Wed Jan 10 -- NO CLASS FRIDAY OR MONDAY
The opposite category to a category.
Terminal objects. Which are...
"Unique up to unique isomorphism." Some examples. Initial objects.
Given A,B in Obj(C), we defined a category CA,B where a terminal object is a product of A and B.
Coproducts.
Coproduct in Set = disjoint union.
Coproduct in Set* = disjoint union with basepoints amalgamated.
Coproduct in Grp = free product of groups.
No class on Friday (I am attending a funeral) or Monday (MLK birthday), so see you next Wednesday.
Terminal objects. Which are...
"Unique up to unique isomorphism." Some examples. Initial objects.
Given A,B in Obj(C), we defined a category CA,B where a terminal object is a product of A and B.
Coproducts.
Coproduct in Set = disjoint union.
Coproduct in Set* = disjoint union with basepoints amalgamated.
Coproduct in Grp = free product of groups.
No class on Friday (I am attending a funeral) or Monday (MLK birthday), so see you next Wednesday.
posted by Allen Knutson @ 5:16 PM
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