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00:01
3
Q: Does an advisor owe his/her student anything? Will an advisor keep a PhD student only out of pity?

appartI know what imposter syndrome is. But, believe me that's not the case with me. I have worked hard for the 4.5 years of my PhD, but I feel that my research is absolutely mediocre and as a result my self-confidence has taken a toll. Now, my advisor is a brilliant person. She is well known in her f...

1
Q: What is the highest possible scrabble score for placing a single tile

user3294068What is the highest possible score a player can make in a turn by placing a single tile? Assume language is English, using standard Norh-American rules.

5
Q: Can I turn my anal-retentiveness into a career?

John DoeWhen I'm reading something, I immediately pick up on typos, grammatical errors, misuse of punctuation, and the like, as well as better ways to phrase things. I have no formal education in any sort of writing or English other than GE; my education is in engineering. Is there some way to monetize...

00:25
2
Q: What would sports be like in a dystopia?

VakoreI remembered Ready Player One's dystopian setting, and then wondered what would sports be like in a dystopia? This theoretical dystopia is a world that has been drained of most of its resources, like Ready Player One, except no super-good Virtual Reality like Ready Player One, and all sorts of c...

00:42
2
Q: Is my low blitz game drawing rate at www.chess.com an indicator that I am weak in chess?

ZurielI have played 630 blitz game at chess.com and only 10.3% of my games are draw; see the diagram. When I play black, my drawing rate is slightly higher than my drawing rate playing white. This is likely because that psychologically I am more content with a draw when I am playing black. I unders...

00:53
4
Q: Does the Linux kernel need a file system to run?

Peter L.My opinion is yes, it does, because all useful exposure to the outside world (non-priviledged processor mode) would first require a process running in the outside world. That would require a file system, even a temporary, in-RAM, file system. Another engineer disagrees with me, but I can't seem...

01:49
3
Q: Why does this expression simplify as such?

DavidI'm reading through my professor's lecture notes on the multiple linear regression model and at one point he writes the following: $$E[(b-\beta)e']=E[(X'X)^{-1}\epsilon\epsilon'M_{[X]}]. $$ In the above equation, $b$, $\beta$, $e$, and $\epsilon$ are all vectors, $X$ is a regressor matrix and $...

02:18
1
Q: It grows, but water kills it

XilpexHere is a fun riddle: I am not a living thing, but I can grow. I don't have lungs, but I need air; I have no mouth, but water kills me. What am I?

02:52
1
Q: Is there a way to have vectors outlined in a Vector Plot?

jeanquiltI am using the following code to make a 3D vector plot. VectorPlot3D[{ x (1 - x) - x*y, y (1 - y) + x*y - y*z, z (1 - z) + y*z}, {x, 0, 1.2}, {y, 0, 1.2}, {z, 0, 1.2}, Axes -> True, AxesLabel -> {"x", "y", "z"}, VectorColorFunction -> "Rainbow", VectorScale -> {0.05, 0.7, None}] Th...

RPG
RPG
03:07
3
Q: How many arrows is an archer expected to fire by the end of the Tyranny of Dragons pair of adventures?

AxorenTyranny of Dragons spans two supplements: Hoard of the Dragon Queen Rise of Tiamat If an archer was expected to buy all of their arrows up front, what is a reasonable estimate of how many arrows they would need throughout the coarse of a full Tyranny of Dragons campaign? Assume that we are n...

03:20
2
Q: Strong empirical falsification of quantum mechanics based on vacuum energy density?

sidharth chhabraIt is well known that the observed energy density of the vacuum is many orders of magnitude less than the value calculated by quantum field theory. Published values range between 60 and 120 orders of magnitude, depending on which assumptions are made in the calculations. Why is this not universal...

3
Q: Were Persian-Median kings illiterate?

DonielFIn the Megillah, we read (6:1): בַּלַּיְלָה הַהוּא נָדְדָה שְׁנַת הַמֶּלֶךְ וַיֹּאמֶר לְהָבִיא אֶת־סֵפֶר הַזִּכְרֹנוֹת דִּבְרֵי הַיָּמִים וַיִּהְיוּ נִקְרָאִים לִפְנֵי הַמֶּלֶךְ On that night, the king's sleep was disturbed. He said to bring the book of chronicles, and they read it befor...

03:40
6
Q: Fantasy comedy romance novel, set in medieval times, involving a siege, a nun, and enchanted pickles

FuzzyBootsI read this around 2015, I think, as a Kindle book. Sadly, I have quite a history of books to work through. The protagonist was a nun, not quite at final vows. Her monastery was known for its pickles. At the beginning of the book, she'd failed to properly monitor a batch, and it had moulded. Desp...

6
Q: Short story about a deaf man, who cuts people tongues

AkashaI'm searching for a short story I read a long ago in a different language. It was listed as a story by Ray Bradbury, but I can't find it in his bibliography. I've checked every title, that is even remotely related to the plot, and couldn't find it. And the style is not exactly like his. It's very...

04:32
3
Q: Why does the Sun have different day lengths, but not the gas giants?

AllureThe Sun's rotation period varies from about 25 days at the equator to about 38 days at the poles. As I understand it, this is because the Sun is not solid, and because of the way centripetal force works, the equator must move faster than the poles. Question: if this works, why do Jupiter/Saturn/...

04:46
3
Q: Why do some congregations only make noise at certain occasions of Haman?

Deborah SavageAttended a Purim Seudah tonight at a Sephardic shul where most of the attendees are Israeli. They only made noise during three (maybe four?) times Haman's name was mentioned. I am aware of the teshuva saying "no noise", but can't find anything explaining "sometimes." Is there a soource for this...

05:29
3
Q: Can a stoichiometric mixture of oxygen and methane exist as a liquid at standard pressure and some (low) temperature?

uhohThis answer to the question Pre-mixing cryogenic fuels and using only one fuel tank written by a non-chemist (me) begins with: At STP: LOX's boiling point is 90.19 K Methane's freezing point is 90.7 K This does not a priori prove that a solution of the two can not exist. Ho...

05:59
2
Q: Showing a sum is positive

Hitendra Kumar Show that the sum$$\sum_{k=0}^{n} {n \choose k}\frac{{(-1)}^k}{n+k+1}$$ is a positive rational number. It is easy to show that it is a rational number. But I am having trouble showing that this expression is positive. It might be some binomial expansion that I could not get.

06:25
3
Q: Plot of a tornado shape like surface

janmarqzWhich will be a simple code to plot a shape of a surface tornado like cone? Any help is welcome.

3
Q: How to create a paid keyvalue store

thewonderedI'd like to create a contract through which people can set publicly available key=value information in exchange for some Ether sent to me (the owner of the contract). This is to create a public decentralized database on which anyone can read and write, and the Ether cost would be to limit spam. ...

GIS
GIS
06:58
2
Q: Making grids in QGIS

jake9wiIn QGIS I am trying to make a map with the Maidenhead Locator System overlayed. I am making these overlays with QGIS's create grid tool but the grids are not coming out right. If I leave the map unprojected the bigger and smaller grid lines are parallel but any projection I use they are not para...

DBA
DBA
07:16
2
Q: Why does a simple loop result in ASYNC_NETWORK_IO waits?

Joe ObbishThe following T-SQL takes about 25 seconds on my machine with SSMS v17.9: DECLARE @outer_loop INT = 0, @big_string_for_u VARCHAR(8000); SET NOCOUNT ON; WHILE @outer_loop < 50000000 BEGIN SET @big_string_for_u = 'ZZZZZZZZZZ'; SET @outer_loop = @outer_loop + 1; END; It accumulates 532 ...

 
1 hour later…
08:35
2
Q: Dative vs Accusative

Mun WaiI was doing some dative preposition exercises to familiarize myself with how they use it in german. I came across this sentence Ich spreche mit meinem Bruder Why is it "mit meinem" and not "mit meinen"? Ain't I speaking directly to my brother? PS : Just started learning not too long ago.

08:55
3
Q: Birthday Problem Paraphrased

Cedric SunThe following is an excerpt from A Generalized Birthday Problem - David Wagner: One of the best-known combinatorial tools in cryptology is the birthday problem: Problem 1. Given two lists $L1, \space L2$ of elements drawn uniformly and independently at random from $\{0, 1\}^n$, find $x1 \in...

RPG
RPG
09:13
9
Q: What is the duration of the spell Creation when used to create non-precious metals?

dog_muI was looking at the description of the spell Creation in 5th Ed, and saw a gap. It lists the duration for "Precious Metals" but not for other metals. I thought it might be the same as stone and crystal, since they're mentioned together.

09:30
12
Q: Why does Java 12 try to convert the result of a switch to a number?

IlyaI agree that this code: var y = switch (0) { case 0 -> '0'; case 1 -> 0.0F; case 2 -> 2L; case 3 -> true; default -> 4; }; System.out.println(y); System.out.println(((Object) y).getClass().getName()); returns this: 0 java.lang.Character But if you remove boolean: var y ...

2
Q: risk of flooding in petra in november

neubertMy tentative plans have me in Egypt from November 12 - November 23. I was thinking it could be cool to visit Petra before hand. Maybe like November 9 - November 11 or some such. The concern I have with this is... last year, on November 10, Petra flooded and a bunch of tourists died and a bunch ...

ELL
ELL
09:47
1
Q: xxx we would have made had we used xxx, what is had used for?

MithrilIn https://peerj.com/preprints/3190.pdf section 4.3 SHFs simulate the errors we would have made had we used this forecasting method at those points in the past. The meaning I could understand is change had to when, like SHFs simulate the errors we would have made when we used this forec...

3
Q: Open a doc from terminal, but not by its name

yh yeahnoob question here. Is it possible to open a file from the terminal not by its name but by its (number) position in the folder? Or any other option? Because the name is too long.

10:09
7
Q: Find all subarray with sum equal to number?

user944513Could you please tell me how to find all subarray with sum equal to number Example arr[] = [2, 4, 45, 6, 0, 19] x = 51 Output: [2,4,45] Or arr[] = [1, 11, 100, 1, 0, 200, 3, 2, 1, 280] x = 280 Output: [280] I tried like that but not getting correct output function getSubArray(...

TeX
TeX
10:29
4
Q: How to align my equation to left?

choleI want to display four equations which have different length. I want they align left like this. But my code give this The following are my code: $$\begin{aligned} p(a) &=p(a) p(a \rightarrow a)+p(b) p(b \rightarrow a)+p(c) p(c \rightarrow a)+p(d) p(d \rightarrow a) \\ &={\scriptstyle \frac{1...

RPG
RPG
10:48
2
Q: What if a revenant (monster) gains fire resistance?

Robin ElzeardAs a GM, I use some revenants for my campaign. Those revenants all have class abilities and 2 are spell casters (an abjuration mage and alchemist artificer). The "problem" (it's not a problem, but an "and what if they do that?") is that they can use the Protection from Energy spell, so they can h...

2
Q: Are these expressions not equal? Mathematica output is ambiguous

user120911The following plot indicates that the first expression equals the second. But how can I use Mathematica to show that is true: Plot[(-(Log[(1 - P)/P]/Log[10])) - (Log[-(P/(-1 + P))]/Log[10]), {P, 0, 1}] An attempt to simplify indicates the expressions are not equal: FullSimplify[(-(Log[(1 - P)...

6
Q: This is why we puzzle

PiIsNot3What kind of puzzle solver are you? Let’s map it out! 1 Nail item before each paper item (7) After shooter’s return, receive big chunk (6) Encourage bone disease (4) Lost charge of gold and silver - lies! (4) Theater costume’s warmth (4) 2 3 “Gotcha!” guy (6) LSD part...

11:06
3
Q: Refactor a hash table solution to twoSum

AliceI try the most to solve a twoSum problem in leetcode Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Example: Given...

GIS
GIS
1
Q: Why is short-wave infrared portion of electromagnetic spectrum so sensitive to fire?

Robert BuckleyAfter attending a remote sensing workshop and using Copernicus data to monitor natural disaster scenarios, my question could not be fully answered by the instructor. All that was said, was that is in no way associated to thermal IR. What property does fire have, that makes is visible with short...

1
Q: How should you respond if you lied about your education and your company finds out through background check?

Isaac WrightI lied about my education to my employer and background check revealed I did not graduate. How do I respond to my employer after they send me the following? In order for us to move forward and complete the background check investigation, we need to understand the reason for the discrepancy an...

11:29
3
Q: Angel of Condemnation - Exile creature with second ability

QBruteI was looking at Angel of Condemnation's second ability and couldn't figure out what would happen if you exiled a creature an opponent controls but is owned by you? The first ability explicitly states that the exiled creature returns under its owner's control, but there's no such thing in the se...

4
Q: X marks the what?

jafeIn the following clues, a certain term been replaced with $X$. Find out the meaning of $X$ and solve the crossword. Down Deadly $X$ (5) White heroine or cocaine (4) Introduction of good old $X$ (4) Across $X$ in screwy nail is $X$ object (5) $X$s scrapped behind en...

12:03
6
Q: Can disgust be a key component of horror?

LiquidThe feeling of disgust is often used in horrors, exspecially visual medias (where is arguably easier to shock the audience with great effect). Often horror stories revolve around one scary element (a villain; a monster; a disease) that carries along a lot of repulsive traits. The alien in Alie...

4
Q: What are these little yellow boxes at German pedestrian crossings?

Pete LeamanI've been to Germany twice now: Once to Berlin and once to Bielefeld. Both places had these yellow boxes with the same pattern at pedestrian crossings. At first I thought they were to press for crossing, but there doesn't seem to be any way to actually press them so I'm confused as to what th...

12:38
1
Q: Does the UK parliament need to pass secondary to accept the Article 50 extension

Drifter104Given the following The Miller Case established the need for Primary legislation to be passed within parliament to trigger the Article 50 notification. Which it did in the European Union (Withdrawal) Act 2018. It stands to reason that parliament would need to pass secondary legislation to chang...

1
Q: Dark corner in image using Sigma 85mm F1.4 EX DG HSM

Ajit Susing Sigma 85mm F1.4 EX DG HSM with canon 80d, dark circle appers in image if i shoot at 1.4, above 1.6 it doesn't appear in image but show in live view. No hood no filters used, issues with this lens only other Lenes works fine.

ELL
ELL
12:58
3
Q: How to say when a application is taking the half of your screen on a computer

CedWhen using a computer I know when the application is taking the entire screen we call it "full screen" or "your application is in full screen mode". And so how is it called when a application is taking half of the screen (in order to display 2 applications for instance one on the left and one o...

9
Q: Why does int i = 10; i / 0; compile, but 5 / 0 gives CS0020 - Division by constant zero?

NickConsider the following snippet: int i = 5 / 0; This gives compiler error CS0020: Division by constant zero, which is fine. However, the next snippet: int i = 10; i = i / 0; Compiles just fine. Does someone know why? I see no reason why the compiler allows an integer variable to be divide...

13:16
2
Q: Why can Carol Danvers change her suit colours in the first place?

Peter MAfter reading Why does Carol not get rid of the Kree symbol on her suit when she changes its colours? and this excerpt from the accepted answer: As mentioned above changing the colour of the suit sends a strong signal that she's changed alliances and so changing the symbol wasn't actually nec...

11
Q: isn't the "if" redundant here?

TheOrlexxHere is the example: if (value != ageValue) { ageValue = value; } I mean, if we assign the value of a variable to another one, why would we need to check if they have anyway the same value? That confuses me. Here is the broader context: private double ageValue; public double Age { ...

1
Q: How to copy file from a list to a new folder?

Shane BI have a file file1.txt located in a trial folder containing the location of image files. I want to read the list, and copy the image files to a new folder, test_folder. The entries in file1.txt look like: ./trial/data/image1.jpg ./trial/data/image2.jpg etc. I tried to use a similar question...

1
Q: Recommended PCB layout understanding - ADM2572 datasheet

KamilI have problem with understanding and applying this recommended PCB layout to my design (image from datasheet, page 18): This is isolated RS485 transceiver with integrated isolated high frequency DC-DC converter (200MHz?). There is a trace connecting pin 11 and pin 14 that crosses the other t...

13:33
3
Q: Did arcade monitors have same pixel aspect ratio as TV sets?

rwallaceIt is well known that when emulating classic games on modern displays, you need to be careful not to distort the aspect ratio. Generally speaking, CRT screens were 4:3, and specific pixel aspect ratios of many classic arcade games, consoles and computers are given by http://pineight.com/mw/index....

RPG
RPG
5
Q: What if you are holding an Iron Flask with a demon inside and walk into Antimagic Field?

JesterDo the magical powers of the Iron Flask stop, releasing the demon? Also, would the demon then be sent back to its original plane (the Abyss)?

2
Q: How should I address a possible mistake to co-authors in a submitted paper

user3624251I am co-author of a submitted manuscript. I think I found a mistake in a metdodological approach in our paper. But I am not sure if I am right. But if that mistake is really there, than some conclusions in this paper could be changed. It will not unvalidate thwe whole paper, but some parts would ...

14:00
2
Q: MK2 Golf 1.3 1985 cuts out after starting

Michael Van RooyenI have a 1.3 VW Golf running a Pierburg 2e3 carb which has been off the road for at least 7 years. The problem I currently have is that the engine immediately cuts out when the key is in the run position in the ignition. There are no issues starting the car it fires up straight away. Since owni...

2
Q: EIGRP Auto-summary

Alexandre Amaral BednellOne more question about EIGRP, EIGRP auto-summary what is the impact on the network ? i was reading about but it was not clear for me. And why is it a good Cisco practice to be disabled ? I am studying for my CCNA and i really want to a have a good understanding of all topics, so apologies for...

1
Q: Is it possible to implement a neural network that computes y = x^2?

Boris BurkovIn spirit of the famous Tensorflow Fizz Buzz joke and XOr problem I started to think, if it's possible to design a neural network that implments y = x^2 function? Given some representation of a number (e.g. as a vector in binary form, so that number 5 is represented as [1,0,1,0,0,0,0,...]), the ...

RPG
RPG
14:19
3
Q: Can a college of swords bard use blade flourish on an OA from dissonant whispers?

Johnny RumConsider this scenario: a college of swords bard uses dissonant whispers on a creature within 5 feet of him while he is holding a melee weapon. The creature fails the save and has to immediately use its reaction to move away. In my understanding, this movement provokes opportunity attacks. So: ...

3
Q: Fear of getting stuck on one programming language / technology that is not used in my country

user101611I am a web developer on my first year of experience. My company works with technologies that are very uncommon in my country (e.g. ruby&ruby on rails). My fear is that acquiring experience in this language will get me stuck on it and will eventually make me lose better job positions for having e...

2
Q: Adding a System.debug changes code behavior

Oles MalkovI have the following code Map<Account, Integer> accountsMap = new Map<Account, Integer>(); Account a = new Account(); accountsMap.put(a, 1); a.name='Bob'; //System.debug(accountsMap); System.debug(accountsMap.get(a)); System.assertEquals(1, accountsMap.get(a)); Debug in the sixth line shows nu...

14:55
4
Q: How much character growth crosses the line into breaking the character

April(not a duplicate of Character Development - How much is too much? because that one is more about "overreaction" to smaller events.) TL;DR: How much can a character change without becoming unrecognizable? How can you indicate character growth (causes/effects) efficiently? I was listening to Worm...

15:24
1
Q: Bridge building with irregular planks

JonMark PerryImagine you have a big rectangular pond in your back garden. You wish to build a bridge from your house in the lower left corner to the small pagoda in the top right. You have lots of planks of length $1$ and $2$. You only wish to place planks orthogonal to the sides of the pond, and you don't w...

TeX
TeX
15:35
3
Q: putting logo on same line but after title, latex

MaYaI read all similar questions and their answers. But as total beginner they are not helping. Hope you can. \documentclass[10pt]{article} \usepackage[top=1in, bottom=1in]{geometry} \usepackage{amsfonts} \usepackage{graphicx} \title{test} \date{} \begin{document} \maketitle \includegraphics[widt...

15:49
1
Q: How to cover method return statement in Apex Class?

Alejandro FloresI'm writing a test for a schedulable class and so far it's working fine but I can't get the return statement to be covered by the test class. I'm missing something here and can't see it. The final returns on getMonthName (return Name) and getQuarter(Return Quarter) methods are not covered by the...

16:11
1
Q: Does IPv6 have similar concept of network mask?

TimDoes IPv6 have similar concept of network mask? How does it represent a network? In the output of ifconfig, does prefixlen 128 represent a network mask? lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> ...

DIY
DIY
2
Q: How can I avoid dust and bubbles when installing window film?

user875234I always get some kind of flaw when applying window film. Obviously I've read the instructions, watched diy videos, and even asked for advice before. I have changed up my technique as a result but I'm still getting flaws. Here are some pictures of my progress and current methodology. I’m getting ...

16:30
4
Q: What are the advantages of simplicial model categories over non-simplicial ones?

Tim CampionOf course, there are general results allowing one to replace a model category with a simplicial one. But suppose I want to stay in my original non-simplicial model category (say for some reason I'm a fan of quasicategories, for example). What do I miss out on? I think the idea is supposed to be:...

PM
PM
1
Q: User Story breakdown - Technical Task + User Feature

The Gilbert Arenas DaggerMy team is building a web application that has the following high-level user story: As a user, I would like the ability to bulk exclude components from a given country. The work breaks down into two distinct tasks. Create the web application feature that excludes components by country...

CS
CS
2
Q: Why EU agreed to delay brexit deadline?

M i echPretty much the title. My attempts to search google only bring in swathes or news items about extension, but no explanation of why it might be so, at least none that I can find. Attempt to make UK take part in upcoming elections and stay in EU out of inertia? It should be clear by now that no m...

5
Q: What to do if you miss a job interview (deliberately)?

AnonymousIt is a very irresponsible question. I had a Java interview scheduled today. I went near the office location and on the way I realized that I was not ready for the interview. The last year at my current job has been a very draining experience due to which I have been unable to polish my skills ...

16:51
5
Q: Probability: coin toss get a particular sequence

geiraAssume we have a fair coin. And we throw the coin 10 times in a row. I want to calculate the probability that the sequence 'tail,head,head,tail' occurs. So i think i can interpret this event as a binary number with 10 digits. So 1 means tail, 0 means head. Therefore we have $2^{10} = 1024$ differ...

1
Q: Does the Catholic Church consider Constantine's vision of "by this symbol conquer" to be from God?

RuminatorDoes the Catholic Church see in Constantine's vision a divine mandate or simply a myth?

17:09
2
Q: Junos[MX]: How to show VPLS instance associated with given subinterface

Seweryn NiemiecSuppose I have a subinterface with Vlan-vpls encapsulation, like this one: admin@router> show configuration interfaces ge-2/1/1 flexible-vlan-tagging; encapsulation flexible-ethernet-services; unit 17 { encapsulation vlan-vpls; vlan-id 17; } Is there any command in Junos which would sh...

1
Q: A binary search solution to 3Sum

AliceI tried a binary solution to 3Sum problem in leetcodes Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: The solution set must not contain duplicate triplets. E...

1
Q: PTIJ: Haman's bad computer

DanFEsther 9:25 ... ישוב מחשבתו הרעה (Esther requests that Achashverush should) return (Haman's) bad computer. What was bad about his computer? Did it not have enough RAM? Was the hard drive running slow? What technical hardware or software problems made it "bad"? Why did Esther want a bad co...

3
Q: Unexpected behavior of the procedure `Area` on the object 'Polygon'

Slepecky MamutSometimes get a results, sometimes left unevaluated. For instance Area@Polygon[{{0, 0}, {4, 0}, {2, 2}, {4, 4}, {0, 4}}] 12 Transpose@(a.b.Transpose[#]) & /@ Polygon[{{0, 0}, {4, 0}, {2, 2}, {4, 4}, {0, 4}}] (a,b - some 2x2 matrices) Polygon[{{0, 0}, {8, -64}, {18, -24}, {36,...

RPG
RPG
17:33
2
Q: What happens to a creature that changes size inside of Otiluke's Resilient Sphere?

VistIf one was to reduce a creature, making them smaller and then casting Otiluke's Resilient Sphere around them, what would happen when reduce has ended? Would the creature get crushed by the sphere due to becoming big again, or would the sphere enlarge itself? If they would take damage, how much a...

TeX
TeX
4
Q: Add big quotation marks inside my colorbox

SuperCiociaI have this code (MWE): \documentclass{article} \usepackage{tikz,lmodern} \usepackage[most]{tcolorbox} \newtcbtheorem{theo}% {Definition}{fonttitle=\bfseries\upshape, arc=0mm, colback=blue!5!white,colframe=blue!75!black}{theorem} \begin{document} \begin{theo}{Translationally ordered s...

17:49
2
Q: Quasinilpotent , non-compact operators

MarkusIf $X$ is a separable Banach space and $(\epsilon_n)\downarrow 0$, can we find a quasinilpotent, non-compact operator on $X$ such that $||T^n||^{1/n}<\epsilon_n$ for all $n$? I suspect the answer is positive, but cannot come up with an example.

RPG
RPG
4
Q: How can mimic phobia be cured?

VylixThis has actually happened to me as a player, and a player I've DM'ed in a oneshot. In short, when we delve into a dungeon, whenever a DM describes an object in a weird way, we become very cautious to approach the said object. This is very true with objects that usually can be an animated object....

18:10
11
Q: Calculating total slots

jayko03Given a list of jobs, which must be done in order, with each taking a slot to do, how long will it take to perform them all if after doing a job the same job cannot be done for the next two slots (cooling off slots)? However, a different job can be assigned in this cooling off slots. For example...

18:35
4
Q: Yosemite Fire Rings - What to Expect?

scohe001I'm planning a Yosemite trip for this summer. In reading up on the rules on fire restrictions, I saw this: When and where fire restrictions are not in effect, wood fires are allowed in existing fire rings only and prohibited above 9,600 feet in elevation. We'll be backpacking from Ten Lakes...

18:47
2
Q: Solve the following system of equations - (3)

Lê Thành Đạt Solve the following system of equations: $$\large \left\{ \begin{align*} 3x^2 + xy - 4x + 2y - 2 = 0\\ x(x + 1) + y(y + 1) = 4 \end{align*} \right. $$ I tried writing the first equation as $(x - 2)(3x + y - 10) = -18$, but it didn't help.

2
Q: Do the primes contain an infinite almost arithmetic progression?

Zach TeitlerThe primes contain finite arithmetic progressions of arbitrary length, but not an infinite arithmetic progression. Say we define an almost arithmetic progression to be a sequence $a_k$, $k \geq 0$, such that there exist $a,d$ such that $a_k = a+kd + O(\sqrt{k})$. Do the primes contain an infinite...

2
Q: How to create table with 2D function values?

John TaylorConsider some function f[x,y]. I want to create a table in the form table = {{x1,y1,f[x1,y1]},{x1,y2,f[x1,y2]},...,{x2,y1,f[x2,y1]},{x2,y2,f[x2,y2]},...}, where $x_{i},x_{i+1}$ and $y_{i},y_{i+1}$ are separated by some distances $\Delta x$, $\Delta y$, and i ranges from 1 to some N. The only ...

3
Q: How do apertures which seem too large to physically fit work?

LuLeBeA 400mm f4.0 lens is supposed to have a maximum aperture diameter of 10cm. Looking at such a lens they don't seem big enough to fit that kind of aperture including all the mechanics for control inside them. Do modern lenses have a way of focusing light into a smaller aperture to behave like a big...

DIY
DIY
19:27
5
Q: Mixing PEX brands

superstatorMy house’s plumbing was redone a few years ago using Uponor PEX lines and black (ABS?) plastic fittings with stainless clamp rings. I now want to add a tee for a hose bib. My local HD just has Apollo lines and brass fittings. My question: is it generally safe to mix brands and fitting types in ...

19:47
5
Q: Invalid date error by date command

ICEI want to get the date information with this command: date --date=2019-03-22 or date --date=2019/03/22 but it shows this error: date: invalid date ‘2019-03-22’ or date: invalid date ‘2019/03/22’ as you can see it is not related to dash. the same thing happens with slash. When I use...

3
Q: Can I still be respawned if I die by falling off the map?

BadelineI've been playing Apex Legends for a while, but apparently I still need more practice because I keep making a very newbish mistake: falling off the map. I'm usually trying to jump over a ledge to get cover during an intense fight, and don't realize that the ledge is actually a leathal cliff. My t...

20:04
1
Q: Store Credit Card Information in Password Manager?

SuimonFor convenience purposes I manage my passwords with the password manager Bitwarden on my personal computer and smartphone with autofill function (but with asking for the master password or fingerprint first every time). I was just thinking about also adding my credit card information (which is u...

2
Q: Using substitution ciphers to generate new alphabets in a novel

LiquidA substitution cipher is a method used in cryptography to encrypt the meaning of a text. In the most common form, a substitution cipher changes every letter in the target text with another, making it impossible to read without first decrypting it. For example, this sentence in bold is encrypted...

20:20
1
Q: System.QueryException unexpected token

user2451Trying to return all fields in object System.QueryException: unexpected token: '(' when I run the Invocable class at the parents = assignment public with sharing class AuditReportBulkifyClass { @InvocableMethod(label='Collect Bulkified Records') public static List<List<hdone__Audi...

5
Q: Creepy dinosaur pc game identification

SensorayI remember a dinosaur game from when I was little, I probably played it around 1998-2000's. In this game, dinosaurs could speak english and some would dress in clothes. I remember going to visit a female dinosaur with a crown like object around her head, she might have been part of royalty or an ...

3
Q: Calculate sum of polynomial roots

P. Miller We have the polynomial $P=x^{20}+x^{10}+x^5+2$, which has roots $x_1,x_2,x_3,...,x_{20}$. Calculate the sum $$\sum^{20}_{k=1}\frac{1}{x_k-x_k^2}$$ What I noticed: $$\sum^{20}_{k=1}\frac{1}{x_k-x_k^2}=\sum^{20}_{k=1}\left(\frac{1}{x_k}+\frac{1}{1-x_k}\right)$$ I know how to calculate the fir...

2
Q: Using cross-validation technique for a CNN model?

honar.csI am working on the CNN model, as always I use batches with epochs to train my model, for my model, when it completed training and validation, finally I use a test set to measure the model performance and generate confusion matrix, now I want to use cross-validation to train my model, I can imple...

3
Q: How do I delete all blank lines in a buffer?

AlexeiEmacs 26.1 In buffer 1 2 3 4 I use command "delete-blank-lines". But it NOT delete ALL BLANK LINES. It's delete ONLY ONE BLANK LINE. Why? I need to delete ALL BLANK LINES. The result must be like this: 1 2 3 4

20:39
4
Q: What is the evidence for the "tyranny of the majority problem" in a direct democracy context?

marcI have read about the ways to mitigate the "mob rule" or "tyranny of the majority" here, but is it a practical issue in the first place ? Has it been observed in a direct democracy context or in a referendum under non direct democracy ? In other words, is there an example in history where a pe...

20:49
@gen ping
2
Q: What exactly color does ozone gas have?

RuslanThis answer to a now closed question says that ozone gas has a "slight blue" color. But there are lots of blue colors: sky blue, ultramarine, phthalo blue, many others — what is closer to the color of ozone? This page shows photos of ozone solutions in water, like the one below, but this may not...

8
Q: Lowest total scrabble score

SpitemasterIt's generally easier to get a low score in Scrabble than a high one. But is it easier to get a really low score? Suppose you play a game of Scrabble by yourself in which you only make legal plays (that is, they'd withstand a challenge). You eventually play all of the tiles. The order of play...

21:39
1
Q: Why is this estimator biased?

Quality$X_{1},X_{2},..,X_{n}$ are iid $\sim Poisson(\mu)$ than the MLE for $\theta=e^{-\mu}$ is $\hat \theta =e^{-\bar x}$ Why is this considered to be biased for $\theta$? Is $E[\hat \theta]$ not $\theta$ ? as $E[\bar x]= \mu$

22:05
4
Q: Terse Method to Swap Lowest for Highest?

EdmundI have built a solution to swap the lowest values with the highest values in a list. With SeedRandom[987] test = RandomSample@*Join @@ Range @@@ {{6, 10}, {56, 60}, {1, 5}, {-5, -1}} {-1, 2, 7, 8, 60, 57, 58, 10, 9, 4, -5, -3, 3, 59, 1, 5, -4, 6, -2, 56} Then swapPositions = Permutation...

22:18
4
Q: Limits and Infinite Integration by Parts

HyperionIt is well known that $$\int \frac{\sin(x)}{x} \,dx$$ cannot be expressed in terms of elementary functions. However, if we repeatedly use integration by parts, we seem to be able to at least approximate the integral through the formula $$\int f(x) \,dx \approx \sum_{n=1}^a \frac{(-1)^{n-1}\cdot f...

8
Q: Why would a new[] expression ever invoke a destructor?

thbFrom the C++17 standard (draft here), [expr.new]: If the new-expression creates an object or an array of objects of class type, access and ambiguity control are done for the allocation function, the deallocation function, and the constructor. If the new-expression creates an array of objects ...

Vi
Vi
22:30
1
Q: creating a ":KeepCursor" command

MassI'd like to make a command that works like this: :KeepCursor {cmd} will the given execute ex command string, then restore the cursor's position. A primary example is: :KeepCursor normal! * which would perform a keyword search without jumping to the next match. This can of course be accomplis...

22:57
7
Q: How to hide some fields of struct in C?

WootiaeI'm trying to implement a struct person and I need to hide some fields or make them constant. A trick for create private fields. Header: #pragma once #define NAME_MAX_LEN 20 typedef struct _person { float wage; int groupid; } Person; const char const *getName (Person *p); int getId (...

1
Q: Can a Canadian Travel to the USA twice, less than 180 days each time?

Tristan ForwardI plan to travel to the USA for less than 180 days in 2019. I will return to Canada for Christmas and New Years, then return to the USA for approx 4 months and for sure less than 180 days. Can I do this? I've seen online 180 per calendar year (which would make this plan ok) and in other places p...

8
Q: Is aluminum electrical wire used on aircraft?

HarperAluminum electrical wire got a bit of a bad reputation in household wiring due to reacting badly with terminals not properly rated for aluminum. Properly handled, it works fine, but it's so distrusted for small branch circuits that distributors won't even stock it. Aluminum is a worse conducto...

23:13
5
Q: Novel, Lo Tech SF/Fantasy

DiggerLooking for the name of a SF or fantasy novel. I probably read this in the 70's or 80's. Believe was first published post 1960. Could be part of a larger series. My faulty memory keeps trying to tell me the author was a woman - but really not sure... Basic plot that I can remember: Two main...

23:28
4
Q: On a tidally locked planet, would time be quantized?

Justin Thyme the SecondAssume a planet that always presents one side to the sun. No moons. The orbit of the planet around the star is essentially spherical, very minor and undetectable aberrations. The orbital period of the planet around the star is in multiples of the lifetimes of the sentient beings. That is, no sent...

TeX
TeX
23:57
3
Q: Extract more than nine arguments that occur periodically in a sentence to use in macros in order to typset

Guido JorgWhat is a good way to write a definition of the type \fun below \fun{abc1 EDF1 xyz1 efg jkl abc2 EDF2 xyz2 efg jkl abc3 EDF3 xyz3 efg jkl abc4 EDF2 xyz4 ...} where the number of arguments is not known in advance, may be 1, or may be more than 9, like 12, and the result is as below abc1 EDF1 \f...


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