FOM: Forgetful functors (query)

Stephen Fenner fenner at
Tue May 1 14:11:44 EDT 2001

Dear FOMers,

Does anyone know if there is a precise, pure category theoretic
criterion/definition for when a functor is forgetful?  If this is
well-known, please reply off the list, thanks.  If it's not
well-understood, it seems like this is a good f.o.m. question.

Thanks in advance.


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