On: A comment on Hacker News led to 4½ new Unicode cha...

[billpg]

We need...

  1. A code-point that starts a fraction.    
  2. A code-point that separates the numerator from the denominator.    
  3. A code-point that ends the fraction.    

So the sequence [START]x[SEP]y[END] would be rendered with x above the y with a line separating.

[START][START]x[SEP]y[END][SEP]z[END] would be a fraction with a fraction inside.

[slavik81 → billpg]

The fraction slash (U+2044) was supposed to be a simpler version of that, but it's not very well supported. https://en.wikipedia.org/wiki/Unicode_subscripts_and_supersc...