∑ Xah Lee 李杀 is a user on mstdn.io. You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.

∑ Xah Lee 李杀 @xahlee@mstdn.io

today. Discontinuous Groups of Rotation and Translation in the Plane
your need about 5 hours to study this. After that, you'll have good understanding.
This i wrote in 1997, but is the most cited by professors and academic papers.
xahlee.info/Wallpaper_dir/c0_W

this keyboard needs love it deserves.
XMIT Hall Effect Switch Keyboard
xahlee.info/kbd/hall_effect_sw

Browser console today, is more sophisticated than full-fledged Java IDE. And probably 10 times more complicated to implement too.

here's 2 different web design of navigation panel. The 1 with scroll bar is better. because, if not, when doc is long, the left side is blank, and needs to scroll all the way to the top to use it.

A twist of love, Gives us hate, A poison of midnight, Dementia in space.

Midnight Poison ♪ Space Dementia
xahmusic.org/piano/Midnight_Po

that's Eva Green

MX Master mouse has newer version, called 2s.
also, added a video that shows how the auto ratchet/spin wheel works.
xahlee.info/kbd/logitech_mx_ma

a great innovation with thumb bar is this NeXT Keyboard.
xahlee.info/kbd/NeXT_computer_
Not sure if it's Steve Job's idea. Doesn't seem to be picked up.

A very weird keyboard. But the thumb keys are actually nice.
amzn.to/2Hf3ltx

341 screenshots of Second Life, 2007 to 2013. good old days.
xahsl.org/sl/index_thumbnails.

toroidal map in real life. who'd thought?

search. Now you can type 2 words e.g. “heart face”, and it'll search them like AND.
xahlee.info/comp/unicode_index