Differential equations 25 Dissertations 22 Dissertations, Academic 21 Numerical solutions 18 Differential equations, Partial 14 Differential equations, Linear 7 Differential equations, Nonlinear 7 Mathematics 5 Fractional calculus 4 Heat 4 Homotopy theory 4 Iterative methods (Mathematics) 4 Mathematical models 3 Study and teaching (Secondary) 3 Boundary value problems 2 Data processing 2 Delay differential equations 2 Differential equations, Elliptic 2 Finite differences 2 Fluid dynamics 2 Functional differential equations 2 Inverse problems (Differential equations) 2 Linear systems 2 Mathematical analysis 2 Numerical analysis 2 Oscillations 2 Parallel processing (Electronic computers) 2 Stability 2 Transmission 2 Wavelets (Mathematics) 2