| 单词 | composition |
| 释义 | composition n = n1 + n2 + … + nk, where n1, n2,…, nk are positive integers, and the order in which n1, n2,…, nk matters. The number of compositions of n equals 2n–1. For example the compositions of 4 are 4 = 3 + 1 = 1 + 3 = 2 + 2 = 2 + 1 + 1 = 1 + 2 + 1 = 1 + 1 + 2 = 1 + 1 + 1 + 1. See partition. |
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