Jon Yard

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Name	Jon Yard
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Location	Los Alamos National Laboratory
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Video lectures of mathematics courses available online for free

ho.history-overview mathematics-education soft-question big-list

mar 8 at 12:25 Nikita Kalinin 1,398●4●17

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102

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36

answers

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Why is a topology made up of ‘open’ sets? [closed]

mathematics-education

jan 21 at 20:07 Marcos Cossarini 713●6●8

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6

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Is there an underlying explanation for the magical powers of the Schwarzian derivative?

dg.differential-geometry ds.dynamical-systems projective-geometry schwarzian-derivative

dec 9 at 20:34 Peter Michor 5,362●10●17

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44

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4

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Etale cohomology — Why study it?

etale-cohomology nt.number-theory ag.algebraic-geometry at.algebraic-topology

mar 7 at 22:24 Daniel Miller 2,311●8●23

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10

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6k

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“Philosophical” meaning of the Yoneda Lemma

ct.category-theory intuition

feb 25 at 13:07 Tom Leinster 13.5k●1●40●82

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18

answers

10k

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How should one present curl and divergence in an undergraduate multivariable calculus class?

mathematics-education dg.differential-geometry

jan 22 at 2:32 Scott Taylor 109●3

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33

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9

answers

6k

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Intuition for Group Cohomology

group-cohomology class-field-theory intuition

jan 6 at 5:54 David Corwin 6,730●23●56

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6

answers

2k

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Why do Littlewood-Richardson coefficients describe the cohomology of the Grassmannian?

ag.algebraic-geometry co.combinatorics intuition

dec 13 at 3:52 Dima Pasechnik 3,080●3●14

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10

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The finite subgroups of SL(2,C)

rt.representation-theory gr.group-theory finite-groups reference-request

jul 27 10 at 12:26 David 11●1

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7

answers

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Complete discrete valuation rings with residue field ℤ/p

nt.number-theory

jan 3 10 at 10:22 Chandan Singh Dalawat 11.4k●1●39●73

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votes

10

answers

3k

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Why are functional equations important?

modular-forms zeta-functions nt.number-theory

jan 19 10 at 15:58 Emerton 38.9k●4●120●198

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votes

6

answers

3k

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How is representation theory used in modular/automorphic forms?

modular-forms automorphic-forms rt.representation-theory reference-request intuition

nov 12 10 at 6:30 Marc Palm 6,946●7●20

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5

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tips on cohomology for number theory

homological-algebra class-field-theory intuition

jan 29 10 at 23:28 Cam McLeman 5,780●1●22●41

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“Points” in algebraic geometry: Why shift from m-Spec to Spec?

ag.algebraic-geometry

dec 16 10 at 20:59 Marc Nieper-Wißkirchen 1,313●5●15

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5

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Definitions of Hecke algebras

rt.representation-theory hecke-algebras coxeter-groups weyl-group

oct 4 10 at 11:16 Johannes Hahn 1,725●6●12