 They are given in terms of the generalized hypergeometric function by
where formula_2 are Laguerre polynomials.They satisfy the orthogonality relation






Giovanni Arcangeli

Giovanni Arcangeli (18 July 1840 – 16 July 1921) was an Italian botanist from Florence.In 1862 he earned his degree in natural sciences from the University of Pisa, where he later became an instructor and professor.