Moszynski, K. Sull’approssimazione spettrale di operatori lineari in spazi di Banach. (Italian) Zbl 0457.47006 Pubbl., Ser. III, Ist. Appl. Calcolo 131, 40 p. (1978). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 47A10 Spectrum, resolvent 47B06 Riesz operators; eigenvalue distributions; approximation numbers, \(s\)-numbers, Kolmogorov numbers, entropy numbers, etc. of operators 47B44 Linear accretive operators, dissipative operators, etc. 46E35 Sobolev spaces and other spaces of “smooth” functions, embedding theorems, trace theorems 46E99 Linear function spaces and their duals Keywords:operator resolvent; spectrum; approximation; integral formula for spectral projections; coercivity PDFBibTeX XML