Cutting A Torus
A standard torus (specifically, a ring torus) can be cut with n planes into at most
parts.
The initial terms of this sequence for n starting from 1 are:
- 2, 6, 13, 24, 40, … (sequence A003600 in OEIS).
Read more about this topic: Torus
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—Henry David Thoreau (1817–1862)
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—Alvah Bessie, Ranald MacDougall, and Lester Cole. Raoul Walsh. Nameless GI, Objective Burma, cutting dog tags off a dead GI (1945)