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8

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1

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186

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Formula for number of permutations less than a given permutation in weak order

co.combinatorics permutations bruhat-order

Mar 13 at 17:02 Hugh Denoncourt 376

4

votes

0

answers

204

views

Two types of criticality

graph-theory graph-colorings graph-minors hadwiger-conjecture

Jan 5 '18 at 16:15 Dominic van der Zypen 31.1k

5

votes

1

answer

265

views

A new polygon forcing theorem

discrete-geometry

Oct 23 '17 at 10:07 Community♦ 1

3

votes

0

answers

128

views

Number of maximal chains in Bruhat order

co.combinatorics

Oct 21 '14 at 8:21 Alicia Mendes 31

11

votes

2

answers

477

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Principal Order Ideals in the Weak Bruhat Order

co.combinatorics permutations posets enumerative-combinatorics bruhat-order

Dec 7 '15 at 0:43 darij grinberg 26.8k

75

votes

4

answers

9k

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Can a group be a universal Turing machine?

gr.group-theory computability-theory

Nov 22 at 8:45 Ville Salo 1,008

15

votes

0

answers

500

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Comparing the Kazhdan-Lusztig and Steinberg pre-orders

rt.representation-theory ag.algebraic-geometry schubert-cells canonical-bases open-problems

Nov 11 '11 at 16:10 Ben Webster♦ 37.7k

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