CIRCLE WITH A DOT

@bradlarsen i have a scala implementation that does this: https://github.com/non/antimirov

the real goal was being able to test regexes for equality/inclusion (i.e. subset/superset). it uses partial derivatives of regular expressions to try to do this efficiently. it does fairly well most of the time but in the worst case it is very slow

@jschauma yeah i was going to mention this too. when i taught myself how to use *nix (netbsd in my case) there weren't yet reliable search engines or web pages with the same info, so i got in the habit of reading man pages for everything @b0rk

@rose_alibi everyone loves sharing their grades with a sloppy lab partner that randomly inserts walls of poorly-sourced text mixed with outright lies into the term paper