Question

Recurrence relation and permutations

score 326 · Answer 1 · 2026-04-12 13:27:13

326

Views

Recurrence relation and permutations

Published on 12 Apr 2026 - 13:27

score 96 · Answer 2 · 2026-04-20 12:57:49

96

Views

If $\alpha, \beta$ are cycles s.t $\alpha^k(i)=\beta^k(i)$ then $\alpha=\beta$

Published on 20 Apr 2026 - 12:57

score 35 · Answer 3 · 2026-04-17 06:06:39

35

Views

Number of different factors

Published on 17 Apr 2026 - 6:06

score 90 · Answer 4 · 2026-04-13 04:53:03

90

Views

Sum of Binomial Coefficient with N changing exponentially and Fixed K

Published on 13 Apr 2026 - 4:53

score 39 · Answer 5 · 2026-03-26 04:53:46

39

Views

$G = S_7$, $a=(2,5,7)$, $b=(5,7)(4,3,1,6)$, $H = \langle a, b \rangle$, and let $K=\langle b \rangle$. Is K normal in H?

Published on 26 Mar 2026 - 4:53

score 72 · Answer 6 · 2026-04-15 08:10:26

72

Views

Number of Permutations for a given method

Published on 15 Apr 2026 - 8:10

score 281 · Answer 7 · 2026-04-14 04:44:00

281

Views

Can't figure out intersections between two binary numbers for a certain hamming distance

Published on 14 Apr 2026 - 4:44

score 163 · Answer 8 · 2026-03-25 13:56:59

163

Views

Number of permutations of $\{1,2,\dots,n\}$ so that there are no $i<j<k$ with $\pi(j)<\pi(i)<\pi(k)$.

Published on 25 Mar 2026 - 13:56

score 223 · Answer 9 · 2026-04-13 08:15:39

223

Views

Using combinatorics to form words of some letters.

Published on 13 Apr 2026 - 8:15

score 425 · Answer 10 · 2026-04-11 21:16:50

425

Views

How to line up 6 men and 4 women so that only 2 women are standing next to each other

Published on 11 Apr 2026 - 21:16

score 1k · Answer 11 · 2026-04-06 04:34:24

1k

Views

Maximal subgroup of $S_n$

Published on 06 Apr 2026 - 4:34

score 405 · Answer 12 · 2026-04-15 10:29:35

405

Views

True/False: A permutation of order 2 in $S_n$ must be odd.

Published on 15 Apr 2026 - 10:29

score 440 · Answer 13 · 2026-04-15 23:24:11

440

Views

If the 11 letters A-K denote the arbitrary permutations of the integers (1,2,3,.....11)

Published on 15 Apr 2026 - 23:24

score 467 · Answer 14 · 2026-04-15 20:36:54

467

Views

Length of permutation, metric

Published on 15 Apr 2026 - 20:36

score 221 · Answer 15 · 2026-04-15 04:53:36

221

Views

Letters and envelopes: what is the probability that exactly $2$ letters will be placed in the correct envelopes

Published on 15 Apr 2026 - 4:53

List Question

Recurrence relation and permutations

If $\alpha, \beta$ are cycles s.t $\alpha^k(i)=\beta^k(i)$ then $\alpha=\beta$

Number of different factors

Sum of Binomial Coefficient with N changing exponentially and Fixed K

$G = S_7$, $a=(2,5,7)$, $b=(5,7)(4,3,1,6)$, $H = \langle a, b \rangle$, and let $K=\langle b \rangle$. Is K normal in H?

Number of Permutations for a given method

Can't figure out intersections between two binary numbers for a certain hamming distance

Number of permutations of $\{1,2,\dots,n\}$ so that there are no $i<j<k$ with $\pi(j)<\pi(i)<\pi(k)$.

Using combinatorics to form words of some letters.

How to line up 6 men and 4 women so that only 2 women are standing next to each other

Maximal subgroup of $S_n$

True/False: A permutation of order 2 in $S_n$ must be odd.

If the 11 letters A-K denote the arbitrary permutations of the integers (1,2,3,.....11)

Length of permutation, metric

Letters and envelopes: what is the probability that exactly $2$ letters will be placed in the correct envelopes

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