breqnequationsmath-modepositioning
I've got the following code for an equation:
\begin{dmath}
x \in A - B \leftrightarrow x \in A \textrm{ and } x \not\in B
\end{dmath}
It produces the output:
The equation really doesn't need so many line breaks, the whole thing could fit on one line. I then put a frame around it to see the bounds of the equation:
Is there a way to define the bounds of a dmath equation so that it isn't crammed into a really small box and given loads of line breaks?
The mathtools package has a feature only to show the equation number for equations that are actually referenced, which seems to be what you are asking for.
However let me advise you against this, as a matter of style. Just because you don't refer to one of your equations, doesn't mean that your readers won't. It's extremely annoying as a user of a mathematical document to have to discuss with your colleagues "the 3rd unnumbered equation on page 42", or whatever, and there is really no harm in having a number for every equation in the document.
Load theorems library (I do it with class option most) and use ams or any other maths options.
ams set upper and lower parts to mathematical mode with \displaystyle. You don't need equation environments is these boxes. And you don't need valign.
\documentclass{beamer}
\usepackage[most]{tcolorbox}
\newtcolorbox{equationframe}{
math
}
\begin{document}
\begin{frame}
\begin{itemize}
\item[]
\begin{equationframe}
p(x,y)=\begin{cases}
\min\{q(x,y),\frac{\pi({y})q(y,{x})}{\pi(x)}\}, \quad x\neq y\\
1-\int_{x\neq y} p(x,y)
\end{cases}
\end{equationframe}
\begin{equationframe}
\pi(x)p(x,y)=\min\{\pi(x)q(x,y),\pi(y)q(y,x)\}=\pi(y)p(y,x)%
\end{equationframe}
\end{itemize}
\end{frame}
\end{document}
Update: ams equation*, ams align*:
Instead of math, tcolorbox also offers some other mathematical boxes: ams equation, ams align, ams gather, ...
\documentclass{beamer}
\usepackage[most]{tcolorbox}
\begin{document}
\begin{frame}
\begin{tcolorbox}[ams equation*]
p(x,y)=\begin{cases}
\min\{q(x,y),\frac{\pi({y})q(y,{x})}{\pi(x)}\}, \quad x\neq y\\
1-\int_{x\neq y} p(x,y)
\end{cases}
\end{tcolorbox}
\begin{tcolorbox}[ams nodisplayskip, ams align*]
\pi(x)p(x,y) & =\min\{\pi(x)q(x,y),\pi(y)q(y,x)\}\\
& =\pi(y)p(y,x)%
\end{tcolorbox}
\end{frame}
\end{document}
Best Answer
I believe that
breqnmakes more problems that it solves. By default, every relation symbol indmathmarks a line break point for alignment. Those you don't want should be hidden. Choose one of the methods below.Note that
\not\inproduces a wrong symbol and\notinshould be used; this doesn't depend onbreqn.