Talk:Monoid (category theory)

History monoid
From what I'm reading, the history monoid is the categorical product in the category of monoids. Although I want to put this notation into this article, I'm somewhat nervous doing so, as the statement is coming from a computer science book rather than a category theory book. I have not yet personally verified that it really does satisfy all the needed morphism properties; maybe after lunch .... linas 17:27, 22 April 2007 (UTC)

1 in diagrams is not defined
1 is used in diagrams but is not defined nor even mentioned in the text. WillNess (talk)
 * . D.Lazard (talk) 15:40, 26 June 2021 (UTC)