The underline char has to be escaped when the char before it is not alpha or number.

[chaoticlonghair]

Description

• The following code¹ doesn't work:

  Computable function $+_{E}$ such that: $c_{1} +_{E} c_{2} = E_{pk}(a + b)$.
  

  I checked this piece of code in MathJax live demo, it works well.

  Preview with GitHub-flavored Markdown:

  • Computable function $+{E}$ such that: $c{1} +{E} c{2} = E_{pk}(a + b)$.

• But it works well with escape characters:

  Computable function $+\_{E}$ such that: $c_{1} +\_{E} c_{2} = E_{pk}(a + b)$.
  

  Preview with GitHub-flavored Markdown:

  • Computable function $+_{E}$ such that: $c_{1} +_{E} c_{2} = E_{pk}(a + b)$.

I found the issue exists in GitHub-flavored Markdown, too.

Maybe I should post this issue to the related dependency library, but I don't have enough Ruby experiences to find that library.

Footnotes

1. This computable function is copied from the paper "Fast Multiparty Threshold ECDSA with Fast Trustless Setup". ↩