Nikita Kalinin

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Name	Nikita Kalinin
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Why are differential forms called closed and exact?

dg.differential-geometry differential-equations ho.history-overview

aug 17 11 at 12:57 zroslav 737●2●12

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prime ideals in C([0,1])

fa.functional-analysis

nov 13 10 at 15:43 Nate Eldredge 5,814●24●48

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558

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$\pi_4$ of simply-connected 4-manifold

at.algebraic-topology gt.geometric-topology

sep 1 10 at 2:28 Ian Agol 24.3k●1●34●86

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Polynomial contact structures on $RP^3$

dg.differential-geometry contact-manifolds ag.algebraic-geometry

nov 14 at 18:03 Nikita Kalinin 1,368●4●17

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370

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Can any numerical polynomial be a Hilbert polynomial of something?

ag.algebraic-geometry polynomials

mar 26 12 at 15:00 David Speyer 56.3k●3●103●242

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623

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Quadratic reciprocity and Weil reciprocity theorem

ag.algebraic-geometry algebraic-curves finite-fields nt.number-theory

jun 7 12 at 19:59 David Speyer 56.3k●3●103●242

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271

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Sum of two tangent bundles of $S^{2n}$

differential-topology at.algebraic-topology characteristic-classes

mar 26 at 22:26 Chris Gerig 5,656●1●12●40

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859

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Organizing principles of mathematics

soft-question

dec 23 10 at 5:22 MathOverflow♦ 1●2●3

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949

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Slice knots and exotic $\mathbb R^4$

dg.differential-geometry smooth-manifolds smoothness knot-theory four-manifolds

mar 9 11 at 8:29 Kelly Davis 1,113●1●7●16

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Uncountable preimage of every point

ca.analysis-and-odes gn.general-topology gt.geometric-topology

feb 8 11 at 1:45 Salcio 11●1

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Questions

Why are differential forms called closed and exact?

prime ideals in C([0,1])

$\pi_4$ of simply-connected 4-manifold

Polynomial contact structures on $RP^3$

Can any numerical polynomial be a Hilbert polynomial of something?

Quadratic reciprocity and Weil reciprocity theorem

Sum of two tangent bundles of $S^{2n}$

Organizing principles of mathematics

Slice knots and exotic $\mathbb R^4$

Uncountable preimage of every point

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