MathJax = { loader: { load: ['input/tex-base', 'output/svg', '[tex]/autoload'] }, tex: { packages: { '[+]': ['base', 'autoload'] }, autoload: { boldsymbol: ['boldsymbol'] }, inlineMath: [ ['$', '$'] ], displayMath: [ ['$$', '$$'] ], processEscapes: true, processRefs: true } } 準備 \usepackage{xparse} …