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[数列] 任两项不整除 差分序列无界

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hbghlyj posted 2023-11-7 08:06 |Read mode
Invariants Summer 2022 Week 2 Problem 2.
自然数递增序列$c_1, c_2, \cdots$满足对于任何$i \neq j$,$c_i$不整除$c_j$。证明:差分序列
$$
c_2-c_1, c_3-c_2, c_4-c_3 \cdots
$$
是无界的。

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