Operators and Matrices · Volume 9, Issue 2 Spectral gap estimates for some block matrices 09-15 Pages 241-275 DOI 10.7153/oam-09-15 Downloads Short PDF Full PDF PNG Authors Ivan Veselić Krešimir Veselić Keywords spectral gap estimates block matrices quais-definite matrices Stokes matrices Dirac symmetry spectral pollution Subject classes 15A60 47A75 15A22