Sum of nil left ideals
134622
Sum of nil right ideals
100720
Negative quotients and their remainders
95031
Find generators of the ideal of an algebraic set
15686
Product of a Lie ideal with a subalgebra
146347
An imo shortlist algebra question
47134
Ideals generated by two elements
118513
Ideal of product of affine varieties
83483
Is there a nice way to classify the ideals of the ring of lower triangular matrices?
50445
Explaining the product of two ideals
15904
Prime ideal and nilpotent elements
133706
If R is a local ring, then its maximal left-ideal is a left and right ideal
1425
The Chinese Remainder Theorem for Rings.
61383
How do I see that every left ideal of a square matrix ring over a field is principal?
118532
Nilradical of polynomial ring
82788
Direct summand of a free module
68167
Intersection of powers of an ideal in a Noetherian ring
74058
Sums and products of algebraic numbers