770
I prefer Wayland (.social) though
(media.kbin.social)
Context: Twitter is currently rebranding it self as X.com, which is the bottom logo. X.org is a FOSS implementation of the The X Window System which is being slowly replaced by the newer Wayland display server. Because of the Twitter rebrand Someone decided to make Wayland.social, to parody the X.org to Wayland transition.
I kinda wonder what makes it "mathematical"
In set theory, this style, blackboard bold is used to represent "special sets", for example the set of all integers
Now I remember exactly what you mean
The fancy line that barely distinguishes it from any other X, capital or not or maybe with a wiggly line, so you get extra confused in your proof on line 13 or something.
Probably used in vector notation and gauge fields