Reid Barton

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Name	Reid Barton
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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 857●3●11

24

51

votes

3

answers

2k

views

Does linearization of categories reflect isomorphism?

ct.category-theory rt.representation-theory linear-algebra open-problem

feb 12 12 at 3:26 Winfried 141●1●2

23

49

votes

0

answers

3k

views

Dropping three bodies

differential-equations ca.analysis-and-odes mp.mathematical-physics ds.dynamical-systems classical-mechanics

mar 4 at 21:41 patternguy 1

38

43

votes

7

answers

4k

views

Homotopy groups of Lie groups

at.algebraic-topology lie-groups

apr 12 11 at 20:03 Enrique Macias 81●2

28

38

votes

6

answers

2k

views

What are surprising examples of Model Categories?

model-categories homotopy-theory kt.k-theory-homology

mar 12 12 at 22:50 David White 4,860●1●20●27

17

37

votes

2

answers

1k

views

Collapsible group words

gr.group-theory co.combinatorics

jul 11 11 at 19:18 Sam Nead 5,302●12●26

25

36

votes

1

answer

3k

views

Lawvere’s “Some thoughts on the future of category theory.”

ct.category-theory math-philosophy

apr 30 11 at 10:56 Urs Schreiber 6,468●13●21

20

29

votes

4

answers

2k

views

Chain homotopy: Why du+ud and not du+vd?

at.algebraic-topology homological-algebra

apr 12 10 at 11:43 darij grinberg 12.6k●1●24●75

11

28

votes

2

answers

1k

views

What is the oriented Fano plane?

discrete-geometry co.combinatorics

apr 9 10 at 9:16 Mariano Suárez-Alvarez 30.6k●7●68●153

5

26

votes

1

answer

683

views

Is there a combinatorial reason that the (-1)st Catalan number is -1/2?

co.combinatorics catalan-numbers

feb 19 10 at 3:39 Jacques Carette 6,717●1●14●35

19

25

votes

5

answers

1k

views

Clifford algebra as an adjunction?

ct.category-theory clifford-algebras

jul 3 at 5:34 Joe Hannon 332●1●8

13

24

votes

3

answers

1k

views

For which spaces is homology (or cohomology) determined by the Eilenberg-Steenrod axioms

homotopy-theory homology shape-theory

oct 29 09 at 17:09 Reid Barton 14.4k●1●28●85

13

24

votes

2

answers

1k

views

Are there pairs of highly connected finite CW-complexes with the same homotopy groups?

at.algebraic-topology homotopy-theory examples

apr 8 at 6:48 Ricardo Andrade 2,392●1●9●18

11

24

votes

5

answers

2k

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Is the ultraproduct concept fundamentally category-theoretic?

ct.category-theory lo.logic model-theory set-theory

jul 6 10 at 16:50 Peter Arndt 6,888●18●42

10

21

votes

8

answers

2k

views

Points and lines in the plane

co.combinatorics discrete-geometry

nov 10 10 at 8:54 Andrey Rekalo 13.9k●1●32●68