Sam Derbyshire

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Name	Sam Derbyshire
Member for	3 years
Seen	yesterday
Website
Location	King's College London, United Kingdom
Age	23

Cohomology enthusiast.

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147

157

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21

answers

16k

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Thinking and Explaining

big-picture soft-question

jun 7 at 20:44 Gil Kalai 10.7k●6●80●144

64

86

votes

6

answers

6k

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Proofs of Bott periodicity

at.algebraic-topology kt.k-theory-homology homotopy-theory

jun 8 at 2:00 Robert Bruner 837●3●11

86

76

votes

56

answers

14k

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Your favorite surprising connections in Mathematics

big-list big-picture

dec 31 at 0:26 David Corwin 6,730●23●56

55

57

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8

answers

3k

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Why are flat morphisms “flat?”

ag.algebraic-geometry intuition soft-question

oct 4 10 at 5:49 Sándor Kovács 23.7k●2●52●73

51

54

votes

8

answers

6k

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What do heat kernels have to do with the Riemann-Roch theorem and the Gauss-Bonnet theorem?

dg.differential-geometry manifolds ap.analysis-of-pdes ag.algebraic-geometry

mar 23 at 7:02 chairman mao 1

35

52

votes

7

answers

4k

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What is the field with one element?

ag.algebraic-geometry motives zeta-functions f-1

jan 6 10 at 10:07 Ilya Nikokoshev 8,989●5●30●73

24

50

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7

answers

3k

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Open project: Let’s compute the Fourier expansion of a non-solvable algebraic Maass form.

nt.number-theory computational-number-theo langlands-conjectures

jun 14 at 6:00 Chandan Singh Dalawat 11.5k●1●39●73

62

49

votes

10

answers

7k

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Motivation for algebraic K-theory?

at.algebraic-topology algebraic-k-theory motivation kt.k-theory-homology

jun 14 11 at 14:25 Anil P 33●6

34

46

votes

6

answers

3k

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Is there an analogue of curvature in algebraic geometry?

dg.differential-geometry mg.metric-geometry ag.algebraic-geometry

jan 7 11 at 4:11 David Ben-Zvi 12.6k●1●28●50

40

46

votes

6

answers

6k

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How to find ICM talks?

ho.history-overview reference-request big-picture

apr 14 at 10:21 Tittu 1

56

45

votes

22

answers

9k

views

What’s the “best” proof of quadratic reciprocity?

nt.number-theory quadratic-reciprocity

apr 20 at 22:10 ACL 4,235●12●24

29

45

votes

8

answers

3k

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equivalence of Grothendieck-style versus Cech-style sheaf cohomology

sheaf-theory cohomology ag.algebraic-geometry

mar 15 11 at 7:00 Anton Geraschenko♦♦ 13.7k●3●48●108

51

43

votes

3

answers

4k

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Intuitive explanation for the Atiyah-Singer index theorem

kt.k-theory-homology vector-bundles characteristic-classes

may 13 10 at 5:46 Dev Sinha 2,470●10●20

49

43

votes

10

answers

5k

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Is Fourier analysis a special case of representation theory or an analogue?

rt.representation-theory fourier-analysis

dec 6 at 0:36 Steve Huntsman 8,139●1●22●56

21

42

votes

1

answer

3k

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The mathematical theory of Feynman integrals

fa.functional-analysis mp.mathematical-physics pr.probability gt.geometric-topology feynman-integral

may 16 10 at 16:01 Clay Cordova 1,049●6●10