Site for learnmath learnmath.github.io is the official website of the Learn You Some Algebra (LYSA) book. It is written in Facebook's statically typed Hack programming language, and meant to show off the LYSA book and provide links to nightly builds of the pdf. The website is currently maintained by DTSCode. Comments, questions, and concerns should be directed to him, either by email (DTSCode@gmail.com), lm.github.io issues, or contacting him in #learnmath:irc.freenode.net.