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Introduction to Category Theory 4: Internal Features of Categories

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Published on Sep 17, 2012

Following the previous lecture, which discussed operations between categories, introduced some interesting features within a single categorically. Specifically, looked at categorical generalizations / analogues of the injectivity, surjectivity, and bijectivity, as well as (co-)products and pullbacks. Hinted at Yoneda and (co-)limits, to be covered in the next few lectures.

Proof that hTop is not concrete: http://tac.mta.ca/tac/reprints/articl...

This is a University of Reddit course. The course page may be found at http://ureddit.com/class/36451/, and the official discussion site at http://www.reddit.com/r/URIntroCatego....

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