Similar to 分裂補題

Fodor's lemma

Pumping lemma for context-free languages

Bézout's identity

Mostowski collapse lemma

Yoneda lemma

Rasiowa–Sikorski lemma

Riesz's lemma

Riemann–Lebesgue lemma

Lebesgue's number lemma

Weyl's lemma (Laplace equation)

Mathematics

0.999...

Zero-dimensional space

Zero to the power of zero

One-dimensional space

1 + 1 + 1 + 1 + ⋯

1 + 2 + 3 + 4 + ⋯

1 + 2 + 4 + 8 + ⋯

Root of unity

Ones' complement

1 − 1 + 2 − 6 + 24 − 120 + ⋯

1 − 2 + 3 − 4 + ⋯

1 − 2 + 4 − 8 + ⋯

1/2 + 1/4 + 1/8 + 1/16 + ⋯

1/2 − 1/4 + 1/8 − 1/16 + ⋯

1/4 + 1/16 + 1/64 + 1/256 + ⋯