Isador Mitchell Sheffer (October 15, 1901–April 20, 1992) was an American mathematician best known for the Sheffer sequence of polynomials.
[1] Born in Massachusetts, he lived a large portion of his life in State College, Pennsylvania, where he was a Professor of Mathematics at Pennsylvania State University.
He received his PhD from Harvard University in 1927, under the direction of George Birkhoff.
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