Question

Proving that a doubly stochastic matrix is a convex combination of permutation matrices

score 252 · Answer 1 · 2026-03-25 16:08:35

252

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Proving that a doubly stochastic matrix is a convex combination of permutation matrices

Published on 25 Mar 2026 - 16:08

score 102 · Answer 2 · 2026-03-27 01:44:56

102

Views

Maximal subgroup of permutations for which trace is invariant

Published on 27 Mar 2026 - 1:44

score 130 · Answer 3 · 2026-03-25 08:13:45

130

Views

$52$ cards are dealt among 4 players, determine the probability that a player gets all the spades

Published on 25 Mar 2026 - 8:13

score 265 · Answer 4 · 2026-03-26 09:36:53

265

Views

Hamming distance introduced by random permutation

Published on 26 Mar 2026 - 9:36

score 69 · Answer 5 · 2026-03-30 12:24:14

Find the number of way letters a,b,c,d,e that can be arranged in 10 places without repetition, as the letter should be in alphabetical order?

score 301 · Answer 6 · 2019-03-02 23:51:44

301

Views

Cycles and permutations

Published on 02 Mar 2019 - 23:51

score 1.6k · Answer 7 · 2026-03-26 09:37:11

1.6k

Views

Combination question on forming a committee

Published on 26 Mar 2026 - 9:37

score 659 · Answer 8 · 2026-04-06 00:19:12

659

Views

Order of a permutation in $S_n$

Published on 06 Apr 2026 - 0:19

score 171 · Answer 9 · 2019-03-03 09:50:03

171

Views

5 boys 3 girls in row a such that not all girls together. Two different approaches give different solutions.

Published on 03 Mar 2019 - 9:50

score 59 · Answer 10 · 2019-03-03 17:28:18

59

Views

Permutations restrictions

Published on 03 Mar 2019 - 17:28

score 1.6k · Answer 11 · 2026-03-25 11:02:28

1.6k

Views

Number of different cyclic permutations in a symmetric group

Published on 25 Mar 2026 - 11:02

score 32 · Answer 12 · 2019-03-04 15:01:26

32

Views

Doubt regarding the number of ways of selecting exactly $3$ of a kind from a deck of cards

Published on 04 Mar 2019 - 15:01

score 192 · Answer 13 · 2026-02-23 00:03:13

192

Views

Are standard bases for the exterior power essentially unique?

Published on 23 Feb 2026 - 0:03

score 130 · Answer 14 · 2026-03-26 14:21:06

130

Views

If $n\geq3$ and $G\leq S_n$ is 2-transitive, then $G\cap A_n$ is transitive.

Published on 26 Mar 2026 - 14:21

score 1.9k · Answer 15 · 2026-03-30 13:54:45

1.9k

Views

How many ways can you put $20$ cards in $12$ envelopes if the cards are (a)Distinct (b)identical (c)identical and no envelope is left empty

Published on 30 Mar 2026 - 13:54

List Question

Proving that a doubly stochastic matrix is a convex combination of permutation matrices

Maximal subgroup of permutations for which trace is invariant

$52$ cards are dealt among 4 players, determine the probability that a player gets all the spades

Hamming distance introduced by random permutation

Find the number of way letters a,b,c,d,e that can be arranged in 10 places without repetition, as the letter should be in alphabetical order?

Cycles and permutations

Combination question on forming a committee

Order of a permutation in $S_n$

5 boys 3 girls in row a such that not all girls together. Two different approaches give different solutions.

Permutations restrictions

Number of different cyclic permutations in a symmetric group

Doubt regarding the number of ways of selecting exactly $3$ of a kind from a deck of cards

Are standard bases for the exterior power essentially unique?

If $n\geq3$ and $G\leq S_n$ is 2-transitive, then $G\cap A_n$ is transitive.

How many ways can you put $20$ cards in $12$ envelopes if the cards are (a)Distinct (b)identical (c)identical and no envelope is left empty

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