M. Grigolia
abstract:
For a nonlinear hyperbolic system with two independent variables a priori 
estimates of solutions of a general initial problem are established. On the 
basis of these estimates sufficient conditions for the solvability and well-posedness 
of this problem are found.
Mathematics Subject Classification: 35L15, 35L70
Key words and phrases: Nonlinear hyperbolic system, initial problem, characteristic problem, Goursat problem, Darboux problem, Cauchy problem, a priori estimate, solvability, well-posedness.