. "1981Z"^^ . . "Bernard Osgood Koopman (1900 \u2013 August 18, 1981) was a French-born American mathematician, known for his work in ergodic theory, the foundations of probability, statistical theory and operations research."@en . "American mathematician" . . "1981-08-18Z"^^ . . "Bernard Koopman"@en . . "Koopman, Bernard O."@en . . . . "1900Z"^^ .