Mengi, EmreKangal, Fatih2024-11-092013https://hdl.handle.net/20.500.14288/4120viii, 45 l. : ill. 30 cm.restrictedAccessSpectral theory (Mathematics)Spectrum analysisEigenvaluesGeneralized pseudospectra in connection with multiple eigenvaluesThesis© All Rights Reserved. Accessible to Koç University Affiliated Users Only!