University of Birmingham > Talks@bham > Cargo > Weak toposes: part 2

Weak toposes: part 2

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If you have a question about this talk, please contact Auke Booij.

After the development of Beck’s theorem that we discussed in the previous weeks, we are now ready to dive into weak toposes.

Every topos is a weak topos. We aim to prove that every weak topos is also a topos. Along the way, we will be able to show many properties of toposes: that they have finite colimits, epi-mono factorization, mono classification, that they are LCCC , disjointness of coproduct maps, every equivalence relation is effective.

This talk is part of the Cargo series.

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