Finite-dimensional perturbations of spectral problems and variational approximation methods for eigenvalue problems. Part I. Finite-dimensional perturbations

Wydawnictwa / Czasopisma IMPAN / Studia Mathematica / Wszystkie zeszyty

N. Aronszajn, R. Brown Studia Mathematica 36 (1970), 1-76 DOI: 10.4064/sm-36-1-1-76