Locally unital ideals
109649
idempotents acting as local identities
62917
Associated Prime Ideals in a Noetherian Ring; Exercise 6.4 in Matsumura
45684
Is quotient of a ring by a power of a maximal ideal local?
112045
A property of minimal prime ideal
29126
Maximal ideal in the ring of continuous functions from $\mathbb{R} \to \mathbb{R}$
72350
Constructing Idempotent Generator of Idempotent Ideal
587
Ideal Generated by the Union of Two Ideals
47134
Ideals generated by two elements
11109
The ideal generated by a non-compact operator
139334
Determining the existence or non-existence of Non Trivial Ideals of $L(V)$
54916
Maximal ideal in commutative ring
142145
strictly positive elements in $C^*$-algebra
137450
Two-sided ideal generated by subset of not commutative ring
27167
Ideals in $F[x]$ and Euclidean domains are generated by any element of minimal degree
144572
Proof that ideals in $C[0,1]$ are of the form $M_c$ that should not involve Zorn's Lemma
18406
An ideal whose radical is maximal is primary
68786
"This property is local on" : properties of morphisms of $S$-schemes