When does a discrete differential pertubation of a sequence of orthonormal polynomials belong to l2

When does a discrete differential pertubation of a sequence of orthonormal polynomials belong to l²

@article{f842a83074cc11dbbee902004c4f4f50,

title = "When does a discrete differential pertubation of a sequence of orthonormal polynomials belong to l2",

author = "Christian Berg and Duran, {Antonio J.}",

year = "1996",

language = "English",

volume = "136",

pages = "127--153",

journal = "J. Funct. Anal.",

issn = "1083-6489",

publisher = "Institute of Mathematical Statistics",

}