The Hille-Hardy formula is a bilinear generating function, involving products of Laguerre polynomials. We use the point of view, developed in previous publications, to propose an operational method which allows a fairly direct derivation of this kind of formulae.
La formula di Hille-Hardy è una funzione generatrice bilineare relativa a prodotti di polinomi di Hermite. In questo lavoro si utilizza il punto di vista sviluppato in precedenti pubblicazioni, per proporre una derivazione diretta di tale tipo di formula.
@article{RLIN_2003_9_14_2_85_0, author = {Giuseppe Dattoli}, title = {Derivation of the Hille-Hardy type formulae and operational methods}, journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni}, volume = {14}, year = {2003}, pages = {85-90}, zbl = {1072.33006}, mrnumber = {2053659}, language = {en}, url = {http://dml.mathdoc.fr/item/RLIN_2003_9_14_2_85_0} }
Dattoli, Giuseppe. Derivation of the Hille-Hardy type formulae and operational methods. Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni, Tome 14 (2003) pp. 85-90. http://gdmltest.u-ga.fr/item/RLIN_2003_9_14_2_85_0/
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