S. Kharibegashvili
abstract:
For one class of symmetric hyperbolic systems of first order we study some 
boundary value problems in a dihedral angle none of whose faces meets an 
exterior cone of rays. To this class of systems belong Maxwell and Dirac 
equations, equations of crystal optics and also some other systems of equations 
of the mathematical physics.
Mathematics Subject Classification: 35L50.
Key words and phrases: Symmetric hyperbolic systems, boundary value problems, dihedral angle, Maxwell and Dirac systems of crystal optics.