About idempotent element
158426
Proving lemma about centrality of idempotent elements in a Ring with no nilpotent elements.
141313
Inline elements denoted by {{}}? Cartesian product of these inline elements?
126771
Group element not taken to its inverse by any automorphism
133019
Nilpotent elements in $\mathbb Z_n$
52354
Given a idempotent endomorphism, show that $M = \ker(f) \oplus \ker (f-\text{id}_M)$
114662
Construction of a specific non-commutative and infinite group (with conditions on the order of the elements)
86154
Why is this true? A set is Dedekind infinite if and only if equipotent to the union with the set containing itself
16255
If $\mathop{\mathrm{Spec}}A$ is not connected then there is a nontrivial idempotent
119684
Is a contraction idempotent operator self-adjoint?
47313
What is $i^i$ and $(i^i)^i$
16147
Generic Element of Compositum of Two Fields
82315
is an empty set an element of {empty set}
60674
Finitely generated idempotent ideals are principal: proof without using Nakayama's lemma
31049
If $p$ is an irreducible element of an integral domain $D$, and if $e$ belongs to $D^\ast$ prove that $ep$ is also ireducible
6369
Is there a spec that the id of elements should be made global variable?
98734
Order of a product of elements in a generic group
138670
If product of finite elements in a ring is a unit then can we say each element as unit