He means "algebra" in the "universal algebra" sense of the word: http://en.wikipedia.org/wiki/Universal_algebra http://en.wikipedia.org/wiki/Universal_algebra

He means "algebra" in the "universal algebra" sense of the word: http://en.wikipedia.org/wiki/Universal_algebra http://en.wikipedia.org/wiki/Universal_algebra That probay doesn't clarify the connection, but at least you'll be pointed in the right direction! :)