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Richard K. Lashof (November 9, 1922 – February 4, 2010) was an American mathematician. He contributed to the field of geometric and differential topology, working with Shiing-Shen Chern, Stephen Smale, among others. Lashof is regarded as "the key figure in sustaining the Chicago Mathematics Department as an international center for research and the training of topologists" by Melvin Rothenberg.