Similar to 正弦定理

Kőnig's lemma

Primitive Pythagorean triple

Cauchy's mean value theorem

Mean value theorem (divided differences)

Schiffler point

Shannon's source coding theorem

Noisy-channel coding theorem

Jordan's lemma

Sylvester–Gallai theorem

Analyticity of holomorphic functions

Linear independence

Diagonal lemma

Thales's theorem

Monotone convergence theorem

Intermediate value theorem

Parallelogram law

Taylor's theorem

Dirichlet integral

Thébault's theorem

De Moivre's formula

Ptolemy's theorem

Sz.-Nagy's dilation theorem

Seven circles theorem

Napkin ring problem

Lazy caterer's sequence

Proof that e is irrational

Hardy–Littlewood inequality

Pappus's hexagon theorem