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In mathematics, the Pidduck polynomialssn(x) are polynomials introduced by Pidduck given by the generating function
↑Pidduck, F. B. (1912), "The Wave-Problem of Cauchy and Poisson for Finite Depth and Slightly Compressible Fluid", Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 86 (588), The Royal Society: 396–405, Bibcode:1912RSPSA..86..396P, doi:10.1098/rspa.1912.0031, ISSN0950-1207, JSTOR93103