. . . . . "Garrett Birkhoff"@en . . "1911-01-19Z"^^ . . . . . "Garrett Birkhoff (January 19, 1911 \u2013 November 22, 1996) was an American mathematician. He is best known for his work in lattice theory.The mathematician George Birkhoff (1884\u20131944) was his father."@en . . . . . . . . "Birkhoff, Garrett"@en . . . . . "American mathematician" . "1996-11-22Z"^^ . . . . . . "1996Z"^^ . "1911Z"^^ . .