Mathematical models 2,476 Mathematics 1,724 Congresses 467 Mathematical statistics 338 Data processing 270 Logic, Symbolic and mathematical 264 Mathematical physics 207 Mathematical optimization 191 Economics, Mathematical 183 Study and teaching 176 Economics 143 Engineering mathematics 138 Mathematical analysis 136 Science 124 Economic conditions 115 Economic policy 111 Decision-making 107 Periodicals 105 Probabilities 100 History 89 Industrial management 89 Study and teaching (Primary) 84 Philosophy 82 Study and teaching (Secondary) 81 Economic development 78 Operations research 78 Physics 78 Statistics 77 Problems, exercises, etc 76 Programming (Mathematics) 76