Marco Benini

Monomorphisms as limits

Sometimes it is useful to think to monomorphisms as limits of a category. Let be a monomorhism, i.e., for every pair of arrows , if , then . This is … Continue reading

April 4, 2011 · Leave a comment

Order (and small disorder)

In most textbooks, one finds that a category represents a preorder exactly when there is at most one arrow between any pair of objects. But, surprisingly, the same is told … Continue reading

March 29, 2011 · Leave a comment