View source for Mixed problem

A problem involving (systems of) partial differential equations, with [[Initial conditions|initial conditions]] and [[Boundary conditions|boundary conditions]], and also problems with data on both characteristic and non-characteristic oriented manifolds (see [[Mixed and boundary value problems for hyperbolic equations and systems|Mixed and boundary value problems for hyperbolic equations and systems]]; [[Mixed and boundary value problems for parabolic equations and systems|Mixed and boundary value problems for parabolic equations and systems]]; [[Mixed-type differential equation|Mixed-type differential equation]]). The term mixed problem is also applied to boundary value problems for elliptic equations when on various parts of the boundary conditions of different kinds are given (see [[Boundary value problem, elliptic equations|Boundary value problem, elliptic equations]]).