<!DOCTYPE html> <html lang=β€œ{{ page.lang | default: site.lang | default: ”enβ€œ }}”> {%- include head.html -%} <body>

{%- include header.html -%}

<main class="page-content" aria-label="Content">
    <div class="wrapper">
        {{ content }}
    </div>
</main>

{%- include back-to-top.html -%}

{%- include footer.html -%}

{% if site.mathjax.enable %}
    {%- include mathjax.html -%}
{% endif %}

</body> </html>