Operators and Matrices · Volume 12, Issue 2 Eigenvalue interlacing for first order differential systems with periodic 2 × 2 matrix potentials and quasi-periodic boundary conditions 12-30 Pages 489-499 DOI 10.7153/oam-2018-12-30 Downloads Short PDF Full PDF PNG Authors Sonja Currie Thomas T. Roth Bruce A. Watson Keywords Dirac system quasi-periodic eigenvalue problems interlacing Subject classes 34L40 34C10 34C25