Version 0.2 of BooleanAlgebrasIntros2 (bool2 for short) culminates with a formalization of Roman Sikorski's Homomorphism Extension Criterion.

To compile this version, you need a version of Coq 8.4 installed on your computer, available at https://coq.inria.fr/.

In the current directory, type "make", and within a few minutes the release will compile.

Object files are pretty harmless in themselves, but for a discussion of some secondary safety issues relating to this (and a fanciful explanation of it), read
the file index.html in this directory.  

Best wishes, and I hope this development brings you joy.

--Daniel Wyckoff

dwyckoff76@remove.the.obvious.hotmail.notmail.com

