Similar to オイラーの公式

Coupon collector's problem

Casey's theorem

Kőnig's lemma

Primitive Pythagorean triple

Mean value theorem (divided differences)

Shannon's source coding theorem

Noisy-channel coding theorem

Law of sines

Law of tangents

Linear independence

Diagonal lemma

Monotone convergence theorem

Intermediate value theorem

Parallelogram law

Taylor's theorem

Dirichlet integral

Thébault's theorem

Ptolemy's theorem

Sz.-Nagy's dilation theorem

Seven circles theorem

Napkin ring problem

Lazy caterer's sequence

Newton's theorem (quadrilateral)

Hardy–Littlewood inequality

Pappus's area theorem

Pappus's hexagon theorem

Banach–Alaoglu theorem

Banach fixed-point theorem