Mathematical optimization 191 Control theory 44 Congresses 35 Mathematical models 23 System analysis 15 Data processing 14 Programming (Mathematics) 13 Maxima and minima 10 Nonlinear programming 10 Calculus of variations 7 Approximation theory 6 Structural design 6 Engineering design 5 Functional analysis 5 Operations research 5 Automatic control 4 Differential equations 4 Economics, Mathematical 4 Numerical analysis 4 Stochastic processes 4 Algorithms 3 Decision making 3 Distributed parameter systems 3 Economic policy 3 Resource allocation 3 Structural analysis (Engineering) 3 Systems engineering 3 ALGOL (Computer program language) 2 Chemical processes 2 Computational complexity 2