I combined knowledge from build-blog-jekyll-github-pages and running a website locally to enable work both locally and online…

To add math equation to Jekyll blog: refer add-mathjax-to-jekyll-pages

Here’s the example after inserting MathJax: $r = h = \sqrt{\frac {1} {2}} = \sqrt{\frac {N} {N+1}} \sqrt{\frac {N+1} {2N}}$

Other useful documents:

• markdown cheatsheet
• latex expression
• dynamic preview of mathjax