symbols
I want to create the symbol Aaron Turon used as a vertical separator on his thesis title page. I think it is typeset like normal text and is not an external Image. It looks like two integral symbols rotated into a horizontal shape. This is his Thesis.
And this is the titlepage:
Does anyone know how to typeset the symbol?
I recommend using a vertically centered colon which matches the equal sign better, such as \vcentcolon from the mathtools package. You can also change it generally to vertical by \mathtoolsset{centercolon}.
Compare standard :=
to the vertically centered:
So your definition could become
\usepackage{mathtools}
\newcommand{\defeq}{\vcentcolon=}
\newcommand{\eqdef}{=\vcentcolon}
with tighter spacing. And since both symbols are already relation symbols, as egreg said, we even could omit \mathrel.
And you could do that even easier by mathtools provided commands:
\documentclass{article}
\usepackage{mathtools}
\begin{document}
$a\coloneqq b \qquad b\eqqcolon a$
\end{document}
The turnstile package provides
\turnstile[<size>]{<lvert>}{<horz>}{<below>}{<above>}{<rvert>}
where <horz> calls the macro
\makehor{<line type>}{<thickness>}{<length>}{<sep>}
to draw the horizontal line(s) of the turnstile. In the following code, I've redefined \makehor (and consequently also \turnstile) to take a first argument w (for wavy) which typesets the symbol $\sim$ as the "horizontal line". The adjustbox package provides some clipping and resizing.
\documentclass{article}
\usepackage{turnstile}% http://ctan.org/pkg/turnstile
\usepackage{adjustbox}% http://ctan.org/pkg/adjustbox
\renewcommand{\makehor}[4]
{\ifthenelse{\equal{#1}{n}}{\hspace{#3}}{}
\ifthenelse{\equal{#1}{s}}{\rule[-0.5#2]{#3}{#2}}{}
\ifthenelse{\equal{#1}{d}}{\setlength{\lengthvar}{#2}
\addtolength{\lengthvar}{0.5#4}
\rule[-\lengthvar]{#3}{#2}
\hspace{-#3}
\rule[0.5#4]{#3}{#2}}{}
\ifthenelse{\equal{#1}{t}}{\setlength{\lengthvar}{1.5#2}
\addtolength{\lengthvar}{#4}
\rule[-\lengthvar]{#3}{#2}
\hspace{-#3}
\rule[-0.5#2]{#3}{#2}
\hspace{-#3}
\setlength{\lengthvar}{0.5#2}
\addtolength{\lengthvar}{#4}
\rule[\lengthvar]{#3}{#2}}{}
\ifthenelse{\equal{#1}{w}}{% New wavy $\sim$ definition
\setbox0=\hbox{$\sim$}%
\raisebox{-.6ex}{\hspace*{-.05ex}\adjustbox{width=#3,height=\height}{\clipbox{0.75 0 0 0}{\usebox0}}}}{}
}
\begin{document}
\[
\renewcommand{\arraystretch}{2}%
\begin{array}{ll}
\textrm{Regular}\ \verb!s! & \textrm{Wavy}\ \verb!w! \\ \hline
A\turnstile{s}{s}{}{}{n}B & A\turnstile{s}{w}{}{}{n}B \\
A\turnstile{s}{s}{L}{}{n}B & A\turnstile{s}{w}{L}{}{n}B \\
A\turnstile{s}{s}{}{D}{n}B & A\turnstile{s}{w}{}{D}{n}B \\
A\turnstile{s}{s}{L}{D}{n}B & A\turnstile{s}{w}{L}{D}{n}B
\end{array}
\]
\end{document}
The main advantage of tapping into the existing command (or extending it) rather than writing one's own is that it is easier to use. Additionally, since \turnstile takes the upper/lower letters as arguments, it's easier to grab hold of them than (say) defining a new command that requires some interpretation of limit use, like \wavyturn_{L}^{D} (say). As such, the other features of \turnstile is adopted (like the \rule for the vertical line and the other spacing.
The above code currently only works for a single wavy line. However, if needed, it could be extended to work for more than one (like the original \turnstile..{d}... and \turnstile..{t}.. commands). For now, it works based on the MWE, but not work as expected with other variations (longer phrases and/or right vertical line). That may require more work, since I haven't tested it.
Edit: Admittedly my tikz-prowess requires a heavy boost of steroids. The following addition to the turnstile horizontal rule is provided by the symbol z. It draws a thin wavy line using a sine curve. I'm pretty sure the horizontal (\hspace) and vertical (\raisebox) adjustments can be done inside \tikz, so suggestions are welcome and encouraged. The same goes for the adjustbox modifications, and whether that can be incorporated in \tikz as well:
\documentclass{article}
\usepackage{turnstile}% http://ctan.org/pkg/turnstile
\usepackage{tikz}% http://ctan.org/pkg/pgf
\usepackage{adjustbox}% http://ctan.org/pkg/adjustbox
\renewcommand{\makehor}[4]
{\ifthenelse{\equal{#1}{n}}{\hspace{#3}}{}
\ifthenelse{\equal{#1}{s}}{\rule[-0.5#2]{#3}{#2}}{}
\ifthenelse{\equal{#1}{d}}{\setlength{\lengthvar}{#2}
\addtolength{\lengthvar}{0.5#4}
\rule[-\lengthvar]{#3}{#2}
\hspace{-#3}
\rule[0.5#4]{#3}{#2}}{}
\ifthenelse{\equal{#1}{t}}{\setlength{\lengthvar}{1.5#2}
\addtolength{\lengthvar}{#4}
\rule[-\lengthvar]{#3}{#2}
\hspace{-#3}
\rule[-0.5#2]{#3}{#2}
\hspace{-#3}
\setlength{\lengthvar}{0.5#2}
\addtolength{\lengthvar}{#4}
\rule[\lengthvar]{#3}{#2}}{}
\ifthenelse{\equal{#1}{w}}{% New wavy $\sim$ definition
\setbox0=\hbox{$\sim$}%
\raisebox{-.6ex}{\hspace*{-.05ex}\adjustbox{width=#3,height=\height}{\clipbox{0.75 0 0 0}{\usebox0}}}}{}
\ifthenelse{\equal{#1}{z}}{% New tikz wavy definition
\raisebox{-.4ex}{\hspace*{-.08ex}\tikz \draw [thin,x=0.5ex,y=.25ex] (0,0) sin (1,1) cos (2,0) sin (3,-1) cos (4,0);\hspace*{.2ex}}}{}
}
\begin{document}
\[
\renewcommand{\arraystretch}{2}%
\begin{array}{lll}
\textrm{Regular}\ \verb!s! & \textrm{Wavy}\ \verb!w! & \textrm{TikZ}\ \verb!z! \\ \hline
A\turnstile{s}{s}{}{}{n}B & A\turnstile{s}{w}{}{}{n}B & A\turnstile{s}{z}{}{}{n}B \\
A\turnstile{s}{s}{L}{}{n}B & A\turnstile{s}{w}{L}{}{n}B & A\turnstile{s}{z}{L}{}{n}B \\
A\turnstile{s}{s}{}{D}{n}B & A\turnstile{s}{w}{}{D}{n}B & A\turnstile{s}{z}{}{D}{n}B \\
A\turnstile{s}{s}{L}{D}{n}B & A\turnstile{s}{w}{L}{D}{n}B & A\turnstile{s}{z}{L}{D}{n}B
\end{array}
\]
\end{document}
It needs improvement for a number of reasons:
There is a very minute difference in the typesetting of a "denominator-only" and "numerator+denominator" \turnstile. For example, look at the close-up between
Unexpected results may occur from adding the ending vertical line(s).
The spacing of the right operand (B in this case) is too far off. This can be accommodated by means of an intermediate macro, but it is best suited inside the \turnstile macro.
I think all of the above items would be addressed by someone with a better handle on tikz-related commands. But then again, perhaps this is not a problem.
Best Answer
This one looks like
adfornn° 21:You might also want to take a look at PGFOrnament and PSVectorian.