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May 14 at 21:04 history became hot network question
May 14 at 19:34 answer added Tim Campion timeline score: 5
May 14 at 19:29 vote accept JD1874
May 14 at 19:26 comment added Tim Campion @ConnorMalin Disjoint union doesn’t preserve colimits in each variable separately. For instance $X \amalg (-)$ doesn’t preserve the initial object.
May 14 at 18:10 answer added user509184 timeline score: 6
May 14 at 14:29 comment added Connor Malin Take the model structure on $\mathrm{Set}$ with weak equivalences given by isomorphisms and (co)fibrations anything. Then surely, disjoint union and cartesian product give an example?
May 14 at 13:38 history edited Martin Sleziak CC BY-SA 4.0
a typo in the title
May 14 at 13:33 comment added Dave Benson How about chain complexes of modules over an elementary abelian $p$-group, and over a $p$-restricted Lie algebra with zero bracket and zero restriction map, and of the same rank?
May 14 at 13:12 comment added David White Yes, I know an example. If you are in Glasgow and interested in this kind of thing, you should email me. I'll be in Glasgow in June and happy to get a cup of coffee with you. Also, if you email me, I'll be happy to share the example I know. Nice to know others are interested in this kind of thing!
S May 14 at 12:59 review First questions
May 14 at 13:36
S May 14 at 12:59 history asked JD1874 CC BY-SA 4.0