138

Questions
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When singular points of a reduced scheme are not dense in it?

jun 1 10 at 20:31 Qing Liu 8,585●17●26

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Morphisms between pure complexes of sheaves

may 2 10 at 13:52 Geordie Williamson 1,237●4●10

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A silly question: is the number of points on a Jacobian (of a curve, over a finite field) known?

nov 11 10 at 11:36 Francesco Polizzi 18.8k●2●34●55

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Questions on standard (motivic) conjectures

jan 16 11 at 18:32 mephisto 166●1●3

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If $X,Y$ are regular and of finite type over $S$, can $X\times _S Y$ be embedded into a regular $S$-scheme?

feb 21 at 21:29 Mikhail Bondarko 5,876●1●4●21

 
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A canonical way to kill a subset of cohomology in a dg-algebra: via $A_\infty$-algebras? References?

jan 28 at 6:57 Mikhail Bondarko 5,876●1●4●21

 
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Should the etale cohomology of a smooth projective variety (over rationals) be semi-simple; why?

feb 27 at 15:16 Daniel Miller 2,311●8●23

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Which schemes can be presented as limits of smooth varieties?

mar 6 at 10:06 Mikhail Bondarko 5,876●1●4●21

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(Co)homological characterization of homotopy pullbacks

feb 28 12 at 23:45 John Klein 7,103●19●28

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The Gysin long exact sequence for the complement of the zero section of a line bundle over a (possibly) singular base

mar 6 12 at 4:08 Marc Hoyois 1,186●2●8

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