What is the Complexity of Related Elliptic, Parabolic, and Hyperbolic Problems?

Analysis of algorithms and problem complexity (68Q25) Boundary value problems for higher-order elliptic equations (35J40) Error bounds for boundary value problems involving PDEs (65N15) Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs (65N30) Finite element, Rayleigh-Ritz and Galerkin methods for initial value and initial-boundary value problems involving PDEs (65M60) Error bounds for initial value and initial-boundary value problems involving PDEs (65M15) Applications to the sciences (65Z05) Higher-order hyperbolic equations (35L25) Higher-order parabolic equations (35K25)