First-order difference - one-third

Japanese: 1階差分 - いっかいさぶん
First-order difference - one-third

…For a constant h ≠ 0, ⊿ f ( t ) = f ( t + h ) - f ( t ) is called the first-order difference of f ( t ) (also called simply the difference, the definite difference, or the step difference), and finding the difference is called taking a difference. In this definition, t , h , and f ( t ) may be complex numbers. …

*Some of the terminology explanations that mention "first-order difference" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…定数h≠0に対して, ⊿f(t)=f(th)-f(t)をf(t)の1階差分(単に差分,定差,階差ともいう)といい,差分を求めることを差分するという。この定義において,t,h,f(t)は複素数であってもよい。…

※「1階差分」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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