19

Questions
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502
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What are the benefits of viewing a sheaf from the “espace étalé” persepctive?

may 8 12 at 0:40 Simon Rose 2,046●5●13

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answer
494
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What relations exist among (quasi-) modular forms of different levels?

jun 5 11 at 23:45 paul garrett 6,704●17●26

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How do modular forms of half-integral weight relate to the (quasi-modular) Eisenstein series?

sep 9 10 at 17:08 Robin Chapman 14.5k●2●29●50

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8
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Why isn’t the orbifold cohomology of $pt/G$ equal to the cohomology of $BG$?

mar 3 11 at 1:20 David Ben-Zvi 12.6k●1●28●51

 
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286
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What is a good reference (preferably thorough) for the Derived Category of a scheme/orbifold/stack?

may 10 at 17:52 Jason Polak 597●4●15

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592
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What classes am I missing in the Picard lattice of a Kummer K3 surface?

feb 18 10 at 17:34 VA 8,240●22●44

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564
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What is the geometry behind psi classes in Gromov-Witten theory?

jul 20 10 at 18:16 ABayer 1,474●1●9●17

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3
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530
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Is there an intrinsic way to define the group law on Abelian varieties?

jan 14 11 at 7:48 Sebastian 1,536●5●8

 
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283
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How do the rings of level $N$ quasi-modular forms related to the rings of modular forms?

nov 3 11 at 16:06 Ram Murty 76●1

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387
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To what extent does Poincare duality hold on moduli stacks?

nov 24 11 at 16:14 Balazs 1,348●8●16

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