28

Questions
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39
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Counterexamples in Algebra?

aug 8 11 at 17:49 Chandrasekhar 2,060●1●11●28

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15
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When and how is it appropriate for an undergraduate to email a professor out of the blue?

aug 31 11 at 17:19 Gil Kalai 11.1k●6●81●146

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10
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Spectral sequences: opening the black box slowly with an example

dec 15 10 at 10:14 Matthias Künzer 503●4●7

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“Slap your forehead” moments- Greatest Hits [closed]

jul 17 10 at 11:07 Mark Schwarzmann 2,192●1●14●27

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Prime ideals in the ring of germs of continuous functions

nov 30 11 at 13:18 Georges Elencwajg 24.6k●66●132

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Is the dual notion of a presheaf useful?

jul 18 10 at 13:19 G. Rodrigues 1,015●4●8

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Cobordism categories that don’t involve manifolds

mar 29 11 at 15:19 Todd Trimble 22.7k●1●64●97

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3
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A toy example of a tensor triangulated category?

apr 19 11 at 5:27 Mikhail Bondarko 5,926●1●4●21

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3
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Proof that the homotopy category of a stable $\infty$-category is triangulated

feb 14 11 at 17:37 Harry Gindi 8,948●2●33●97

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When do chain complexes decompose as a direct sum?

jul 23 10 at 19:08 Dylan Wilson 4,056●2●14●37

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