Self-adjoint Jacobi operators in the limit circle case
arXiv:2104.13609
Abstract
We consider symmetric Jacobi operators with recurrence coefficients such that the corresponding difference equation is in the limit circle case. Equivalently, this means that the associated moment problem is indeterminate. Our main goal is to find a representation for the resolvents of self-adjoint realizations of such Jacobi operators. This representation implies the classical Nevanlinna formula for the Cauchy-Stieltjes transforms of the spectral measures of the operators . We also efficiently describe domains of the operators in terms of boundary conditions at infinity.