math-modesymbols
To have + and – sign together, I used math mode, but that did not work, as I only get s.e.m as output without the symbols before. The error message says "undefined control sequence, package inputenc error`
The code I used is this ($\±$ s.e.m.)`", any help?
I'd avoid loading mathabx just in order to get a square bullet:
\documentclass{article}
\usepackage{enumitem}
\DeclareRobustCommand{\sqbullet}{%
\raisebox{.3ex}{\rule{.3em}{.3em}}%
}
\setlist[itemize,2]{label=\sqbullet} % similar to \renewcommand{\labelitemii}{\sqbullet}
\begin{document}
\begin{itemize} % first level
\item \textbf{Registros Vectoriales}
\begin{itemize} % second level
\item Contienen los operandos vectoriales
\end{itemize}
\end{itemize}
\end{document}
I wouldn't use \limits in this case since it'll end up placing the lower and upper limits of the sequence below and above the right-hand curly brace -- probably not what you intended.
If you write \{h_{n}\}_{0}^{\infty}$ (see the middle example below, labelled "not awful"), the upper and lower limits may look like they're too close to each other, especially in text-style math mode. One way to fix this is to encase the closing curly brace, \}, in a pair of braces to change its status from "math-close" to "math-ordinary"; doing so will loosen the spacing quite a bit.
It may be best, though, to define a custom macro called, say, \seqwlimits to standardize the task at hand and to assure adequate vertical separation of the upper and lower limits.
\documentclass{article}
\newcommand\seqwlimits[3]{\{#1\}_{\mathstrut#2}^{\mathstrut#3}}
\begin{document}
\begin{tabular}{ll}
huh?? & ${\{h_{n}\}}\limits_{0}^{\infty}$\\[2ex]
awful & $\{h_{n}\}\limits_{0}^{\infty}$\\[2ex]
not awful& $\{h_{n}\}_{0}^{\infty}$\\[2ex]
better & $\{h_{n}{\}}_{0}^{\infty}$\\[2ex] % note the extra { and }
best & $\seqwlimits{h_n}{0}{\infty}$\\
\end{tabular}
\end{document}
Best Answer
Use
$\pm$to print + and - sign together.