Can you always define the sum of ideals?
96787
Why is the arbitrary sum, but not the arbitrary intersection, of ideals an ideal?
157876
If every prime ideal is maximal, what can we say about the ring?
21606
Can all real numbers be represented by the sum of a convergent series?
10943
What is an example of a radical of sum of ideals not being equal to the sum of radicals?
152754
When is the sum of divisors a perfect square?
89056
Intuitive understanding of ideal $I = (x+1,x^2+1)$ and the quotient $\Bbb Z[x]/I$
155745
Ideals of $\mathbb{Z}[X]$
91350
Wedge sum of circles and the Infinite Earring
27167
Ideals in $F[x]$ and Euclidean domains are generated by any element of minimal degree
31585
Primary ideals of $\mathbb{Z}$
81296
If A and B are ideals of a ring, show that A + B = $\{a+b|a \in A, b \in B\}$ is an ideal
74796
Extension of intersection of ideals
111824
Sum of nilpotent and element is a unit in ring?
43459
Sum over all non-evil numbers
17375
When is the limit of a sum equal to the sum of limits?
3327
Height and minimal number of generators of an ideal
74537
Maximal Ideals in $K[y]$