spacing
When trying to use the mod function that LaTeX offers, I always meet a problem: it seems to have a space or two in front of it that I can't delete without \hspace. Why is that and how can I fix it?
What shows up: $(\mod n)$
What I want: $(\hspace{-0.3cm}\mod n)$
To ensure that white space is produced even at points in the document where page breaking takes place or at the top or bottom of a page one should replace \vspace by \vspace*.
At the beginning of a page \topskip is inserted, normally \topskip=10pt. Setting topskip=0pt and \offinterlineskip will produce identical results both for vspace and vscpace*.
\documentclass{article}
\usepackage{showframe}
\begin{document}
\topskip=0pt \offinterlineskip
\vspace*{0pt}%
ASDF
\end{document}
\offinterlineskip is macro to prevent interline glue globally. Try running both examples to see the difference.
\documentclass{article}
\usepackage{showframe}
\begin{document}
\topskip=0pt %\offinterlineskip
\vspace*{0pt}%
ASDF
\end{document}
It's a problem of : being an active character in the Turkish language for babel, and gobbling other bits of the document.
There was a similar problem being discussed in a similar question here a few years ago. Credit to egreg for the answer, which is to add the line
\shorthandoff{:}
to disable the active character, and just use Unicode to enter Turkish characters. You can add
\shorthandon{:}
% some stuff here
\shorthandoff{:}
Here's a MWE:
\documentclass{article}
\usepackage[turkish]{babel}
\begin{document}
\shorthandoff{:}
\flushleft
\textbf{ALongWord:} \\
\textbf{ALongWord :} \\
\textbf{ALongWord \qquad:} \\
\textbf{ALongWord \qquad\qquad:} \\
\textbf{ALongWord \qquad\qquad\qquad\qquad:}
\end{document}
Here's the effect:
Best Answer
See section 5.2 of the
amsmathmanual for the details of\modand related commands (\mod,\pmod,\bmod,\pod) but the short version is that if you want parens around it, you should use\pmod: