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Consider the following simple code: \def\@ifundefined#1#2#3{% \cs{UNDEF}{DEF} \def\reserved@a{#2}% \def\reserved@b{#3}% \ifdefined#1 \let\reserved@c\reserved@b \else \let\reserved@c\reserved@a \fi \reserved@c} The same result can be achieved with: \toksdef\tokszero0 \toksdef\tokstwo2 \def\@@ifundefined#1#2#3{% \cs{UNDEF}{DEF} \tokszero{#2}% \tokstwo{#3}% \ifdefined#1 \let\reserved@c\tokstwo \else \let\reserved@c\tokszero \fi \the\reserved@c} Is there any significant difference? (Aside...

I have custom post type called events it has event_type taxonomy with two terms namely past-events, upcoming-events. I want to check my single post's term whether it's under past-events or upcoming-events Based on that i can display message. Thank you...

I am having trouble figuring out how to reconnect this ribbon cable. My dear removed it when he was trying to fix our projector and cannot figure out how it went in. There doesn’t seem to be a way...

When I was taking my one (weak) Russian course years ago, I ran across an MP3 with sample sounds. The pair that got me very worried was Борис vs Борись. At the time, I could hear only the vaguest difference...

I need to create text along an elliptical path that tapers down as it goes, kind of like the red part shown below. How could I go about doing this without changing the font size for each individual character?

I am having a data structure similar to this: Class A { public String Name; public String status; public List<B>; } In the Visualforce page, I need to display both A and B's information in one table. Like below: Please...

I know some basics on callouts but would like some advice on doing multiple callouts. Requirements: I have an external system where guests are registered this could be large amounts. I have to get these into Salesforce and also check...

I have a control: DailyHours. That has a collection of custom TimeEdit controls I created. Each control is supposed to bind to the DailyHours view-model class. Instead it tries to find the values I bind to in the TimeEdit control....

Why does an Ekasi oscillator oscillate? From my research, I learned that when this is first plugged in, the capacitor is charging, so the LED doesn't shine. When the capacitor reaches 12v, then the current switches to the top loop...

The RCA 1802 processor was used in a number of systems such as the ELF and COMX-35, and also apparently in the US space program (with its hardened variant). From memory, it had a rather unusual set of instructions for...

Gimp 2.10 offers the possibility to change metadata but my question is that if I edit metadata using gimp... Can I erase all photo metadata using Gimp? Or it will be some metadata I can not erase using gimp? Thanks...

What antivirus programs are available for Ubuntu? We previously used Symantec Endpoint Protection but it does not work in Ubuntu.

$3^{2x}-2\left(3^x\right)=3$ My solution: $\left(3^x\right)^2-2\cdot \:3^x=3$ Make the substitution $3^x=u$ $\left(u\right)^2-2u=3$ $u^2-2u-3=0$ $u=3,\:u=-1$ No solution for $3^x=-1$ $3^x=3$ I was wondering how i can do this question using logarithms? then $x=1$ ...

Does there exist an arc (something homeomorphic to the interval $[0, 1]$) that is nowhere differentiable? If so, how does one define the arc length function along such an arc? Can a topological arc have infinite length?

In 1936 "The Hyborian Age: Conan's World", Howard laid out a somewhat detailed "canon" history of Conan's world, pre- and post-cataclysm. This included verbal description of the world maps and where each people's and states were. Are there any maps...

When we consider a vector space $V$ over some field $F$, I know that when the $F=\mathbb{R}$ or $ =\mathbb{C}$, by setting $\|x\|=\left\langle{x,x}\right\rangle^\frac{1}{2}$ we get a norm. However, since the inner product is a function with its image in $F$,...

I wanted to find a accuracy solution of the following ODE. $$y'(x)+y(x)=-y(-x).$$ But when I try to use DSolve as follows DSolve[y'[x] + y[x] == -y[-x], y[x], x] I get a warning message: DSolve::litarg: To avoid possible ambiguity, the arguments...

How can I check if a point belongs to a polygon? I want to create a custom identify tool with edit option. I am using C# and ArcMap 10. My idea is to click on the polygon (building/park/etc) in ArcMap...

Desiderius Severus today at 01:14.
**1** answers,
**110** views
nt.number-theory automorphic-forms l-functions

Let $L(s)$ be an automorphic L-function (attached to a self contragredient automorphic representation on $GL(3)$), according to the following notations for $s$ of sufficiently large real part: $$L(s) = \sum_{k=0}^\infty \frac{a_n}{n^s} = \prod_{p} \left( 1 - \alpha(p)p^{-s} \right)^{-1} \left( 1...

Let $g \geq 2$. Let $S = \langle a_1,b_2,...,a_g,b_g | [a_1,b_1] \cdots [a_g,b_g] \rangle$ be the fundamental group of a genus $g$ surface and let $F_g$ be a free group with $g$ generators. Given two surjections $f_1,f_2 : S \to...

Charles L Wilcox today at 00:40.
**2** answers,
**486** views
c++ c++14 language-lawyer undefined-behavior compiler-bug

I wrote a lightweight 'string_view' wrapper for a C++14 project, and with MSVC 2017 it is triggering a static_assert at compile-time, yet the same code at run-time is passes the regular assert. My question is, is this a compiler bug,...

If Quirrell got burnt when he wanted to hurt Harry, why didn’t others? I mean was this power Harry had from his mother mentioned in any other situation? Or did Lily's sacrifice just work for Voldemort and Quirrell died because...

I'm trying to think of what kind of cosmic event would cause an explosion powerful enough to "shake" or disrupt the whole flow of a galaxy and on that same note what other kind of super cosmic event would have...

I'm trying to credit a custom field which only need month and year (like credit card exp date) I choose datetype date, when creating the field, but it also needs a date as well. How can I create a field...

The transformer rating is given in kVA, but the load connected is always considered in watts. Why? Eventhough, the load active power is represented in watts it has some reactive power, right? Is the total power consumed by load (active...

Profile likelihood is sometimes used to get estimates for the confidence limits of parameters from an n-dimension parameter fit to a model. It can be used for example instead of Monte Carlo estimation. I don't understand the intuition of the...

I am looking for a single-word verb that means "acting impulsively". For example, "You can never tell what Harley is going to do. She always [acts impulsively] without thinking things through." I'd like it to be as generic as possible....

In the TV show House of cards, angry President Garry Walker finds out his vice president, Frank, has been betraying him possibly to replace him as president. Garry says to Frank: From this moment forward, I don’t want to hear...

Consider the first order linear ODE $F(x) + A x F'(x) + B = 0$, with initial condition $F(1) = 1$. Moreover, let $A,B \neq 0$, real, and $sgn(A) = sgn(B)$.* *... if the latter matters. Mathematica gives me the...

This might be paranoid, but if I go to a malicious website, can they tell what is inside a PDF on my desktop or what is inside my images on my hard drive? I have a Chromebook and a Windows...

A very well-known aphorism from Antoine de Saint-Exupéry is Il semble que la perfection soit atteinte non quand il n'y a plus rien à ajouter, mais quand il n'y a plus rien à retrancher. (Terre des Hommes, 1939). The canonical...

I'm trying to create a world where there's an equator-like divide running along the axis(?) of the planet and the two hemispheres are perpetually different in terms of temperature. Basically, I want one side of the world to always be...

I am trying to calculate the force sustained on the three labelled members of this frame (Members 1, 2 & 3). The frame will experience a uniform pressure of 1000 kPa in the area enclosed by the members. It...

I have a problem with my application and more precisely the pop up that appears empty. controls.push(new OpenLayers.Control.WMSGetFeatureInfo({ autoActivate: true, infoFormat: "application/vnd.ogc.gml", maxFeatures: 3, eventListeners: { "getfeatureinfo": function(e) { var items = []; Ext.each(e.features, function(feature) { items.push({ xtype: "propertygrid", title:...

I need help to identify the coordinate system of the below point in Guinea {"Name":"Simandou", "Latitude":0.29482446877975, "Longitude": 0.08190694324693, "k1":0.22528363047002, "k2":1.4976525821596} I am not able to identify the unit of the Lat and Long but I looked for the Name on...

I want to find the convex conjugate (Legendre transform) of a quadratic for $1/2x^{t}Qx$ when $Q$ is positive semi-definite. If Q is non-singular, the solution is easy - the gradient is $y-Qx=0$ so $y=Q^{-1}x$ is the value for which the...

In Devi Suktam, word (sarvabhūteṣu) is repeated for different manifestations of Devi. I am quite sure with Sarva(सर्व) means all, but word Bhoota (भूत) just confused me a lot. Bhoota is quite commonly used for Past in context of past,...

Michael Lai yesterday at 22:45.
**5** answers,
**493** views
design-patterns signup-signon accounts ethical-design

Trust and personal information security are very important issues these days when it comes to online accounts, so it is not unusual for people not wanting to create an account (i.e. provide personal information) when making purchases or requesting information....

I'm currently having this issue where the table is intruding into the second column and I can't figure out what I've done wrong... \documentclass[twoside,twocolumn]{article} \usepackage[hmarginratio=1:1,top=32mm,columnsep=20pt]{geometry} \usepackage[hang, small,labelfont=bf,up,textfont=it,up]{caption} \usepackage[utf8]{inputenc} \setlength{\arrayrulewidth}{0.25mm} \setlength{\tabcolsep}{9pt} \renewcommand{\arraystretch}{1.5} \begin{document} \begin{table}[ht] \begin{tabular}{ p{5cm} p{5.3cm} } \hline Parameter &...

FreshmanUCSD yesterday at 22:22.
**3** answers,
**211** views
functions discrete-mathematics elementary-set-theory

$f: \Bbb{Z} \to \Bbb{Z}, f(x) = 3x + 6$ Is $f$ a bijection? If no, explain why it isn’t. If yes, find an expression computing $f^{−1}(y)$ for $y \in \Bbb{Z}$. How to approach that question?

Aside from the official documentation what other good Xindy tutorials are out there, either on the Internet or in textbooks (not necessarily in English)?

Why do we need to set speed for GPIO output pins in STM32? The STM32F4 Reference Manual on page 278 says that: The data present on the I/O pin are sampled into the input data register every AHB1 clock cycle....

WilliamKF yesterday at 21:35.
**1** answers,
**131** views
palaeography 18th-century virginia taxation-records

I need help reading this word (?Tist?) that keeps occuring in the Chesterfield tithe list for 1761 in Colony of Virginia: It seems to be repeated on each entry that is not counted for the tithes. What is the word/abbreviation...

Each line has an answer. Each line's answers are clues for the paragraph's answer. Those in turn are clues for the section's final answer. The five final answers form a list composed by me. Partial answers are welcome. Number five...

Am i correct if i would state that all galaxies have a blackhole in the center. Since other galaxies orbit around a center point in a galaxy the barycenter right? I would assume at this point there must have some...

Here is the situation: I am working with 2 others on a paper A, and simultaneously by myself separately on a paper B (which is a thesis). A and B are on very much similar topics. I started with paper...

The minimal power iteration of a number \$n\$ is defined as follows: $$\text{MPI}(n):=n^{\text{min}(\text{digits}(n))}$$ That is, \$n\$ raised to the lowest digit in \$n\$. For example, \$\text{MPI}(32)=32^2=1024\$ and \$\text{MPI}(1234)=1234^1=1234\$. The minimal power root of a number \$n\$ is defined as the...

Anna Abasheva yesterday at 20:08.
**1** answers,
**264** views
ag.algebraic-geometry reference-request kt.k-theory-and-homology algebraic-k-theory

Matsumoto proved in his PhD thesis that if $F$ is a field than $K_2(F)=(F^*\otimes F^*)/(x\otimes (1-x))$. The original Matsumoto proof as it is written in Milnor's book on algebraic K-theory looks not really nice to me and one guy told...

My party has gotten themselves into quite a pickle and one of our characters has gotten his mouth sewn shut by magical thread, which we can't cut. He is unable to eat and our GM has determined that he had...

Creating a drawing for a part that will be CNC milled. Should all of my dimensions come from a baseline on the part, like an edge or is it ok to use Centerlines? See yellow highlighted dimensions below for example....