Mathematical notation in a Hugo project can be enabled by using third party JavaScript libraries.

Hugo-ray using MathJax

To enable MathJax on a per page basis include the parameter math: true in content files

Note: Use the online reference of Supported TeX Functions

Inline math

I am content, and formula is $\varphi = \dfrac{1+\sqrt5}{2}= 1.6180339887…$

Block math

$$ \varphi = 1+\frac{1} {1+\frac{1} {1+\frac{1} {1+\cdots} } } $$