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Elwyn Ralph Berlekamp (* 6. September 1940 in Dover; † 9. April 2019 in Piedmont) was an american mathematician. He was 78 years old. He had 3 children. He studied at Massachusetts Institute of Technology. He received 5 awards, including IEEE Richard W. Hamming Medal, Fellow of the American Academy of Arts and Sciences. His cause of death was pulmonary fibrosis.