Rudin's PMA Exercise 2.18 - Perfect Sets
12701
Perfect set without rationals
65764
Partitioning $\{1,2,\ldots,k\}$ into $p$ subsets with equal sums, where $p$ is prime
151681
arbitrarily long sequences without perfect powers
45792
Rigorous proof that surjectivity implies injectivity for finite sets
156850
Fix-Point Theorem Proof.
33117
Cyclic containment of sets
51687
Is the set $ \ (\mathbb{Z}_p \setminus \mathbb{Z}) \cap \mathbb{Q}$ non-empty?
124060
Are these subsets of the powerset P(N) countable?
7112
Product of sets and supremum
41726
Musical and combinatorial proof
25834
Proof a set cannot contain its own powerset - Russell's Paradox
135112
Outer measure of product of sets
61526
An exercise about nilpotent quotient groups
99217
Hartshorne's Exercise II.4.5(c). A third time.
130771
Sets and the principle of inclusion and exclusion
99715
Proper ideal and units proof
91180
Show $R \setminus S$ is a union of prime ideals