Yosemite Sam

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Name	Yosemite Sam
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903

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can a common mortal understand why the affine line is not smooth in brave new algebraic geometry?

nov 17 11 at 17:29 Tyler Lawson 19k●3●47●93

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402

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coarse moduli space and $\pi_0$

algebraic-stacks ag.algebraic-geometry

may 4 12 at 7:47 Yosemite Sam 822●1●2●10

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642

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how to make the category of chain complexes into an $\infty$-category

homological-algebra infinity-categories stable-category chain-complexes

jun 20 at 15:56 Hiro Lee Tanaka 1,403●8●16

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answer

343

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what is the stringy Kähler moduli space?

ag.algebraic-geometry mp.mathematical-physics complex-geometry string-theory mirror-symmetry

may 16 12 at 23:06 Satoshi Nawata 584●2●6

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491

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Reference for the derived category of $X$, $[X/G]$ and $X/G$

ag.algebraic-geometry stacks

feb 16 12 at 0:45 Yosemite Sam 822●1●2●10

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889

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surjective morphism of schemes or epimorphism of sheaves?

ag.algebraic-geometry stacks algebraic-spaces sheaves ct.category-theory

dec 7 11 at 23:16 Yosemite Sam 822●1●2●10

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193

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where to learn K-group of coherent sheaves modulo numerical equivalence?

intersection-theory algebraic-k-theory ag.algebraic-geometry

jul 21 at 8:06 Yosemite Sam 822●1●2●10

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386

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If $f: X \to Y$ is a finite flat morphism of schemes, $g: Y \to Z$ is a proper morphism of relative dimension one, $Z$ is affine and $E$ is a vector bundle on $Y$ with $R^1g_E=0$ then $H^1(X,f^E)=0$?

ag.algebraic-geometry sheaf-cohomology

feb 10 12 at 5:18 Sándor Kovács 23.8k●2●53●73

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461

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Does Hom(X,Spec R) = Hom(R, O(X)) hold for algebraic stacks?

stacks ag.algebraic-geometry

oct 31 11 at 14:56 Mattia Talpo 343●2●6

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167

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Can I recognize the quotient of a group by a closed subgroup? (for example the standard representation of S3 in GL(2,C))

rt.representation-theory ag.algebraic-geometry algebraic-groups

aug 1 11 at 0:04 Yosemite Sam 822●1●2●10

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Reference request: an algebraic stack whose closed points have no automorphisms is an algebraic space

Reference request - CDGA vs. sAlg in char. 0

Cone of a morphism in an abelian category when considered as a morphism in derived category. Connection between 4-term exact sequences and distinguished triangles.

how to make the category of chain complexes into an $\infty$-category

surjective morphism of schemes or epimorphism of sheaves?

Reference for the derived category of $X$, $[X/G]$ and $X/G$

Lie Algebra of Group Scheme

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Questions

can a common mortal understand why the affine line is not smooth in brave new algebraic geometry?

coarse moduli space and $\pi_0$

how to make the category of chain complexes into an $\infty$-category

what is the stringy Kähler moduli space?

Reference for the derived category of $X$, $[X/G]$ and $X/G$

surjective morphism of schemes or epimorphism of sheaves?

where to learn K-group of coherent sheaves modulo numerical equivalence?

If $f: X \to Y$ is a finite flat morphism of schemes, $g: Y \to Z$ is a proper morphism of relative dimension one, $Z$ is affine and $E$ is a vector bundle on $Y$ with $R^1g_E=0$ then $H^1(X,f^E)=0$?

Does Hom(X,Spec R) = Hom(R, O(X)) hold for algebraic stacks?

Can I recognize the quotient of a group by a closed subgroup? (for example the standard representation of S3 in GL(2,C))

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