@Anthony_Bonato
Is category theory actually useful for anything? I’ve found it to be impenetrably esoteric. The only parts of it I can actually understand are extremely obvious. Am I missing something?
@Anthony_Bonato
Yes! As things get simplified, they also get condensed. To express the same content with equations and sentences, you might need a page or two and not be more enlightened at the end. Same effect that makes algebraic notation express pithily what took clumsy paragraphs before.
@Anthony_Bonato
I think if you’re looking at something specific like principal fiber bundles you’re not *really* doing category theory anyway. You’re just looking at an example.
@Anthony_Bonato
One of the most memorable talks I have l l attended was by a postdoc at AIS whose main result was the equivalence of two categories. The talk was 45 mins and 35 of them were dedicated to proving that the map he introduced was well-defined.