nLab
unitoid

A unitoid is a magma with an identity element.

The term was used by Postnikov in his 1980s course on homotopy theory; an H-space is a homotopy unitoid. But the terminology is not standard, and ‘unitoid’ has been applied to other concepts.

Created on November 15, 2009 at 19:30:40. See the history of this page for a list of all contributions to it.