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发帖数: 2632 | 1 ☆─────────────────────────────────────☆
cannotforget (Shannon) 于 (Thu May 27 17:23:24 2004) 提到:
Hey Guys. Help me check the following proof.
Suppose that claim is incorrect. That is, there exists a curve, denoted by
S_0, on which you can find such parallel segment of length 1/n. (assumption *
)
There must be a highest point, say H0, and a lowest point, say L0, on the
curve. Without loss of generality, assume that if we trace the curve from A to
B, we will meet H0 first.
Shift S0 to the rig |
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