Pokrzywa, Andrzej. "Method of orthogonal projections and approximation of the spectrum of a bounded operator." Studia Mathematica 65.1 (1979): 21-29. <http://eudml.org/doc/218262>.
@article{Pokrzywa1979, author = {Pokrzywa, Andrzej}, journal = {Studia Mathematica}, keywords = {compression; essential spectrum; essential numerical range}, language = {eng}, number = {1}, pages = {21-29}, title = {Method of orthogonal projections and approximation of the spectrum of a bounded operator}, url = {http://eudml.org/doc/218262}, volume = {65}, year = {1979}, }
TY - JOUR AU - Pokrzywa, Andrzej TI - Method of orthogonal projections and approximation of the spectrum of a bounded operator JO - Studia Mathematica PY - 1979 VL - 65 IS - 1 SP - 21 EP - 29 LA - eng KW - compression; essential spectrum; essential numerical range UR - http://eudml.org/doc/218262 ER -