Ììì Áööööù Blockin Blockin Blockin Blockinððøý Óó Øøø ×××ð Èóðýòóñññð×

Abstra t: In the early 1950's, Emil Grosswald began investigating the irredu ibility of the Bessel polynomials yn(x) and onje tured the irredu ibility of yn(x) over the rationals for all positive integers n. This paper resolves the onje ture by establishing the irredu ibility of a lass of polynomials that in ludes the Bessel polynomials.