《Operative method》

Japanese: 《演算子法》 - えんざんしほう
《Operative method》

...the method of solving differential equations formally by performing differential and integral operations on functions symbolically or algebraically is called the operator method. At the end of the 19th century, British engineer O. Heaviside used this method successfully to solve ordinary differential equations that describe various phenomena in electrical engineering, as well as partial differential equations called the telegraph equation. Since then, operator method has become a unified theory.

*Some of the terminology explanations that mention "operator theory" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…関数に対する微分や積分の演算を記号的,あるいは代数的に行い,微分方程式を形式的に解く手法を演算子法という。19世紀の終りころに,イギリスの工学者O.ヘビサイドが電気工学におけるいろいろな現象を記述する常微分方程式や,電信方程式と呼ばれる偏微分方程式を解くのにこの手法で成功をおさめて以来,演算子法はまとまった一つの理論となった。…

※「《演算子法》」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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