# newcommand¶


$$\def\RR{{\bf R}} \def\bold#1{{\bf #1}}$$


defines a macro \RR that produces a bold “R”, while \bold{math} typesets its argument using a bold font. See Defining TeX macros for more information.


window.MathJax = {

Alternatively, use \require{newcommand} in a TeX expression to load it dynamically from within the math on the page, if the require package is loaded.