Integral Equations Integral equations 61 Partial Differential Equations 31 Partial differential equations 31 Differential equations 18 Ordinary Differential Equations 17 Operator Theory 16 more ... Operator theory 16 Functional Analysis 14 Functional analysis 14 Analysis 12 Analysis (Mathematics) 12 Mathematical analysis 12 Applied mathematics 9 Engineering mathematics 9 Mathematical physics 8 Numerical Analysis 8 Numerical analysis 8 Physics 8 Integral Transforms, Operational Calculus 7 Integral transforms 7 Mathematical and Computational Engineering 7 Operational calculus 7 Algebra 6 Fourier Analysis 6 Fourier analysis 6 Mathematical Methods in Physics 6 Probabilities 6 Probability Theory and Stochastic Processes 6 Mechanics 5 less ...