partial differential equations mathematics 43 mathematical analysis 33 numerical analysis 30 differential equations 28 finite elements method 21 parabolic equations 16 more ... calculus of variations 16 elliptic equations 15 functional analysis 13 global analysis 13 numerical solution of equations 12 global differential geometry 11 applied mathematics 10 mathematical physics 10 differential geometry 9 ordinary differential equations 9 dynamic systems 9 hydromechanics 9 integral equations 9 mathematical models 9 operator theory 9 image processing 9 algebraic geometry 8 systems theory 8 complex variable function 7 physics 7 harmonic analysis 7 boundary value problems 7 manifolds 7 less ...