delimiters
I am trying to write one set of equations implying the next, inline with text. What I would like to do is something like the following:
\documentclass{article}
\begin{document}
And so,
\(\left. \begin{array}[t]{l}
a \\
b \\
c
\end{array} \right\}
\Rightarrow \left. \begin{array}[t]{l}
d \\
e \\
f
\end{array} \right\}\)
\end{document}
But instead of producing the desired result (bottom) it produces the top one.
Is there a different symbol I can use other than \}?
Scott Pakin's Comprehensive LaTeX Symbol List identifies the structure of extensible delimiters in section 8.2 Resizing symbols (p 100-102):
All variable-sized delimiters are defined (by the corresponding
.tfmfile) in terms of up to five segments, as illustrated by Figure 1 on page 102. The top, middle, and bottom segments are of a fixed size. The top-middle and middle-bottom segments (which are constrained to be the same character) are repeated as many times as necessary to achieve the desired height.
This is merely informative since I am unfamiliar with the procedure of how to create these things in a .tfm file.
Conveniently, scalerel provides \scaleleftright[<max width>]{<left obj>}{<stuff>}{<right obj>} (and a comparable \stretchleftright) for scaling/stretching both <left obj> and <right obj> to the height of <stuff> (constrained, if required and optional, to a width of <max width>). Here's a quick example:
\documentclass{article}
\usepackage{scalerel}% http://ctan.org/pkg/scalerel
\begin{document}
\[ \stretchleftright{\dagger}{\displaystyle\sum_{i=1}^n i}{\dagger} \]
\[ \scaleleftright{\dagger}{\displaystyle\sum_{i=1}^n i}{\dagger} \]
\end{document}
I suggest pursuing a less-than-fully-automatic approach to sizing the outer curly braces. In the code below the default size of the outer curly braces is \big, but this may be changed by specifying an optional sizing-related parameter, which may take on values Bigg, bigg, Big (and, of course, big). I favor a minimum size of big (rather than normalsize) as IMNSHO, the curly braces simply need to "look" a bit more prominent.
In the following screenshot, the curly braces in the first example are of size \big (the default); they are of size \bigg in the second, where \displaystyle is in effect for the second row.
\documentclass{article}
\usepackage{mathtools} % for '\DeclarePairedDelimiter' macro
\DeclarePairedDelimiter{\abs}{\lvert}{\rvert} % "absolute value" macro
\newcommand\Setst[3][big]{\csname #1l\endcsname\{ #2 :
\begin{array}[t]{@{}l@{}}#3\csname #1r\endcsname \}\end{array}}
\begin{document}
\[
\Setst{f}{\text{$f(t)>0$ for all $t$ with $0<t<1$}\\
\text{and }\abs[\big]{\int_0^1 e^{-\frac{1}{2}t^2}\!f(t)\,dt}\leq1}
\]
\[ % use \displaystyle directive in second row; hence, use "bigg" curly braces
\Setst[bigg]{f}{\text{$f(t)>0$ for all $t$ with $0<t<1$}\\
\displaystyle \text{and }\abs[\bigg]{\int_0^1 e^{-\frac{1}{2}t^2}\!f(t)\,dt}\leq1}
\]
\end{document}
Best Answer
It's fiddly, but it works. Using
abracesyou can align the entire construction vertically and then rotate/move it into place: