In this paper,we investigate a class of mixed initial-boundary value problems for a kind of n×n quasilinearhyperbolic systems of conservation laws on the quarter plan.We show that the structure of the piecewise C...In this paper,we investigate a class of mixed initial-boundary value problems for a kind of n×n quasilinearhyperbolic systems of conservation laws on the quarter plan.We show that the structure of the piecewise C^1 solutionu = u(t,x) of the problem,which can be regarded as a perturbation of the corresponding Riemann problem,is globallysimilar to that of the solution u=U(x/t) of the corresponding Riemann problem.The piecewise C^1 solution u=u(t,x)to this kind of problems is globally structure-stable if and only if it contains only non-degenerate shocks and contactdiscontinuities,but no rarefaction waves and other weak discontinuities.展开更多
In this paper we investigate the formation of singularities of hyperbolic systems.Employing the method of parametric coordinates and the existence of the solution of the blow-up system, we prove that the blow-up of cl...In this paper we investigate the formation of singularities of hyperbolic systems.Employing the method of parametric coordinates and the existence of the solution of the blow-up system, we prove that the blow-up of classic solutions is due to the envelope of characteristics of the same family, analyze the geometric properties of the envelope of characteristics and estimate the blowup rates of the solution precisely.展开更多
基金supported by the National Natural Science Foundation of China under Grant No.10671124
文摘In this paper,we investigate a class of mixed initial-boundary value problems for a kind of n×n quasilinearhyperbolic systems of conservation laws on the quarter plan.We show that the structure of the piecewise C^1 solutionu = u(t,x) of the problem,which can be regarded as a perturbation of the corresponding Riemann problem,is globallysimilar to that of the solution u=U(x/t) of the corresponding Riemann problem.The piecewise C^1 solution u=u(t,x)to this kind of problems is globally structure-stable if and only if it contains only non-degenerate shocks and contactdiscontinuities,but no rarefaction waves and other weak discontinuities.
文摘In this paper we investigate the formation of singularities of hyperbolic systems.Employing the method of parametric coordinates and the existence of the solution of the blow-up system, we prove that the blow-up of classic solutions is due to the envelope of characteristics of the same family, analyze the geometric properties of the envelope of characteristics and estimate the blowup rates of the solution precisely.
基金Project supported by the Special Funds for Major State Basic Research Project of ChinaSpecialized Research Fund for the Doctoral Program of Higher Education (No. 20020246002).
基金The research was supported by the National Natural Science Foundation of China #10625105 and #10431060, the Program for New Century Excellent Talents in University #NCET-04-0745. Acknowledgement Authors would like to thank the anonymous referee for his/her helpful suggestions and comments.