Custom symbols
Dependency: siunitx
Custom symbol
\newmathsymbol{\fE}{f_\mathrm{E}}Custom functions
Norm
\newcommand{\norm}[1]{\left\lVert{}#1\right\rVert}Absolute value
\newcommand{\abs}[1]{\left\lvert{}#1\right\rvert}Better vectors
Stretch vector arrow as wide as the elements it spans
\renewcommand{\vec}{\vv}Sources:
Related:
Tags: Values - Standardize math, numbers, symbols, quantities, money