Math Engine SsKaTeX
This math engine was built-in until kramdown 2.0 and since then is available through the
kramdown-math-sskatex gem.
This math engine uses a server-side installation of KaTeX to convert TeX math formulas into HTML+MathML. This eliminates the need for client-side math-rendering Javascript. Consider this a flexible for-trusted-users-only alternative to the KaTeX math engine and a lightweight efficient alternative to Mathjax-Node.
See https://github.com/kramdown/math-sskatex for documentation!