Using LaTex, how can I typeset 2pii in the following formula (as shown on the MathJax's home page but they are using MathML). I tried 2\pii and 2\pi\i but, as suspected, that did not work.
[Tex/LaTex] How to typeset 2pii in LaTeX
amsmathtypography
Related Solutions
I don't think there is a unique proper way of doing this.
There is the operator $\min$ which might be appropriate here.
In order to define your own operators, consider using \DeclareMathOperator{\Minimum}{Minimum} from amsmath to be able to use $\Minimum U_\mathrm{res}$. Using the operator will give you suitable spacing around the operator, just as you have with i.e. \sin.
If you need something you can simply throw the sympy-produced equations into, then you can try breqn package. It handles all \lefts and \rights automatically, but, as expected, it will not do wonders and the output will never be as good as a manually tuned one. It also has some clashes which you have to take care of.
\documentclass{article}
\usepackage{amsmath}
\usepackage{breqn}
\begin{document}
\begin{dmath*}
X''(x) = \left(- 2 C_{1} \sqrt{\lambda} \sin{\left (\sqrt{\lambda} x \right )} -
C_{1} \lambda \cos{\left (\sqrt{\lambda} x \right )} +
C_{1} \cos{\left (\sqrt{\lambda} x \right )} +
2 C_{2} \sqrt{\lambda} \cos{\left (\sqrt{\lambda} x \right )} -
C_{2} \lambda \sin{\left (\sqrt{\lambda} x \right )} +
C_{2} \sin{\left (\sqrt{\lambda} x \right )}\right) e^{x}
\end{dmath*}
\end{document}
Best Answer
TeX and LaTeX macros whose names consist of a backslash character (
\) followed by one or more letters (i.e.,athruzandAthruZ-- known in TeX jargon as category-code-11characters) -- such as\pi-- must be followed by a non-category-11character if TeX is to figure out when the end of the macro's name is reached. Thus, expressions such as\pi\approx3.14159,\pi/2,{\pi}iand\pi{}iare valid syntactically, but\piiis not.The simplest solution is to write
2\pi i. This is valid because whitespace has category code10, not11.