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Kevin P. Costello

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6 Questions

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17

31

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5k

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Why is the Derangement Probability so Close to $\frac{1}{e}$?

combinatorics intuition inclusion-exclusion derangements

Nov 17 at 19:16 MCCCS 1,395

2

9

votes

1

answer

104

views

When is the Subgroup Lattice Graded?

combinatorics group-theory finite-groups order-theory lattice-orders

Apr 5 '19 at 1:16 Kevin P. Costello 5,896

2

8

votes

1

answer

236

views

Avoiding exactly one permutation pattern

combinatorics reference-request permutations pattern-matching

Aug 27 '18 at 11:47 bof 64.4k

1

6

votes

1

answer

159

views

Probability of unique winner in a coin flipping game (limit of a recursive sequence)

real-analysis probability recurrence-relations

Aug 9 '19 at 1:50 btilly 1,148

2

6

votes

3

answers

163

views

Distribution of maximum proportion of heads in an infinite sequence of flips

probability-theory probability-distributions reference-request

May 26 '18 at 12:59 mercio 47.3k

3

2

votes

1

answer

213

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What is the mod-$3$ analogue of the solution to the Eventown problem?

linear-algebra combinatorics reference-request extremal-combinatorics

Feb 8 '17 at 20:42 Kevin P. Costello 5,896

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