89

Questions

4
19
votes
3
answers
843
views

What do coherent topoi have to do with completeness?

may 17 at 4:03 StephenK1 1

9
16
votes
4
answers
1k
views

What is a simplicial commutative ring from the point of view of homotopy theory?

jan 11 at 21:42 André Henriques 15.2k23085

11
24
votes
2
answers
1k
views

Are spectra really the same as cohomology theories?

jan 1 at 7:37 Tom Goodwillie 27k262111

3
7
votes
1
answer
244
views

Smashing localizations in the category of spectra

nov 22 at 19:08 John Palmieri 1,8241715

4
6
votes
1
answer
310
views

Is a wedge of spheres an $E_\infty$ ring spectrum?

nov 2 at 5:04 Tyler Lawson 19k34793

1
2
votes
1
answer
244
views

$\mathbb{Z}/2$-action on spectra given by inversion

sep 29 at 19:58 Tyler Lawson 19k34793

7
14
votes
3
answers
1k
views

What do cohomology operations have to do with the non-existence of commutative cochains over $\mathbb{Z}$?

sep 21 at 12:26 Justin Young 16313

17
16
votes
1
answer
1k
views

Fundamental group of the moduli stack of elliptic curves

aug 24 at 21:19 quasi-coherent 50436

3
11
votes
2
answers
955
views

Acyclic models via model categories?

aug 11 at 18:02 Akhil Mathew 12.1k22989

2
5
votes
1
answer
279
views

What is the upper shriek in Grothendieck duality in the non-proper case?

aug 2 at 22:49 Jacob Bell 75517

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