As far as I know, glyphs are determined by the font and rendering engine. They're not in the Unicode standard.
Fraktur (font) and italic (rendering) are in the Unicode standard, although Hackernews will not render them. (I suspect that the Hackernews software filters out the nuttier Unicode stuff.)
alt Hacker News
Fraktur (font) and italic (rendering) are in the Unicode standard, although Hackernews will not render them. (I suspect that the Hackernews software filters out the nuttier Unicode stuff.)