Necessary conditions for strong hyperbolicity of first order systems
Noncharacteristic mixed problems for hyperbolic systems of the first order [Book]
Nonlocal problem for the hyperbolic system of differential equation of the first order.
Nonlocal problems for quasilinear functional partial differential equations of first order.
Existence and uniqueness of almost everywhere solutions of nonlocal problems to functional partial differential systems in diagonal form are investigated. The proof is based on the characteristics and fixed point methods.
Normal forms of real symmetric systems with multiplicity