I have a LyX document filled with text and equations like in a scientific paper. To focus only on the math sometimes it can be really useful to only print/output the formulas and not the text around it. Is there any way to do this automatically in LyX? So far I manually copy all the equations but that is not convenient in the long run. All equations are numbered and centered in the math mode.
[Tex/LaTex] Print/Output only Equations/Math Formulas of a Given LaTeX or LyX Document
lyxmath-modeoutput
Related Solutions
[Something of an extended comment]
Lyx can handle a variety of math mode items, but where it cannot handle them you have to insert raw LaTeX code ('ERT'). Other than extending the Lyx binary, there is not much that can be done here. (Even then, there will still be limits to what Lyx can handle.)
You can define your own symbol:
\documentclass{article}
\usepackage{amsmath}
\DeclareMathSymbol{\subfactorial}{\mathord}{operators}{"3C}
\begin{document}
\begin{equation}
\begin{aligned}
n!=\sum_k h(n,k) &= \sum_k \binom{n}{k}(n-k)\subfactorial\\
&=\sum_k\binom{n}{k}k\subfactorial
\end{aligned}
\tag{5.49}
\end{equation}
\end{document}
This will work so long as the "operators" font is OT1 encoded. Should it be T1 encoded, change "3C" into "BD (this might depend on your font settings).
The equation (same number) is taken from "Discrete Mathematics", by Graham, Knuth and Patashnik (the original uses Euler fonts, but the result is quite similar).
Best Answer
try with the following in the preamble:
then it generates a new file with the chosen contents.