* a fantastic simplification of our subject
@ 1998-04-04 15:42 Peter Freyd
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From: Peter Freyd @ 1998-04-04 15:42 UTC (permalink / raw)
To: barr, categories
I can't make Mike's proof type-check, so let me try the following:
For any set-valued functor, T, from any category, let a:O -> T
be the unique transformation from the empty functor. Isn't it
obviously cartesian? Has Mike shown all set-valued functors are
empty?
Good heavens.
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1998-04-04 15:42 a fantastic simplification of our subject Peter Freyd
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