I lol'd

@yo' LOL

@DavidCarlisle oh no

@yo' I am already suffering a lot because of the noise. :)

@AlanMunn ooh a donut

@yo' LOL

@PauloCereda oh no! I bet ducks are scared of our festivals :-)

@CarLaTeX @PauloCereda Thinking about it again, I realize there's nothing to laugh about. It's more something to worry about.

@yo' the Carnaval? :)

@PauloCereda that, too :) We should warn @AlanMunn not to choke on koblihas :D

@yo' ooh :)

@marmot: the palindrome thingy is probably some sort of inner search for symmetry. It's like the study telling that most people keep their TV volumes at a even number because, for some reason, an odd number gives them the impression of chaos and disorder. :)

My TV is at 42 for... reasons. :)

@yo' Unfortunately, you're right!

@PauloCereda here the digits of the volume are so small that I have no idea what the numbers read :-)

@yo' ooh I bet it's an even number. :D

@PauloCereda I pinged you at Gtalk

@yo' ooh let me open it

@samcarter: Can we have a \useducklibrary{chess} for tikzducks so we have a chessboard and chess pieces with ducks? :)

@UlrikeFischer ^^

@PauloCereda needed not be that difficult: a bow for the bishop (bishop is střelec in Czech, which means archer) and a trunk for the rook (which is elephant in some countries). Finally, a tongue bit for the knight

@yo' exactly. :) And it would be awesome to have a bishop duck. :)

@PauloCereda oh you mean like a duck with a collar? :-)

@yo' ooh

@PauloCereda Oh, I like this idea!

@PauloCereda or tables:

@yo' oh

@PauloCereda Maybe the donkey duck could be changed into a horse and used as knight

and normal ducks as pawns

@samcarter @UlrikeFischer is our chess expert, she certainly has great suggestions! :)

@samcarter does the bounty work on a wiki post? Mark deserves it!

@egreg Please, what meanings does leggiero have? Can it be both light and non-strict? I mean, in music, could it be both about the loudness and about the rhythmical precision?

@yo' Yes, but it is leggero not leggerio :):):)

@CarLaTeX ma non troppo!

:D

@PauloCereda :)

@CarLaTeX Yes, bounty also works for wiki post

@CarLaTeX well, actually it's leggiero according to the photo...

@PauloCereda Search for "Rubber Duck Chess Game" ;-)

@yo' Maybe it is archaic

@UlrikeFischer ooh

@yo' The modern spelling is “leggero”, but it used to be spelled also “leggiero”. It means “light”. I don't think it can refer to rhythm.

@UlrikeFischer: We're sorry, this item is currently Discontinued

OH NO

/quacks in despair

@egreg ok. So is it precisely the same as légère, which can also mean relaxed, from what I understood?

@egreg It comes from this question at Music: Practice & Theory and I wonder whether the author could have written leggiero to mean that the LH need not be played precisely in the 5-tuple rhythm:

@yo' Asked to my professional musician friend.

allegro piu largo

We ducks are good with tempo. :)

@yo' But istinctively I'd agree with the other answer.

@egreg well, I did not rely on the word leggiero, I just relied on my experience with 5-tuples in the LH :)

ooh mr. marmot is here!

@PauloCereda Did you dress up? As duck?

@marmot hm?

@PauloCereda I thought it's carneval right now...

@marmot ah! :) I don't like the event, to be honest. :)

@marmot How should I dress for this afternoon's Calculus test?

@egreg Oh, you have to pass a test? Maybe use something not too offensive such that the examiner does not get mad at you.

@marmot I think he is the professor :)

@CarLaTeX I know, just wanted to tease him ;-)

@marmot LOL

@marmot I have to make sure I'm able to solve the questions I put in the test. ;-)

@marmot Thankfully you weren't inclined to taser him. :)

@egreg ooh

@egreg Prove that every integer greater than 2 can be written as the sum of three primes.

@egreg Here is the perfect dress for you:

It is called "Signore Marmotta" ;-)

@marmot ooooh

He's ready to sing a catchy tune

I have an enumerate inside a figure (let's say figure 5), can I reference this as 'consider item 5.3'?

@Marijn I would favour item 3 from Figure 5, but this is just a personal style. :)

Ok, but can it be in a single \label/\ref?

@Marijn ooh I don't know, we need experts. :) @egreg ^^

This seems promising! :)

looks good indeed

but I tried it with \thefigure instead of \thesection but it prints 1.1 instead of 5.1

so I'm not there yet :) but thanks for the tip

@Marijn \ref{<figure>}.\ref{<item>}

@egreg one typesetting beauty for you :)

@yo' Use of the \because and \therefore symbols should be punished by law.

Probably too advanced for @DavidCarlisle ^^

@AlanMunn ^^

@JosephWright Please, I just typeset an article that uses Ø to denote "the hydrogen permeation rate". Any idea if that's standard and which LaTeX symbol would be the proper one?

@yo' Never seen that, sorry

@JosephWright ok, thanks anyway!

Friends, is it possible to keep the amplitude?

\documentclass[margin=0.5cm]{standalone}

\usepackage{tikz}
\usetikzlibrary{calc}
\usetikzlibrary{decorations.pathreplacing}

\begin{document}
\begin{tikzpicture}
\node [draw, minimum size=0.5cm, text height=1.7ex,text depth=0.3ex, text width=0.5cm] (a) {};

\draw [decorate, decoration={brace, amplitude=10pt, mirror}]([yshift=-5pt]$(a.south west)$) -- ([yshift=-5pt]$(a.south east)$) node [midway, yshift=-0.6cm] {a};
\end{tikzpicture}
\end{document}

@PauloCereda Take a look at this: tex.stackexchange.com/questions/368047/scaling-tikz-brace

@PhelypeOleinik Thanks, I was worried that this would break my existing document!

@PauloCereda You're welcome :)

@PhelypeOleinik I am tempted to show the resulting image, but the document is that one. :) I'd break the rule of not working on the thesis. :)

@PauloCereda Ooh

It would not break the rule if you say it's for an image for a friend :P

I'm curious now

@PhelypeOleinik ^^ it's for a friend.

Neat :)

@PhelypeOleinik: the content might not be stellar but oh boy are the images cool! :)

Are the braces the same height?

It looks like the second is a little bit taller...

@PhelypeOleinik For some reason, the left part looks a bit off than the right one, but I am not too worried for now. :)

@PauloCereda Maybe it's just an optical illusion...

@PhelypeOleinik They look fine here (baseline-wise).

@PhelypeOleinik David: @PauloCereda's entire thesis is an optical illusion.

Oi

Oh wait...

hahahahhahahha

He'll say that soon enough

I'm trying to typeset this.

@PhelypeOleinik Definitely. :) Thanks for the help with TikZ, I really appreciate it. :)

Using \vphantom in the upper cell of the right vector works, but pushes the d over to the right.

@PauloCereda You're welcome :)

Is there a math mode command for moving the d to the left without affecting anything else related to the typesetting?

\[\overbrace {\left[ {\begin{array}{*{20}{c}}
	{\left[ {\begin{array}{*{20}{c}}
			\vec{v}_1'\\
			\vec{v}_2'
			\end{array}} \right]}\\
	\vec{v}_3'
	\end{array}} \right]}^{\rm First} \equiv \overbrace {\left[ {\begin{array}{*{20}{c}}
	{\phantom{\begin{array}{*{20}{c}}
			\vec{v}_1'\\
			\vec{v}_2'
			\end{array}}{\vec{v}_1}}\\
	\vec{v}_2
	\end{array}} \right]}^{\rm Second}\]

Any help would be appreciated. :)

@COTO I shouldn't mention this because it's certainly a hack and @egreg will hit me on the head with a sharpen object. When using \phantom, it gives a box with both vertical and horizontal dimensions. In your case you just want the vertical thingy, so \vphantom would do.

@COTO You say \vphantom, but the pasted code uses \phantom.

@HaraldHanche-Olsen oh he already said that, I didn't read it! Ouch.

Ah yes. And \vphantom instead of \phantom works. Thanks for catching that.

Just for reference, is there a math mode command in LaTeX such as \centerthis{<width>}{<height>}{<contents>} that creates a box with the specified width and height (and for all intents and purposes, from out "outside world", considers this to be the dimensions of the content inside), but centers the content both horizontally and vertically?

For example $\centerthis{30pt}{30pt}{a}$ creates a 30pt by 30pt box with "a" in the middle.

I tried \mbox{30pt}{30pt}{a} and got (quite literally) hundreds of errors in my compile.

@COTO Here

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\[
{\overbrace{
  \begin{bmatrix}
    \begin{bmatrix}
      \vec{v}_1'\\
      \vec{v}_2'
    \end{bmatrix}
  \\
    \vec{v}_3'
  \end{bmatrix}
}^{\textrm{First}}}
\equiv
{\overbrace{
  \begin{bmatrix}
    \vphantom{
      \begin{bmatrix}
        \vec{v}_1'\\
        \vec{v}_2'
      \end{bmatrix}
     }
    \vec{v}_1
  \\
    \vec{v}_2
  \end{bmatrix}}^{\textrm{Second}}}
\]

\end{document}

@COTO Here the second question

\documentclass{article}
\usepackage{amsmath}

\newcommand{\centerthis}[3]{%
  \parbox[c][#2]{#1}{\centering #3}%
}

\begin{document}
\fbox{\centerthis{30pt}{30pt}{a}}
\end{document}

The \fbox is just to show the box.

Thanks. Let me just check. I tried \parbox before and it blew up my compiler.

\begin{equation}
\begin{array}{*{20}{c}}
\parbox[c][20pt]{20pt}{\centering \vec{v}_1}\\
\vec{v}_2
\end{array}
\end{equation}

I get the error "\vec allowed only in math mode".

Oh. But surrounding the contents in $ works.

It didn't before, or so I thought.

@COTO beside the parbox solution you can also check the adjustbox package. It has a lot of options for this sort of problems. E.g.

\fbox{\adjustbox{center=5cm,set vsize={2cm}{2cm}}{a}}

Thanks again for the help. 95% of the problem is: 1) LaTeX has absolutely no consistency in syntax, and 2) if anyone, ever, at any time, has figured out what a LaTeX error message is actually trying to say, I'll eat my hat. Missing a comma on line 6?: "Bad \endwhozits on line 981." Accidentally reversed the order of two arguments on line 226?: "I can't find environment '$\vskip@@12'!" on line 1801."

It's utterly maddening.

@UlrikeFischer: you've been poked.

@PauloCereda will look at it.

@UlrikeFischer Thank you. <3

@PauloCereda answered

@UlrikeFischer re-replied. :)

@PhelypeOleinik: you were right, there was an issue with paths, now solved. :)

@PauloCereda :)

@PhelypeOleinik You probably know the xkcd strip about kerning. :)

@PauloCereda Hahhahahhahahahha

Didn't knew this one

But I can confirm the truth here :P

@PhelypeOleinik It's accurate. :) It took me a while to divert my attention from our car license plates. :)

@PauloCereda I didn't notice the license plates...

@PhelypeOleinik have fun! :D

Now I will XD

LOL

@COTO you are thinking of it the wring way, you just need to think of things from TeX's point of view, then things are a lot more understandable, and error messages make more sense.

@CarLaTeX @DavidCarlisle @egreg youtube.com/watch?v=PTpGg60GrMg

@mickep -- this is not, sadly, a particularly active series. there is one revised edition in the works, and one new volume has been proposed, but not (yet) accepted. neither is by a russian author. but one never knows when something might show up, so don't give up hope entirely.

@Johannes_B The current horror is this years (so claimed) "carneval hit". (@PauloCereda ducks should better not look at it) youtube.com/watch?v=PP9I6WRD4VI

@Johannes_B Great Gino! But I think he terrified the child :):):)

@UlrikeFischer Honestly? wtf was that? But after 1.5 Minutes i couldn't stop laughing. So silly. :-)

@CarLaTeX The child will be in a better mood after listening to the song Ulrike just shared with me. :-p

@Johannes_B Oh my!

@barbarabeeton Thanks for that info. I will look every now and then. The books are perfect sources when our students do small projects.

@moewe, could you please shed some light on the discussion on the comments of tex.stackexchange.com/a/415013/105447 ? It seems that the use of biber's tool mode to delete some fields based on a sourcemap also silently erases other non-standard fields. I wouldn't expect this behavior, but perhaps there is something I'm missing.

@gusbrs Better ping @moewe in a comment to one of his/her answers. If @moe... does not trigger an autocompletion, the ping in chat will not work.

@samcarter, moewe did not participate on that particular question thus, afaik, I can't ping him/her from there. I thought the proper channel was the chat. You are suggesting that I do so in another arbitrary answer?

@gusbrs Pings in chat only work if the person to ping was recently in the chatroom -- otherwise it will not have any effect. Maybe you could comment on an arbitrary answer and delete the comment once he/she has seen it?

@samcarter, I see. I didn't know that, and indeed autocompletion was not triggered when I wrote the user name. Thanks for the tip!

@samcarter @gusbrs Or ask a mod, they can ping anyone in the chat if they deem the situation worth it. @JosephWright

@gusbrs As @moewe sometimes pops in the chat, I tried a ping

@ChristianHupfer If I write this sentence in the next DuckBoat: Christian Hupfer, one of our most brilliant top users, thinks that funny posts are counterproductive because they attract undeserved attention at the expense of the serious one (even though he joined the Duck Side of the Force), does it represent correctly your thought?

@CarLaTeX You'll have to specify if _counter_productive is something good or bad for our resident counter wizard :)

@samcarter LOL

@yo', @egreg, @samcarter I don't know what worked, but it did work! Thanks!

Hello every one

is there any way to write " é" without \'{e} ?

@Vrouvrou \usepackage[utf8]{inputenc} (and saving your file as UTF-8) allows for writing directly é.

how to save it please ?

as UTF-8

@egreg i use this package but it doesn't work

@Vrouvrou That depends on your editor.

texmaker

@egreg How did your exam go? Did you pass? ;-)

@marmot I made it as easy as possible.

@Vrouvrou Go to the preferences, Editor tab: set Editor Font Encoding to UTF-8