Well-posedness and propagation of singularities for initial boundary value problem for second order hyperbolic equation with general boundary condition G. Eskin (1979-1980) Séminaire Équations aux dérivées partielles (Polytechnique) Similarity:
On the mixed partial differential equations in n independent variables Chaohao Gu (1980) Journées équations aux dérivées partielles Similarity: