subfactorial

名词 n.
中文释义

英文释义

名词 n.
  1. The result of deranging a number. In equations, it is usually symbolised by an exclamation mark (!) before the number being deranged (as opposed to factorials, where the exclamation mark occurs after the number).

词形变化

subfactorials plural

词源

From sub- + factorial.
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