
Perturbation Theory for Linear Operators (Classics in Mathematics, 132),

Perturbation Theory for Linear Operators (Classics in Mathematics, 132): Kato, Tosio: 9783540586616: Amazon.com: Books,

The Analysis of Linear Partial Differential Operators I: Distribution Theory and Fourier Analysis | SpringerLink,

Linear Operators, Part 1: General Theory: Nelson Dunford, Jacob T. Schwartz: 9780471608486: Amazon.com: Books,

Nonlinear Programming: Theory and Algorithms: Bazaraa, Mokhtar S., Sherali, Hanif D., Shetty, C. M.: 9780471486008: Amazon.com: Books