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Stream: learning: questions

Topic: right adjoints are accessible


view this post on Zulip Daniel Teixeira (May 09 2024 at 13:35):

I was trying to prove that right adjoints between locally presentable categories are accessible i.e. preserve filtered colimits. But this is silly and proving that right adjoints in general preserve colimits in general :melt: , where is the mistake?

image.png

(then yoneda)

view this post on Zulip Frank Tsai (May 09 2024 at 13:52):

Unless xx is tiny, the first equation does not hold: the hom functor sends colimits in the first variable and limits in the second variable to limits.

view this post on Zulip Daniel Teixeira (May 09 2024 at 13:54):

I see ty, that my lead to the solution of what I wanted too