Operators and Matrices · Volume 14, Issue 3 Self-adjoint extensions of the two-valley Dirac operator with discontinuous infinite mass boundary conditions 14-42 Pages 667-678 DOI 10.7153/oam-2020-14-42 Downloads Short PDF Full PDF PNG Authors Biagio Cassano Vladimir Lotoreichik Keywords Dirac operator infinite mass boundary condition wedge self-adjoint extensions mixing the valleys Subject classes 35P05 35Q40 81Q10