David Vernon Widder (25 March 1898 – 8 July 1990) was an American mathematician.
He earned his Ph.D. at Harvard University in 1924 under George Birkhoff and went on to join the faculty there.
He was a co-founder of the Duke Mathematical Journal and the author of the textbook Advanced Calculus (Prentice-Hall, 1947).
[1] He wrote also The Laplace transform[2] (in which he gave a first solution to Landau's problem on the Dirichlet eta function),[3] An introduction to transform theory,[4] and The convolution transform (co-author with I. I. Hirschman).
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