Similar to 可逆チューリングマシン

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

Courant–Friedrichs–Lewy condition

E (complexity)

ESPACE

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Einstein's constant

Anne's theorem

Egan conjecture