…American mathematician. Born in Cincinnati. Studied at Harvard University, where he received his doctorate. Became a professor at the University of Illinois in 1935. He conducted systematic research into the foundations of stochastic processes, particularly the theory of separable deformations and martingales, and the results of his research were included in his book Stochastic Processes, published in 1953. Martingales are important stochastic processes that can be considered a model for fair gambling. P. Levi and others began researching martingales, and Doob also introduced the concept of submartingales, creating a beautiful theory that could be called the stochastic version of the theory of (sub)harmonic functions in analysis. … *Some of the terminology explanations that mention "Doob, JL" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…アメリカの数学者。シンシナティに生まれる。ハーバード大学に学び,ここで学位を得た。1935年以来イリノイ大学に所属し,45年教授となる。確率過程論の基礎に関する系統的研究を行い,とくに可分変形の理論とマルチンゲールの理論は著しく,その成果は53年刊行の著書《確率過程》に収められている。マルチンゲールは公平なかけ事のモデルと考えられる重要な確率過程であり,P.レビらが研究を始めたが,ドゥーブはそれとともに劣マルチンゲールという概念も導入し,解析学における(劣)調和関数論の確率論版ともいうべき美しい理論を作った。… ※「Doob,J.L.」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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