commands.tex (502B)
1 \documentclass[10pt,a5paper]{article} 2 \usepackage[utf8]{inputenc} 3 \usepackage{amsmath} 4 \usepackage{amsfonts} 5 \usepackage{amssymb} 6 \usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry} 7 8 9 \newcommand{\myvec}[2]{({#1}_1,{#1}_2,\dots,{#1}_{#2})} 10 \newcommand{\myvecn}[1]{\myvec{#1}{n}} 11 12 \newcommand{\myvecopt}[2][n]{({#2}_1,{#2}_2,\dots,{#2}_{#1})} 13 \providecommand{\vec}[1]{\overleftarrow{#1}} 14 15 \begin{document} 16 17 \[ 18 \vec{v}=\myvecopt{v} 19 \] 20 21 later... 22 23 \[ 24 \vec{w}=\myvecopt[10]{w} 25 \] 26 27 \end{document}