Inverse



GRE Barron 考研

解释

GRE 红宝书

• adj. 相反的; 倒转的
• ［英］ adj. 相反的 ( directly opposite) ; 倒转的 ( inverted)
• ［记］ in ( 反) +verse ( 转) -> 反转 -> 相反的

Webster Collegiate

I. adjective

• Etymology: Middle English, turned upside down, from Latin inversus, from past participle of invertere
• Date: 15th century
• 1. opposite in order, nature, or effect
• 2. being an inverse function <inverse sine>

II. noun

• Date: circa 1681
• 1. something of a contrary nature or quality ; opposite, reverse
• 2. a proposition or theorem formed by contradicting both the subject and predicate or both the hypothesis and conclusion of a given proposition or theorem <the inverse of “if A then B” is “if not-A then not-B”> — compare contrapositive
• 3.
  • a. inverse function; also an operation (as subtraction) that undoes the effect of another operation
  • b. a set element that is related to another element in such a way that the result of applying a given binary operation to them is an identity element of the set

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