Harry Pollard (28 February 1919 – November 20, 1985)[1] was an American mathematician.
He received his Ph.D from Harvard University in 1942 under the supervision of David Widder.
He is known for his work on celestial mechanics, orthogonal polynomials and the n-body problem[1] as well as for the several textbooks he authored or co-authored.
[3][4] In the theory of Orthogonal polynomials, Pollard solved a conjecture of Antoni Zygmund, establishing mean convergence of the partial sums in
[5] The end point cases in Pollard's theorem was established by Sagun Chanillo.