« first day (1930 days earlier)   

12:05 AM
1
Q: CPQ: Can a Product be set up to be sold exclusively as part of a bundle?

JwokUsing CPQ, Is it possible to set up a Product so that it can be sold as part of a bundle while preventing it from being sold as a stand-alone item? For example, I have product A which has Product B and C as Product Options. I don't want B and C to appear as available products in the Quote Line Ed...

 
1
Q: Is the span of the eigenvectors of a non self-adjoint compact operator dense in the operator range?

Cyril SolerI know that for a compact self-adjoint operator (I assume a separable Hilbert space), the eigenfunctions form a Schauder basis for the entire space. But if the operator is not self-adjoint, does this property still hold at least for the range of the operator? I cannot find a reference of it, whic...

 
CS
3
Q: Why does the author of Hebrews render their quotation of Jeremiah 31:33 differently in two places?

Avi AvrahamThe book of Hebrews uses the Hebrew Bible as support for its arguments many times. The author cites Jeremiah 31:33 in two different places and chooses to render the verse curiously differently each time. The first citation occurs in Hebrews 8:10: ὅτι αὕτη ἡ διαθήκη ἣν διαθήσομαι τῷ οἴκῳ Ἰσραὴλ μ...

 
4
Q: C++ program to format byte sequences into Python like string representations

Ξένη ΓήινοςThis is a C++ program I wrote, that includes functions to convert integers to byte sequences in little endian or big endian order, and functions to convert a byte sequence to a string representation. There are two representation formats I use, one is very simple in which each byte is represented ...

 
TeX
12:31 AM
1
Q: Square root symbols that don't match

QwertyI'm getting a weird result using the code that follows. The square root symbols don't match. \begin{equation} \frac{1}{\sqrt{2 \pi \sigma_x^2}} \frac{1}{\sqrt{2 \pi \sigma_y^2}} \end{equation}

 
TeX
12:53 AM
2
Q: Polygon and trace arrows

AlejdI asked for help to trace this polygon, and someone kindly sent me this code, unfortunately there's still something wrong cause the lines between the nodes are not arrows and I'm absolutely uncapable to understand that code. Is someone can tell me how to replace the lines by arrows as on my pictu...

 
1
Q: is German becoming more informal?

ÐаոJust returned from spending several days in Germany (Bavaria and Baden-Württemberg) ... I noticed some use of the informal Du in situations where I wouldn't have expected it. Was it just my imagination? Or is it a southern-Germany thing (and I would have never heard such in Berlin)? Or is the la...

 
1:40 AM
4
Q: Why would aliens use Kaiju to cause an apocalypse instead of more effective weapons?

Coolcats112Kaiju in fiction are usually alien in nature or are created by aliens. However, in my story Kaiju seems to be less effective as an apocalypse compared to diseases, asteroids, black holes, and many more apocalyptic threats. In my story aliens decide to use Kaiju to attack/destroy humanity. I know ...

 
DIY
1
Q: How to remove insecticide overspray from objects

coure2011I was spraying Kingtox spray (active ingredients: meperfluthrin, esbiothrin, permethrin, cypermethrin) and mistakenly sprayed on wall clock as well. Question is it harmful later on if somebody touches the clock? If yes then how to clean the clock so it does not contain any harmful chemical.

 
TeX
2:20 AM
2
Q: Array aligned with top of item label

Vincent KrebsI don't understand why the [t] parameter of the array environment does not do anything. I want the top of the brace to be aligned with the top of my item label but it does not work. \documentclass{article} \begin{document} \begin{itemize} \item $\hspace*{-1pt}\left\{\begin{array}[t]{@{}c...

 
2
Q: Why is the Fourier transform in probability defined with the opposite sign?

CBBAMFor $f \in L^1(\mathbb{R}^n)$ its Fourier transform is defined as $$\hat{f}(\xi) = \int_{\mathbb{R}^n} f(x) e^{-i\xi\cdot x} dx$$ up to a choice of normalization. The inverse Fourier transform is defined as $$\check{f}(x) = \int_{\mathbb{R}^n} \hat{f}(\xi) e^{i\xi\cdot x} d\xi.$$ However when def...

 
RPG
2:48 AM
5
Q: How to make the enemy attack me?

AndrásI created a character with a high AC, Shield Block and Toughness to be tough, then took Champion Dedication and Retributive Strike to discourage the enemy from hitting my team mates. Still, I finish most of the encounters with full HP. Obviously, most of this is up to the DM, and it makes sense t...

 
2
Q: Why Don't The Israelites Eat Their Animals in the Wilderness?

AaronThe Israelites are in the wilderness for 40 years and in that time they have a few crisis moments that always lead me to the same question. Why don't they just eat their animals? They ask for meat, when scripture makes it clear they left Egypt with many kosher for eating animals. They ask for wat...

 
1
Q: Does Larmor radiation show that the fundamental laws are not necessarily time-reversible?

pwfIt is often said that the fundamental laws of physics are time-reversal symmetric, and therefore the arrow of time is an emergent phenomenon. An example that is often given is the elastic collision of two particles - in principle, the argument goes, you would not be able to distinguish a movie o...

 
3:32 AM
6
Q: Is there an explicit construction of the Bohr Compactification of the Integers?

DaronIs it possible to explicitly describe the Bohr compactification of $\mathbb Z$? This is equivalent to describing all the group homomorphisms $\mathbb R/\mathbb Z \to \mathbb R/\mathbb Z$ including the discrete ones. Keith Conrad has written up an explicit construction of the set of all homomorph...

 
3:55 AM
2
Q: Looking for name of Schwinn Le Tour variant above "Super" (mid 1980s)

Formerly fat longboarderI am looking for the name of Schwinn Le Tour variant above "Super" (mid 1980s). I remember perusing Consumer Reports (and ended up getting a Super Le Tour) c. 1985. At that time, there were like three variants of the Le Tour (low, medium, high performance). I remember Super being the medium. C...

 
4:40 AM
1
Q: How to compare three groups of patients if one group is normally distributed but the other two are not?

Faye MortonRetrospective study involving three groups of patients. Group 1 are patient's diagnosed with sepsis. Group 2 are patient's diagnosed with a localized infection. Group 3 are "healthy" controls. I'm looking at parameters called cell population data available on a haematology analyser. For example, ...

 
TeX
4:58 AM
1
Q: Multiple errors with tabularray

NicolasI want to create a table with the tabularray package but I don't understand why the compilation gives me several errors: I have the impression that it is due to word wrapping in the cells. Can anyone help me? My code: \documentclass{article} \usepackage[left=1.5cm, right=1.5cm, top=1.5cm, bottom=...

 
2
Q: What is the product in the category of sets with only the injections as maps?

Lukarios 5157What is the product in the category of sets with only the injections as maps? In the category of sets with all the functions/maps, the product will be the "$\times$", but in the subcategory with only the injections, "$\times$" doesnt fit, and the intersection doesn't appear to fit either. Take t...

 
DIY
2
Q: Accidently Glued PVC to threaded PVC and it Leaks

Jeff CI am very new and I accidently glued an elbow to a threaded piece of PVC. Yes, I know that was dumb, lets move past that :) Its leaking. Any idea what I can do to stop the leak? It has to be an in-place fix. I should mention it is on a drain for the shower so it isn't under pressure and only ...

1
Q: Mounting Network Switch on Aluminum Wiring Box

riverofwindHi I need to be able to mount a networking switch on the inside of a wiring box. The options I've come up with are mounting tape, velcro adhesive, and the conventional way of using screws drilled into the back of the box to hold up the switch. Any other options? What's the best route to take? Als...

 
5:37 AM
7
Q: A movie from the 70s, 80s, or 90s like John Carter (2012) with a guy from Earth, a girl, and a caveman/tribesmen

StefanWhen I was younger I watch this sci-fi/fantasy movie on YouTube but I can't remember its name. It had a man from Earth getting transported to another world. He meets a lady, who turns into his love interest, and a caveman. They travel through the desert. At the end, the villain sends the man back...

8
Q: Story about a huge project in Hell?

releseabeMy guess is that this story was written before 1980 and certainly before 2000. Demons or damned souls have built like a galley with which they plan to drag Hell itself or maybe just the galley to Heaven. It will take an incredible length of time, but they sure have the time. The story has one dem...

 
6:09 AM
3
Q: Could chromatophores function suspended in fluid?

fyshsticksjust wondering if there's any way chromatophores could function while suspended in fluid (maybe something similar to hemolymph?) I'm basing this off of mollusk chromatophores in particular, which as far as i'm aware, are multicellular units that are controlled by muscle. Would it be possible for ...

 
1
Q: How to Solve a Linear System of Equations with Absolute Values

Kuly14I have encountered a system of linear equations that involves absolute values: \begin{align} |x + y| &= 1 \\ |x| + |y| &= 1 \end{align} I am having trouble finding resources or methods to solve systems of equations involving absolute values. My initial approach is to consider all possible combi...

 
 
2 hours later…
8:23 AM
1
Q: What does it mean to run a power analysis for one variable in a multiple logistic regression?

MohanI'm analysing a published logistic regression with 11 predictors, $\textrm{logit}(Y) = \sum \beta_i X_i$. The study unfortunately only reports which of the $X_i$ are significant predictors, and does not give any estimates of $\beta_i$. Only $X_1$ is of interest to me. I need to try to show that t...

 
8:56 AM
1
Q: Is Frege's axiom of unrestricted comprehension actually true after all?

lee pappasConsider the following demonstration whose first line is the assumption called the axiom of unrestricted comprehension. ∀F∃y ∀x[x ∈ y iff F(x)] [OSC1] ∀F∃y [α ∈ y iff F(α)] [UI] ∃y [α ∈ y iff α ∉ α] [UI] α ∈ x1 iff α ∉ α [EI] The only way to get Russell's paradox is if alpha must be a general c...

 
5
Q: Exercitia Latina, Ch. 16: "...nāuigantī..."

Mr. BlytheMy question stems from a task of comprehension from the exercises for Lingua Latina Per Se Illustrata Familia Romana. What is the grammatical class of "nāuigantī" in the following excerpt and what role does it play? Italicised words were blank spaces to be filled. Exercitia Latina Chapter 16,...

 
9:29 AM
4
Q: What is the Derivative of Speed?

Jiamu YueThe derivative of velocity is acceleration, but I don't know what is the derivative of speed, specifically $\sqrt{(x'(t))^2+(y'(t))^2}$. In projectile motion, the acceleration is a constant $-9.8\,\mathrm{m/s}$ but the derivative of speed looks like this. $X$ axis is time but I don't know how to ...

 
9:50 AM
2
Q: Does hysteresis still occur if saturation is not achieved in a core?

EricEvertonWhen looking at a BH curve, what happens if the H field is raised to some level below saturation. For example we apply an H field that is only half way to saturation. On a BH plot this will trace a line from the origin to some positive B value. When we decrease the applied H field back to 0, ...

 
5
Q: Why Faonte called "small" and "big" dg-nerves?

KeimaI read G.Faonte "Simplicial nerve of an $A_\infty$-category" (https://arxiv.org/abs/1312.2127). In his paper, he calls two dg-nerve construction "small" and "big". "Small" one means an $\infty$-category via (ordinal) dg-nerve of a dg-category. [HA. section.1.3.1] "Big" one means an $\infty$-cate...

 
10:06 AM
1
Q: Why do people believe that John the Baptist and Jesus never knew one another?

franke jI understand John 1:31 has the words "I did not know him" but in the actual context of the scripture itself, beliefs and doctrines aside, John is clearly saying he didn't know Jesus is the one that would baptize with the holy spirit. John 1:31 NKJV I did not know Him; but that He should be revea...

 
2
Q: Do Orthodox Christians have more freedom than Catholics to dissent from Church teachings on political and social issues?

K ManI know that the Patriarch of Constantinople has no binding authority over individual bishops and there is no doctrine of infallibility, but what about the authority that bishops and priests have over lay Orthodox Christians? Are there any teachings one can dissent from or rules one can break and ...

 
2
Q: Normalized hamming distance in probability

DavidLet two functions $f,g :[n]\to \{0,1\},$ then we define $$\delta{(f,g)}=\frac{|\{i\in[n]:f(i)\neq g(i) \}|}{n}$$ is called normalized hamming distance. My teacher said me this $\delta{(f,g)}$ is equivalent to $$\mathcal{P}\{f(i)\neq g(i)\},$$ where $i$ chosen uniformly at random. $$\mathop{\mat...

 
10:57 AM
6
Q: Understanding a computation in a classic ramsey theory paper

RobertI'm trying to understand the paper A note on Ramsey numbers by Ajtai, Komlos, and Szemeredi $1983$, and I am having trouble finding the "simple ( omitted ) calculation" in case $1$ of the proof of theorem $2$: The setup is as follows: Let $G$ be a triangle-free graph with $n$ vertices average de...

 
11:47 AM
1
Q: Path from humanities undergrad to math PhD

AlcibiadesThis is out of left field. I have recently been realizing that, since my favorite classes are math, my best friends have all been future mathematicians, and I love nothing more than thinking about math, perhaps I should look into a PhD or career in mathematics. I just finished my second year at S...

 
1
Q: Are Unique Options FX and Unique Options a scam?

Charles RennakerI invested in Bitcoin through Unique Options FX uniqueoptionsfx.com I paid fee after fee after more fees. Unique Options FX was closed and Unique-Options has been opened. Now unique-options.com website is down. Is there a way that I can recover my funds?

 
12:04 PM
3
Q: Reference request for Bessel function of the second kind with matrix argument

learner123As the title says, I would like to know if anyone could provide a reference which provides the definition and properties of the Bessel function of the second kind with matrix argument. If possible, I would appreciate as well any reference which provides its power series.

 
12:17 PM
2
Q: Why does Professer Binns always call students by different names?

Mini88881Professor Binns always calls the students with different last names - for example, for Harry, he says: "Off you go, Perkins." Harry Potter and the Order of the Phoenix or to Hermione: He stuttered to a halt. Hermione’s hand was waving in the air again. ‘Miss Grant?’ ‘Please, sir, don’t legends...

 

« first day (1930 days earlier)