"Leonard E. \"Len\" Gillman (January 8, 1917 \u2013 April 7, 2009) was an American mathematician, emeritus professor at the University of Texas at Austin. He was also an accomplished classical pianist."@en . . . "Gillman, Leonard E."@en . . . . . "1917-01-08Z"^^ . "Leonard Gillman"@en . "1917Z"^^ . "2009-04-07Z"^^ . . "2009Z"^^ . . . "American mathematician and classical pianist" . .