New posts in permutations

"Distance" between two permutations?

Outer automorphisms of the infinite symmetric group

group-theory permutations axiom-of-choice

Non-trivial blocks of order $16$ of $D_{16}$ acting on $8$-gon vertices

group-theory permutations group-actions symmetric-groups dihedral-groups

How many permutations of a multiset have a run of length k?

combinatorics permutations recurrence-relations multisets combinatorics-on-words

Show that there is always a way to achieve det(A) > 0

linear-algebra permutations determinant trace

Can we count odd and even derangements nicely without taking a determinant?

combinatorics permutations

Subgroups of $S_4$ isomorphic to $S_3$ and $S_2$?

abstract-algebra group-theory permutations

$4$ letter words taken from the letters of CONCENTRATIONS

combinatorics permutations combinations

Proving $S_n$ is generated by the set $\{(1\text{ }2),(2\text{ }3),\cdots,(n-1\text{ }n)\}$ of $n-1$ transpositions.

abstract-algebra group-theory permutations

What is the number of automorphisms (including identity) for permutation group $S_3$ on 3 letters?

abstract-algebra group-theory finite-groups permutations

$G$ simple group and there exists a subgroup of index $n$. Show that: $|G|$ divides $n!/2$

abstract-algebra group-theory finite-groups permutations

Integer solution $(x,y,z)$ to $xyz=24$

How would I figure out how many anagrams of mississippi don't contain the word psi?

combinatorics statistics discrete-mathematics permutations

If $\epsilon = \beta_1 \beta_2 ...... \beta_r$ where the $\beta's$ are 2- cycles, then r is even.

abstract-algebra permutations

What are the number of ways of seating $n$ people around a circular table labelled from $1$ to n such that $3$ of them must be seated together?

combinatorics permutations

Applying Burnside's Lemma to a Permutational Problem.

combinatorics group-theory permutations finite-groups group-actions

How many positive integers less than 1,000,000 have the sum of their digits equal to 19?

combinatorics permutations combinations

To prove: $n!=\sum\limits_{r=0}^n (-1)^r \binom{n}{r} (n-r)^n$ [duplicate]

linear-algebra abstract-algebra combinatorics permutations

Cyclic permutation of factors preserves order of elements

abstract-algebra permutations order-theory cyclic-groups

Is there any algorithm to find Isomorphism function between two graphs?

graph-theory permutations graph-isomorphism