A semigroup with three or four elements without identity
29538
Does a non-abelian semigroup without identity exist?
156383
Proving a combinatorial identity without double counting
74924
identity element of $(D_n ,\gcd)$
24561
$\mathbb S_n$ as semidirect product
158426
Proving lemma about centrality of idempotent elements in a Ring with no nilpotent elements.
85379
Semigroup analogue to the classification of finite simple groups?
88718
A group is generated by two elements of order $2$ is infinite and non-abelian
67926
$S_n$ is generated by elements of the form $(1k)$
102971
Product of all elements of a finite group with an unique element of order 2
90506
Finite multiplicative group of matrices with sum of traces equal to zero.
39724
Combinatorial Identities
121765
Semigroups and solutions of equation
16476
Order of the product of two commuting elements with coprime orders in a group.
120344
Are there nontrivial vector spaces with finitely many elements?
109470
Proof of whether a specific element is in a commutative, invertible monoid.
5089
An element of a group has the same order as its inverse
142038
Finding the number of elements of order two in the symmetric group $S_4$