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# Questions

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28
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### Which colimits commute with which limits in the category of sets?

sep 10 at 12:55 Marie Bjerrum 8111

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17
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328
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### Is there a (discrete) monoid M injecting into its group completion G for which BM is not homotopy equivalent to BG?

feb 18 at 22:22 Omar Antolín-Camarena 1,507716

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13
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5
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### In what sense are fields an algebraic theory?

may 27 10 at 20:14 Buschi Sergio 1,809148

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11
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360
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### What are some examples of weak ω-categories?

apr 30 at 13:33 Omar Antolín-Camarena 1,507716

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7
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775
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### Is there a description of sheaf cohomology in algebraic-topological terms?

aug 11 at 13:21 Akhil Mathew 12.1k22989