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# Questions

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### A map inducing isomorphisms on homology but not on homotopy

aug 13 at 1:01 rhlewis 1036

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4
613
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### Nontrivial examples of non-trivial principal circle bundles

aug 19 at 16:53 Ryan Budney 21.6k140101

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509
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### On the difference between a projective chain complex and a level-wise projective chain complex

aug 1 at 12:52 Ralph 12.5k1036

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364
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### Cross sections in bundles and principal G-bundles

jun 27 at 13:03 Oldřich Spáčil 15515

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191
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### Small model categories?

oct 3 at 21:50 Shlomi A 28115

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186
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### Small categories and completeness

oct 3 at 20:38 Wouter Stekelenburg 5046

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4
180
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### A homotopy equivalence between total spaces in a (Hurewicz) fibration which is not a fiber homotopy equivalence

aug 11 at 13:07 jim stasheff 1,386210

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0
176
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### Induced model structure?

oct 5 at 10:51 Shlomi A 28115

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