PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
[parent] Viewing Message
``Re: Category of Sets, according to MacLane'' by yark on 2008-06-12 05:07:28
jkauzlar writes:

> the texts I looked at don't make it especially clear why,
> if the arrows represent morphisms between objects (sets),
> then why every set doesn't point to every other set

There is no function from a non-empty set to the empty set.
[ reply | up | top ]
Interact
reply