V2EX inductive hypothesis

Inductive Hypothesis

Definition / 定义

inductive hypothesis(归纳假设):在数学归纳法证明中,先假定命题对某个特定整数(通常记为 k)成立,用这个假设去推出命题对下一个整数(k+1)也成立。它是“归纳步骤”的核心前提。(在其他领域也可指“用于归纳推理的假设”,但最常见的是数学归纳法语境。)

Pronunciation / 发音(IPA)

/ndktv hapθss/

Examples / 例句

Assume the statement holds for k; this is the inductive hypothesis.
假设该命题对 k 成立;这就是归纳假设。

Using the inductive hypothesis, we show that if the formula is true for n = k, then it must also be true for n = k + 1.
利用归纳假设,我们证明:如果该公式在 n = k 时为真,那么在 n = k + 1 时也必然为真。

Etymology / 词源

inductive 来自拉丁语 inducere(“引入、导致”),在逻辑与数学中指“从个别推到一般”的归纳hypothesis 来自希腊语 hypothesis(“假设、前提”)。合起来表示“用于归纳证明步骤中的假设前提”,尤其指数学归纳法里对 k 的那一步假定。/p>

Related Words / 相关词汇

Literary Works / 文献与作品中的用例

  • How to Prove It: A Structured Approach(Daniel J. Velleman)在讲解数学归纳法与证明结构时频繁使用该术语。
  • Concrete Mathematics(Graham, Knuth, Patashnik)在递推关系与归纳证明的讨论中常出现“inductive hypothesis”。
  • Discrete Mathematics and Its Applications(Kenneth H. Rosen)在离散数学证明方法章节中常用该表达说明归纳步骤。
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