Special theory of relativety
102908
Explaining to an 8-year-old why nothing can travel faster than light
129062
Distinguishing definitions from equivalences.
3663
Finding counterexamples in elementary set theory.
138298
Learning about Grothendieck's Galois Theory.
109649
idempotents acting as local identities
31392
Examples and Counterexamples of Relations which Satisfy Certain Properties
151676
Being characteristic is transitive
59446
Universal property of universal bundles.
37601
Catenatives followed by infinitives and gerunds
127596
Composition of equivalence relations
25553
elementary set theory (cartesian product and symmetric difference proof)
76443
Frequentism and priors
55257
Egoroff's theorem in Royden Fitzpatrick (comparison with lemma 10)
20004
Meta Theory when studying Set Theory
130388
relative homology is the reduced homology of the quotient
54497
Set Notation - Inclusion and Proper Inclusion
83187
Elegant alternatives to the weird multiple inheritance