V2EX asymptotic analysis

Asymptotic Analysis

Definition|释义

“渐近分析”:一种研究函数、算法或序列在输入规模趋于无穷大(或趋于某个极限点)时的增长趋势与主要行为的方法。常用于比较算法复杂度(如大 O 记号)和近似表达式;在数学中也用于研究渐近展开与误差项。(在不同学科中侧重点略有不同。)

Pronunciation|发音(IPA)

/smttk nlss/

Examples|例句

Asymptotic analysis helps us understand how an algorithm scales.
渐近分析帮助我们理解一个算法如何随规模增长而变化。

Using asymptotic analysis, the paper derives a tighter bound on the runtime by comparing lower-order terms and error estimates.
通过渐近分析,论文通过比较低阶项与误差估计,推导出更紧的运行时间界。

Etymology|词源

“Asymptotic”来自希腊语词根 *a-*(不)+ *sym-*(一起)+ ptotos(落下/趋向),原意与“渐近线”相关:曲线不断接近但不相交的线;后来引申为“在极限情况下的行为”。“Analysis”源自希腊语 analysis,意为“分解、解析”。合在一起即“研究极限趋势的解析方法”。

Related Words|相关词

Literary Works|文学与名著中的用例

  • The Art of Computer Programming(Donald E. Knuth)
  • Concrete Mathematics(Ronald L. Graham, Donald E. Knuth, Oren Patashnik)
  • Analytic Combinatorics(Philippe Flajolet, Robert Sedgewick)
  • Introduction to Algorithms(Thomas H. Cormen 等)
  • Asymptotic Methods in Analysis(N. G. de Bruijn)
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