Functional equations Difference and Functional Equations 64 Difference equations 64 Dynamics 17 Differential equations 16 Ordinary Differential Equations 16 Dynamical Systems and Ergodic Theory 13 more ... Ergodic theory 13 Partial Differential Equations 12 Partial differential equations 12 Applied mathematics 9 Engineering mathematics 9 Analysis 8 Analysis (Mathematics) 8 Functional Analysis 8 Functional analysis 8 Mathematical analysis 8 Applications of Mathematics 7 Calculus of Variations and Optimal Control; Optimization 7 Calculus of variations 7 System theory 7 Systems Theory, Control 7 Algebra 6 Functions of complex variables 6 Biomathematics 5 Computational Mathematics and Numerical Analysis 5 Computer mathematics 5 Control engineering 5 Functions of a Complex Variable 5 Special Functions 5 less ...