account of sin: He condemned sin in the flesh, [Rom 8:3 MGNT] (3) τὸ γὰρ ἀδύνατον τοῦ νόμου ἐν ᾧ ἠσθένει διὰ τῆς σαρκός ὁ θεὸς τὸν ἑαυτοῦ ...

I have a SMPS circuit. There is a serie connected NTC at Neutral input. I know NTC is used for inrush current limiting purposes. But there is a 20ohm 2W resistor which is parallel this NTC and I don't know what is the aim for it?

This is the original text: Drifters of this world are the collectors of forgotten knowledge, lost technologies and broken histories. Our Drifter is haunted by an insatiable illness, traveling further into the lands of Buried Time, hoping to discover a way to quiet the vicious disease. This is m...

My L3 LMoP group are planning on picking up some holy water to help with zombies as they’ve heard to tales of undead (old owl well, and thunder tree), but I think they’re going to be very disappointed to find its 25Gp, but is single use, costs an action, affects a single target, and only does the...

In Cryptography, we often write as "AES has 128-bit key" and "AES provides 128 bits of security" Is there any difference between writing 128-bit and 128 bits? What is the correct choice?

I need to measure out 70 ml of liquid. I have a 10 ml measuring cylinder with a maximum uncertainty of 0.1 ml and a 100 ml measuring cylinder with a maximum uncertainty of 1 ml. I've calculated that using the 10 ml cylinder 7 times would give a 0.7 maximum uncertainty, or a 0.7/70=1% percentage u...

The code Plot[Zeta[x], {x, 2, 20}, ScalingFunctions -> "Log"] produces the following image, which is a plot of the Zeta function but the y-axis is not logarithmic. Replacing Zeta by a different function produces a logarithmic scaling on the y-axis. The scaling function Log10 and Log2 also fail....

My understanding of cp src dest is: If src is a file and dest doesn't exist, but its parent directory does, dest is created. If src is a file and dest is a file, dest is overwritten with the contents of src. If src is a file and dest is a directory, dest/src is created. I'm trying to avoid case...

I'm a US resident and I've saved > $100k cash for a home deposit. I expect to finance a home in the next 12 months. Currently the cash is split between Bank savings account and a couple of money market accounts (like FMOXX). Are there higher yield, short term alternatives for this type of saving?...

I would like to draw a compound with a hydrogen bond with the chemfig package. Usually, this is drawn with a dotted line. However, this seems not to be a standard bond for this package (i.e. it is not in the table p. 8 in the manual). Is there a simple way to do it? MWE: \documentclass{article} \...

I have an PDF of a traveller core rulebook, but I can’t seem to figure out what edition it is. There is a character sheet in the back, but I haven’t been able to find the sheet anywhere else. The cover looks like this: And the Character Sheet looks like this: Here is the copywrite page: I have...

I am trying to see if there is a way to get user-level site usage metrics for .aspx sites on SharePoint? I essentially want to see the top user of the site or site visits/time spent by each user. I know I can pull up the site usage report by clicking on the gear icon > Site Usage, but this gives ...

The most similar question I found on math.se was concerning commutativity (Why are addition and multiplication commutative, but not exponentiation?). If this ostensibly simple (but not obvious to me) question has already been discussed, please post the link and I apologize for duplicate. I am won...

The question is contained in the title. I know that for metric spaces completeness is not invariant under homeomorphisms. What happens if we consider the same problem in the category of normed spaces with continuous linear maps as morphisms?

In this discussion, it's stated: "There is a minor tractate in the Talmud called Brit Millah which lists all the people born circumcised." Can anyone point me towards a copy of this tractate (which doesn't appear in Bar Ilan's list of minor tractates) or towards other sources which contain a list...

The two powerhouse schemata of set theory are Replacement and Collection: Replacement. For every definable function $f$ and every set $x$, $f"x$ is a set. Collection. For every definable relation $R$ and every set $x$, there is a set $y$ such that for every $u\in x$ there is $v\in y$ such that $...

This puzzle was intended to be formatted as a PDF; the puzzle PDF is available on Dropbox, and a screenshot of said PDF is hosted on Imgur. If you'd like to solve digitally, there is also a template Google sheet. The referenced puzzle is available here; no knowledge of it is necessary to solve t...

Psychologists often use the general linear model with ordinal independent/dependent variables (i.e. Likert scales to measure 'levels' of a psychological trait. For example, assigning numbers to the labels: "Strongly Disagree, Disagree, Neither, Agree, Strongly Agree") Apparently, Dr. John K. Krus...

I want to array this object on Y-axis only. I make Y offset 1.00 and both X,Z are Zero. But when I do that it shows an offset in x-axis so both end circle are not match each other like the one in the image above. I also apply scale and rotation but it still the same.

My first intuition is that it should be: I scheduled a meeting for you and I to chat. But then I noticed that I would use "me" in: Patrick scheduled a meeting for you and me. and Patrick scheduled a meeting for me to chat with him. I think the reason I'm struggling is that in the first sent...

I will appreciate if you could help me with Equation $10x^2+y^2+200x=0$ . The answer key is giving foci $(-10, 30)$ and $(-10,-30).$ I am confused: ellipse equation must be equal to $1.$ Or it is in a form of a line? I tried to make it standard form: $(10(x+10)^2)/(1/\sqrt {10})^2)+y^2=0$. But th...

this MWE creates on my machine a infinite loop. Can someone explain to me why? \documentclass{article} \usepackage{booktabs,xparse} \NewDocumentCommand\hlineX{ m O{0pt} O{#2} }{% \specialrule{#1}{#2}{#3}% }% \begin{document} \begin{tabular}{|l|l|l|} \hline 1

I was just playing Dominion online, and I planned to Donate my curses at end of game. The card says: After this turn, put all cards from your deck and discard pile into your hand, trash any number, shuffle your hand into your deck, then draw 5 cards.* Since I had two buys, I used one to buy the...

I'm having an interpretational issue with the particles behavior around a straight cosmic string. Consider the infinite cylindrical universe described by the following metric: $$\tag{1} ds^2 = dt^2 - dr^2 - (1 - 4 G \mu)^2 \, r^2 \, d\varphi^2 - dz^2. $$ To simplify things, I'll write $$\tag{2} \...

Science fiction short story, I think it appeared in the 1990s/2000s. It is about a person who manages to contact hundreds and hundreds of his counterparts in parallel worlds, and in the story is hosting a sort of phone-in for his alternates (IIRC). I have a vague feeling that might have been by R...

I have been trying to obtain list of {x,y} coordinates from this code Graphics[ Line[ Table[ {r*Cos[θ*Degree] + x, r*Sin[θ*Degree] + y}, {θ, 0, 360, 360/4}] /. {r -> 1, x -> 1, y -> 1}]] Its output is I want the output to be a list of all {x, y} coordinates like what Mathemat...

I am currently in a PhD program wherein I like my advisers, but unfortunately due to the following issues I have found that I might be happier applying to another university: The university charges a $1200 fee during the fall and spring semesters which does not come out of our paychecks, and tha...

You are given a 5x5 set of lattice points. What is the minimum number of circles, which pass through each of the 25 points at least once?

Interval notation is a way to write complicated range bounds more conveniently and concisely than writing an inequality. The challenge, should you choose to accept it, is to write a program or function that interprets a subset of interval notation. In this subset, intervals are a comma-separated ...

In a game of English eight-ball pool, a set of 15 balls are arranged or 'racked' in the shape of an equilateral triangle. In order for the balls to be racked fairly, they must be arranged like so: ......R..... .....YR..... .....RBY.... ....YRYR.... ....RYYRY... R = Red Y = Yellow B = Black Cha...

I'm arranging a piece in 4/4 with a syncopated 3+3+2 Latin rhythm throughout, and am wondering which (if either) would be the better way to notate. Here's the first notation, which emphasizes these 3+3+2 groupings in both the left and right hand. Here's a recording I made of the arrangement if he...

I’m trying to write a Sci-Fi novel in one year and I’m wondering how many words I should write per week. I’m shooting for a total of ~90,000 words by the end of the year. In terms of when I can write I’ll say no Sundays, not till after 4pm on weekdays and all day from July through September. This...

Some programs notice if they are run on a real C64 or an emulator. For example, this demo from 2007 stops on VICE emulator 3.2 with the message "No VIC inside". How is this done? I found some code to identify a C128 in C64 mode, but no code to identify emulation. In particular, I would be interes...

I have a (for me) very difficult exercise, where I want to ask you guys for help as I am still a newbie on R. (But I'm getting there!) So my question looks like this: Given Bernoulli distribution with p=0.78 For each sample size n simulate r = 10,000 draws with a for loop from that Bernoulli dist...

In general I tend to use IEnumerable<> as the type when I pass in parameters. However according to BenchmarkDotNet [Benchmark] public void EnumeratingCollectionsBad() { var list = new List<string>(); for (int i = 0; i < 1000; i++) { Bad(list); ...

So most Klingons seem to refer to themselves as "[name], son/daughter of [parent's name]". For Klingon males, we know it's their father's name. But I've never been able to determine if Klingon females use their father's name or their mother's. Does anyone know the answer?

I am trying to follow along with this tutorial. I had to put its speed to 0.25 to be able to view it. In this tutorial it is shown how a cube is separated by selection, and then some part is deleted. I have taken some screenshots: I could replicate the first 4 steps, but not step 5. I have added...

Inspired by a recent challenge involving Fibonacci numbers in which OEIS was mentioned, I would like to present a challenge of creating a function that generates a wide array of different linear integer sequences, depending on user input. Specifically, the user should provide three inputs: the k...

I'm studying the Dirac equation for free particles and read that spin doesn't commute with the hamiltonian and one has to define the helicity operator to find a third good quantum number. What's the physical meaning behind that?

Saw this sign as I entered Texas earlier this week, as well as digital display boards reminding drivers to also "Drive Friendly - The Texas Way". What exactly is the Texas Way? Do Texans have some sort of special customary way of driving? I tried briefly looking up the term through Google and i...

I have a problem rotating some text in GeoGraphics. Whenever I rotate the text I am also getting a shift in the latitude. OS: Linux x86 (64-bit) FullVersionNumber: 12.1.1 As a minimum working example (taken from the documentation and simply adding a text) is the following: GeoGraphics[{Entity["...

I am not a physicist - just a curious person. We know from observation that Newton's formulation of physics is incomplete. We could suppose that, on a planet of perpetual fog, no-one would have thought to question it. Prior to discovering flight, we wouldn't have had much in the way of cosmology ...

I recently started learning topology to help me understand limits and continuity better for calculus and I am struggling with some of the definitions. What i am getting confused with is why is every set in a topology considered to be open and when talking about sets in the topology we always say ...

Given recent headlines regarding the Trump-Raffensperger phone call regarding GA election results, experts like Preet Bharara indicate criminal conduct. If this is true, What exactly would a prosecutor charge? State? Federal? Would Trump be vulnerable to Federal prosecution of the phone call a...

This is the first time in over three decades of existence that I cannot find an answer and I actually have to ask one for myself, so please accept my apologies for any formatting issues or lack of clarity. I have made a point layer using this guide https://www.fulcrumapp.com/blog/photos-in-qgis t...

I need assistance in correctly identifying which statement makes sense: Nostrae Cor Jesu Fons Sapientiae or Nostrae Cor Iesu Fons Sapientiae There is a debate that the second statement is the correct one but I am not sure. Note that the statement is used in the logo for my institution: Sacred Hea...

I wrote this valid piece code, which made me wonder if there was a name for it: public class GenericObject<T> { public T Obj { get; set; } } public class DerivedClass: GenericObject<DerivedClass> { } This leads to the capability of: var x = new DerivedClass(); x.Obj = x; x.Obj.Obj = x; x.Obj...

I've made a single photo purchase from Shutterstock back in 2012. I created an account and gave them my debit card #. I haven't made a single purchase from them since. Silently in 2018, they activated auto-renew without my consent, without notifying me via e-mail and without sending a receipt. Th...

I'm trying to remember the name of a movie in which two young men ask a dragon three questions. I remember that one of the men asks the dragon, "Don't we get three questions?" The dragon responds, "Yes, but now you have only two remaining." Or something along those lines. What movie was this f...

I can't find any way to do this for free. Is there any free virtual printer for Big Sur so that I can print webpages (from chrome/firefox) to pdf? I learned about cups-pdf and pdfwriter but homebrew doesn't seem to support cups-pdf and pdfwriter is old, doesn't work. Any pointer will be helpful.

1 Corinthians 14:2 (NIV): For anyone who speaks in a tongue does not speak to people but to God. Indeed, no one understands them; they utter mysteries by the Spirit. If someone does not speak to people but to God, isn't that the definition of prayer? If so, is 1 Cor 14:2 supporting the practice...

It's the Great War, and all the nations are having a good time of it, painting their biplanes flashy colours, as they shoot into their own propellers! But over in the corner, lonesome and dejected, the centaur nations had no planes at all.... They can't fly anywhere, they don't get to put on gogg...

Background Given some random array of numbers like [3, 5, -4, 8, 11, 1, -1, 6] and a target value 10 Find two numbers within the array that equal to the target value. Code def two_Number_Sum(array, target): unique_number_set = set() for num in array: required_value = target - num ...

My boss (early 60s, former department chief, male, Tokai Region) often uses "(noun)+願います" in written requests like this: 翻訳願います ご確認願います. I haven't come across it before and can't find info online due to the overly similar standard "お願いします". I understand what it means, but what is the nuance? Is...

Is it consistent to say something like "Possibly there is a cat in my room, but in fact there is not"? Basically, is it consistent to assert that something is possible but in fact not the case?

Nearly all Japanese verbs are classified as either transitive or intransitive. However, I am wondering if there are cases where one can use an intransitive verb in a transitive way, especially in a humorous, poetic, or philosophical context. For example: the verb 「死ぬ」is intransitive, as is the verb

I would very much like to recreate a workflow I commonly use in Cinema 4D, which is this: Duplicate multiple instances of an object using the Mograph modifier (similar to the Array modifier) Randomize the offset/scale/rotation/etc of all the duplicated objects using a Randomize effector From ...

There are plenty of famous interspecies couples throughout Sci fi and fantasy. Personally I like this trope because I am a sucker for science fiction that deals with the possibility that we can get along with each other, I am a sucker for romance, and I firmly love the idea of love conquering al...

Question: What is the probability of getting all of the face cards in one pile when a standard deck of cards is split into two piles? Additional info: Generally a deck of cards is split into two by putting cards in two different piles one card at a time in an alternating fashion until the entire ...

I'm running Ubuntu 19.04. I recently needed to install a browser other than chromium or Firefox in order to play a flash video. I've now ended up with a much more complicated problem. Every time I try to do something with dpkg, I get an error code like: dpkg: error: dpkg frontend lock is locked b...

I heard that Xchacha20 works like a block cipher, so that even if it wants to encrypt one byte, it will do the work of at least one block. So technically it works similar to a block cipher in counter mode. I want to find out the size of this block, which represents the minimum work that Xchacha2...

FIDE has its Laws of Chess which have governed over-the-board chess for almost 100 hundred years. During the Covid pandemic OTB chess has almost stopped in many countries and more and more chess is being played at a serious level online. Some federations, which have had to cancel their regular na...

I've always been nagged about the two extremely non-obviously related definitions of conic sections (i.e. it seems so mysterious/magical that somehow slices of a cone are related to degree 2 equations in 2 variables). Recently I came across the following pages/videos: This 3B1B video about ellip...

Whips are senior legislators who enforce what is called "party discipline", but how do they do it, exactly? What is their job? To verbally shame those who don't adhere to the "party line" and vote as they please? An official of a political party appointed to maintain discipline among its members...

My young daughter is excited about photography, so I bought her an entry level camera for her birthday. There are two problems: (1) She likes doing close up pictures, and the camera is a fixed focus one. (2) I don't know how to determine what standard the threads on the camera are. The camera is...

I know in StockFish if you type "d" you get an ascii view of the board and a FEN string for the current state. Is there any command in other UCI engines such as Rybka 4 that will output a FEN string?

From TVTropes article Invisibility Cloak At the bottom of the page there is a short clip from some animated show, featuring characters from several franchises. There's Doc and Marty from BTTF, Dr Evil, Hermionie, Doctor Who (I think), and I don't recognise the others. What show does this come from?

How do you pronounce 1273 here? One, two, seven, three? Efficacy and Safety of the mRNA-1273 SARS-CoV-2 Vaccine Published: December 30, 2020 Source: New England Journal of Medicine

Should you sump fuel tanks when the fuel system is below freezing? the question should one sump fuel-tanks before flying, if in freezing-conditions? but this implies another question that boggles me: Why don't aircraft have "fuel polishing" systems, to remove water from tanked fuel, especially ...

I have the following data in the format of {x1,y1,z1}: {{0.05, 0, 2.09412}, {0.1, 0, 2.00505}, {0.15, 0, 1.8692}, {0.2, 0, 1.70208}, {0.25, 0, 1.51965}, {0.3, 0, 1.33654}, {0.35, 0, 1.16343}, {0.4, 0, 1.01005}, {0.45, 0, 0.883653}, {0.5, 0, 0.792333}, {0.6, 0, 0.794668}, {0.65, 0, 1.0845...

I am trying to achieve the following: when I press a combination of keys, let's say Ctrl+f4, I would like to end the application called "Matlab". I have downloaded AutoKey and tried the following but to no avail... #IfWinActive EditPlus - ^w::Send ^{F4}

Is it mandatory for users to have admin access to be able to use the Sitecore Form Module? I have a user with Sitecore Client Authoring role and Analytics Maintaining role, but the user is not able to see the Form Module in the Launchpad. Is any other role specific to Forms required?

My GF insists it's the Sensei guy who sabotaged Daniel in Karate Kid 3. Clearly it's a person from Kreese's past, and the show doesn't have a problem bringing back any character from the KK universe. Does anyone know who that guy is?

Stack Exchange doesn't know how to transpose tables. Let's help. Given a markdown table, transpose it. Input assumptions: There will be at least two rows (including header) and two columns Either all cells have no leading space or all cells have exactly one leading space (you must handle both) I...

I was reading Sakurai's book and here is an extract: In classical physics it is possible to keep track of individual particles even though they may look alike. When we have particle 1 and particle 2 considered as a system, we can, in principle, follow the trajectory of 1 and that of 2 separately...

Consider the dehydration of the following molecule with conc. $\ce{H2SO4}$ at $443 \text K$: The possible products are: The first one is the Zaitsev product and the second one Hofmann product. Which compound is the major product? There are 2 factors to consider here: Zaitsev product is more ...

This happens a lot on older consoles than this, but for this specific example, I'm picking what I spotted today: Harvest Moon for PlayStation. Here is a screenshot of the player just about to exit an area, thus causing a "fade to black": Here is what it actually looks like halfways (or 75%) fini...

I am applying for a PhD position in computer science in Europe. They specify a start date but say that it can be negotiated. Due to other circumstances, it is not possible for me to start until a month and a half after their given start date. I see two options on what to do now. Either I say so a...

All of the tube amp designs i see have the tubes exposed to air. Is this a design feature for heat dissipation or is it simply because some find it pretty?

We handle arbitrary user input and attempt to programmatically generate LaTeX for compilation. One issue we sometimes run into is users writing very long lines (paragraphs) of text, resulting in an error: ! Unable to read an entire line The sensible — but potentially naïve — solution seems to be...

On page 130 Alfred's Level 2 book is a sample of Augmented Chords, but for any chord which should have the middle note sharped, the middle sharp is dropped when converted to Augmented. I've looked on the internet, and everywhere else this does not happen. Alfreds gives A Aug as this: A, C, E#. T...

My opponent, in their turn, was distracting me making annoying sounds. When I called the arbiter, they said that I should wait until it's my turn. Is this correct?

I found interesting discussion here and tried the solution given with sed How to insert a text at the beginning of a file? https://stackoverflow.com/a/9533736/13353532 It works with normal text, but not when the text is saved in a variable. wolf@linux:~$ cat file.txt 1 2 3 wolf@linux:~$ Add ...

Way back in the 1960's I regularly got DC comics and in particular Superman. There was one story where I can only recall a few squares of the comic strip. For some reason something had been done to Lois Lane and she needed to breathe liquids, however she could function as normal for 4 hours (6 ho...

I've added .125 inches bleed to my A4 document and saved as High quality print from Illustrator. Now if you see, top and bottom has some empty space. I know I could extend the image fully to bleed marks like I did on left and right (doesn't mean I haven't extended image on top and bottom. I did ...

While reading papers on my research topic I came across multiple paper formulating sentences similar to this: Because of the hypothesis-generating nature of these analyses, no correction for multiple comparisons was performed. I am a bit confused, what makes an analysis hypothesis-generating? I...

I’m wondering about the sense of entraîner in the following passage: Édouard avait quand même l’air d’une fille, combien de fois elle [the sister of Édouard] l’avait entraîné à rire « normalement » It seems to me that entraîner could plausibly be translated by either encouraged or coached, but ...

My US passport expires 16 days from now. I would like to enter the USA from Germany (which is where I spent the holidays). Will I be able to travel despite the near expiry of my passport?

I have a column of phone numbers in that are in different formats. I want them all to be in this format 0000 000 000. What I do now is manually edit each wrong number into the correct format. How can I use a filter or conditional formatting to find all numbers that are NOT in this format (#### ##...

The President of the US Senate (which is the Vice-President ) is responsible for presiding over the electoral college's votes formally in a Joint Session of Congress. However, what if the Vice-President dies before he can do so? I would imagine the President would nominate a new Vice-President, w...

I have heard all the names of English city names ending in CESTER pronounced as STER but I wonder if it is a "rule" and I should pronounce all of them as STER? Gloucester, Leicester, and Towcester all have STER.

I understood apache 2.0 is not compatible c gplv2, but openjdk use gplv2 with cpe. Apache 2.0 allow linking CPE allow linking. So i can use it together without modification code of openjdk: openjdk (GPL v2 + CPE) and Spring (Apache 2.0)? Or can i use openjdk under gplv3 + cpe, cause gplv3 compaib...

When playing a chord, be it with the right hand or the left, I'm really having trouble hitting all keys together reliably. I will often have a little audible delay between the individual notes. I practice regularly, but I have yet to find a specific method beyond repetition. Is there an exercise ...

A valid password for the bank's website consists of 8 characters (digits and letters in English) and must contain at least one digit, at least one small English letter,and at least two capital letters. How many legal passwords are there? I did 4 sets $|A|$ = number of ways for no digits appeari...

In this talk delivered by professor N. Trefethen it is stated that the condition number of a Vandermonde matrix of degree n verifies: $$\kappa\sim(1+\sqrt{2})^{n}$$ It is based on this paper by Gautschi. Unfortunately, I do not have access to that paper. How can I justify this approximation ?

I am using M12.0.0.0 on Ubuntu and I have these two plots: plot1 = DensityPlot[Sin[x y], {x, -2, 2}, {y, 0, 4}, PlotPoints -> 80]; plot2 = Plot[Sin[x], {x, -10, 10}, Frame -> True]; when I export these plots as png the FramTicks disapear! here is plot1 as seen in the MMA notebook and this how ...

I found this term in Scrypt's paper. I have several questions about its meaning, ranging from how to parse it, to theoretical bounds: Q1: How to parse it? Is it read (sequential memory)-hard? Or sequential (memory-hard)? Q2: What does it mean? Does it mean that as space is linearly reduced, t...

Are there any filler plates for Square D 'QO' panels that would take up 2 or more spaces? I am aware of the QOFP from Square D but it is just for a single space: That's all I can find. I would have thought a 2-space blank would be an obvious thing to exist... and possibly SQ makes something else...

I have a Square D QOC series main panel (QOC 40MW225). I'd like to add service entrance barriers to this panel - the plastic covers which protect from accidental contact with the connection lugs of the main service entrance cable. I take it that newer panels these days typically come with a barri...

tail command in current Linux has --pid option to terminate after certain process id, while tail under MAC OSX doesn't have the same option. e.g. tail -f --pid=<process_pid> can terminate tail mode if process_pid terminated. So how can we get the same result as Linux tail -f --pid?

While replacing the cable for my front disc brake, I lost the bolt and plate that attaches the cable to the calliper. In this Park Tool guide, they call it a 'pinch bolt' — labelled E in the image below. Unfortunately, searching for 'pinch bolt' doesn't come up with any parts that include the met...

I looked up the etymology of "father" and see what Etymology Dictionary says: Old English fæder "he who begets a child, nearest male ancestor;" It clearly says "fæder" with a D. Wikitionary also has the D version: From Middle English fader, from Old English fæder, from Proto-West Germanic *fad...

How to make this faster? I want to remove elements that satisfy the condition below but it's way too slow. tup1 = Tuples[{{0, 1}, {-1, 0, 1}, {-1, 0, 1}, {0, 1}, {-1, 0, 1}, {-1, 0, 1}, {0, 1}, {-1, 0, 1}, {-1, 0, 1}, {0, 1}, {-1, 0, 1}, {-1, 0, 1}}]; tup2 = DeleteDuplicates[ tup1,...

I'm currently reading the paper Federated Learning with Matched Averaging (2020), where the authors claim: A basic fully connected (FC) NN can be formulated as: $\hat{y} = \sigma(xW_1)W_2$ [...] Expanding the preceding expression $\hat{y} = \sum_{i=1}^{L} W_{2, r \cdot } \sigma(\langle x, W_{1,\...

Consider the limit $$\lim_{n\to +\infty} \frac{2^{\sqrt{n}}}{n!}\left(\frac{n}{e}\right)^n.$$ How to show that this limit is $+\infty$? I just tried square criterion but it doesn’t work. Moreover, Stirling’s formula is not allowed (requested in the assignment). Could anyone please help? Thank you...

Amartya Sen (1992) argued that there were more than 100M "missing women" worldwide. In "Hepatitis B and the Case of the Missing Women" (2005), Emily Oster argued that hepatitis B can account for about 45 percent of the “missing women”: around 75 percent in China, between 20 and 50 percent in Egy...

I am using many times matrices that have only one row or one column. For example: \begin{pmatrix}1 \\ 2 \\ 3 \end{pmatrix} \begin{pmatrix}1 & 2 & 3 \end{pmatrix} So I figured it will be useful to shorten the expression with a macro or a newcommand. So far I am failing but I don't undestand why...

How can I find the cost function c(w,p) given that the production is $f(x) = x_1+x_2$ I did Lagrangien's method but my problem is that I got no $x_1$ and no $x_2$ after taking the derivate. So I would like to know how can I derive a cost function? Thanks in advance !

This morning I decided to make some eggs. I cracked open the first egg and it just all sort of splashed out onto the pan, the yolk already liquefied and the whites with this yellowish-greenish hue. It I cracked open a second egg to see if the whole carton was like that, and it came out just fine,...

Hi I want to prepare a SharePoint 2016 Intranet farm with Workflow manager, Now I have 2 Servers, and I have plan to use one for SharePoint 2016 and Second for Workflow manager. My question is later can I install SharePoint on Second workflow manager server if it required?

The following Javascript is embedded into a Visualforce page because it relies on Visualforce variables: <apex:page controller="myController" > <script> var foo1 = '{!URLFOR($Asset.SLDS)}'; var foo2 = '{!JSENCODE(bar)}'; bar(foo1, foo2); </script> ...

This propeller i modeled has wrong shading on the tip of the blades, like if there are sharp edges but there aren't. The vertices are all connected, the normals are calculated correctly like u can see in the screenshot. I tried splitting it on the wrong shading line and rejoining them, but even a...

Not a plane or a sphere. Like the attached blend file. Either, for example, white at both ends, black in the middle or black at both ends, white in the middle. A gradual gradient from one to the other side, linear from left to right, up, down, doesn't matter, or from the outside of the object in,...

Is it possible to place 4 players on a football field in such a way that the 6 distances between every pair of them are 1, 2, 3, 4, 5, 6 meters? Source: Moscow Math Olympiad 2001 (Look Inside to Page 8, see Problem 1 under Level B)

The Park Tool website has a page describing the standardized headset identification system. I would like to confirm that I've understood it properly. Is this bottom section of a press-fit headset shown in the picture a ZS56/40? NOTE: I've taken measurements with inexpensive digital calipers and ...

If I copy and paste the following command on a terminal it works as expected: uxterm -e "bash -c 'while : do xdotool getmouselocation; sleep 0.3 done'" The following desktop entry works as expected as well: [Desktop Entry] Version=1.0 Name=getLocation_v1 Comment=Test the terminal...

Just before christmas my car died while my girlfriend was on her way to work. She told me that when the car stopped it went completely silent (no engine/lights/music). Since she drove for about 15km (mostly highway) before that happened I suspected a problem in the realm of generating electricity...

What series of events would specifically need to occur tomorrow January 6 (when Congress Counts Electoral Votes) so that the election is overturned? I know there's a remote possibility something may happen because mayor newspapers that would seldom report on Trump after the elections are now cove...

I recently cast a concrete countertop using melamine moulds. Overall, I'm happy with the cast slab but the colour turned out different than what I was aiming for. I was using white cement, aiming for a white-ish finish but the sand I used caused more discoloration than I expected so it ended up l...

Hello I am needing some guidance on Latin. We are rebranding our record label and we are passionate about giving back to the community. We have found the term Donandi and like it for our record label. We would be called Donandi Records. I can not find much online to help me see if this is an "ok"...

I was looking at this picture and I do not understand why that one point (the one I drew an arrow at) gets classified with K = 1 and K = 5 in a blue area. For K = 1 the nearest neighbor should be the green one, definitely not a blue one and for K = 5 I can see 3 green points, 1 red point and mayb...

I am designing a circuit where I have a microcontroller driving a 4 channel logic level N mosfet module. The simplest way for my circuit to work is to have the microcontroller run "HIGH" on the mosfet gate for extended period of time (1 hour on for every 10 seconds off). Assuming the heat dissipa...

If I put English Ivy trimmings in the bottom of a raised planter will they grow back and invade it? I am talking roots as well as the above ground plants. The plan is to use them as filler underneath soil and compost in the pictured raised planter. The planter is 40cm deep. To be clear I don't wa...

The retroflex r is not the consonant r in a word (pinyin) like in 人 rén. The retroflex is added as suffix in Beijing area, or as a diminutive suffix. Would it be pronunced with the second tone, because 儿 is pronunced ér ? or would it be pronunced like the previous syllable ? like in 哪儿 it would ...

Deep in space a colony ship continues to accelerate unaware of the volley of railgun rounds hurtling towards it. As the light from the attack reaches the bridge the PDCs (Point defense cannons) are brought online and set to intercept the rounds. Unfortunately the ship is so massive and has accele...

I have noticed that default kerning of hyphenated words (like "Finite-Valued") looks like this: e-V As you can see, the hyphen is too close to the e and too far away from the V. Is there a way to fix this, so the hyphen has proper kerning?

I plan to install a whole-house surge protective device (SPD). Its instructions state that you should place it as close as possible to the connection of the mains with the busbars. Also it has a neutral wire which is supposed to be made as short as possible. My panel already has a backfeed breake...

I have a $n\times n$ matrix, every entry is of the form Function[{t},expr] How do I get from that a function M[t_]$\colon\mathbb{R}\longrightarrow\mathbb{R}^{n\times n}$? I made some experiments with Evaluate but all I got was a matrix of pure functions. And MatrixForm[M[1]] was evaluated to (......