To answer your question: there is no single answer. Even at our Mathematics department, for the first grade students, there are two professors of linear algebra, one uses $\bm{v}$
(bold math from bm
package), the other one uses $\vec{v}$
.
I would not use bar for complex numbers, because $\bar{z}$
often denotes the conjugate of $z$
. I think that you should always make clear in the text whether you are real or complex.
Generally: In my opinion, you can use whichever notation you want, as far as you use it consistently in the whole work, and make clear (in Table of Notations in the Preface, or in the Introduction) what notation you use.
Two examples with txfonts
and esint
, both provide the \ointctrclockwise
macro, but look different. There is \ointclockwise
as well.
\documentclass{article}
\usepackage{txfonts}
\begin{document}
$\ointctrclockwise\limits_{\Gamma} x \mathrm{d}\gamma$
\end{document}
esint
version:
\documentclass{article}
\usepackage{esint}
\begin{document}
\[\ointctrclockwise\limits_{\Gamma} x \mathrm{d}\gamma\]
\end{document}
Best Answer
According to the symbols document (
texdoc symbols
on a TeX Live system), you can use theesint
package. Thetxfonts
also have them but they have other problems.MnSymbol
also have them but does not suit most fonts.