[HoTT-reading-group] Type of pointed types
J. Ian Johnson
ianj at ccs.neu.edu
Tue Jan 21 11:34:05 EST 2014
Those are equivalent. 1 -> A is the morphism way of writing a constant. A pointed type is simply a type that has something in it, i.e., proof that it's inhabited.
-Ian
----- Original Message -----
From: "Joe Hannon" <hannon at math.bu.edu>
To: hott-reading-group at mit.edu
Sent: Tuesday, January 21, 2014 11:09:43 AM GMT -05:00 US/Canada Eastern
Subject: [HoTT-reading-group] Type of pointed types
On page 89 definition 2.1.7 gives the type of pointed types as Sum_A:U A. Is this right? It seems like a term in this type is just a term in some A. I would've guessed Sum_A:U 1 -> A or something. Or maybe these are equal?
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