<head>
{% if site.google_analytics != "" %} {% include ga.html %} <script type="text/javascript" src="{{ '/assets/js/analytics.js' }}"></script> {% endif %} {% if site.mathjax == "enable" %} <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script> <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script> {% endif %} <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> {% seo %} <link rel="stylesheet" href="{{ '/assets/css/main.css' | relative_url }}">
</head>