Similar to オイラーの公式

Interesting number paradox

Rank–nullity theorem

Gauss's lemma (number theory)

Angle bisector theorem

Leibniz formula for determinants

Locally connected space

Coupon collector's problem

Casey's theorem

Kőnig's lemma

Tree of primitive Pythagorean triples

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