Conmutativity and Asociativity
18817
Does commutativity imply Associativity?
62936
Proving equivalencies of two versions of the Axiom of Choice
146231
Let X be a set with an associative binary operation ◦ with identity e. Suppose every element of X satisﬁes x ◦ x = e. Prove that ◦ is commutative.
97254
What is the proof of permutations of similar objects?
144211
a second course in abstract algebra
38691
Injectivity of Homomorphism in Localization
153721
Conjugating a permutation
89234
Any Set with Associativity, Left Identity, Left Inverse is a Group
126331
Associative ring with identity, inverses, divisors of zero and Artinianity
89264
Connectedness in the Quotient Space
60223
Two principal ideals coincide if and only if their generators are associated
39550
Intuition behind conjugation in group theory
44361
An automorphism that has no fixed points except for the identity and is its own inverse implies commutativity
102899
Category theory with objects as logical expressions over $\{\vee,\wedge,\neg\}$ and morphisms as?
43503
Bases of complex vector spaces and the axiom of choice
66134
Sufficiently many idempotents and commutativity
2162
How does one actually show from associativity that one can drop parentheses?