In my computer, the LaTeX alternative is the only correct one, in which the slash overlays the angle bracket:
- Poor-man's: 1≯ 2
- Unicode: 1≯2
- HTML: 1≯2
- LaTex: <math>a \ngtr b</math>
My cellphone renders the symbol better:
See WP for further discussion:
https://en.wikipedia.org/wiki/Talk:Inequality_(mathematics)#Renderization_of_%22not_greater_than%22_symbol