Re: Famous unsolved problems in ordinary category theory

A student asked them twice "Aren't problems just so nice? They get stuck in your hair And the last one's just so rare .." "Like lice." said they with a grin "Our hair is all gone and thin ... And Categories we espouse Rather than such vermin house!" -very anon [For admin and other information see: http://www.mta.ca/~cat-dist/ ]