Similar to 二重再帰法

Ackermann function

Smn theorem

Slow-growing hierarchy

Low basis theorem

QR decomposition

Alpha shape

Successor function

Arity

1 + 1 + 1 + 1 + ⋯

1/2 + 1/4 + 1/8 + 1/16 + ⋯

1/2 − 1/4 + 1/8 − 1/16 + ⋯

1/4 + 1/16 + 1/64 + 1/256 + ⋯

Hundredth

0

1

2

3

4

5

6

7

8

9

Computability theory

Elementary recursive function

Analytical hierarchy