Congresses 22 Set theory 8 Techniques in Biochemistry 7 Cytology-- Biology 6 Programming (Mathematics) 5 CYTOGENETICS 3 Combinatorial analysis 3 Crystals 3 Defects 3 Differential equations, Partial 3 Inference 3 Mathematics 3 Topology 3 Atherosclerosis 2 Banach spaces 2 Biochemistry 2 Biochemistry-- Biology 2 Biology 2 Cell membranes 2 Civil law 2 Comparative law 2 Computer networks 2 Constructive mathematics 2 Data processing 2 Descriptive set theory 2 Duality theory (Mathematics) 2 Economics 2 Electronic data processing 2 Electronic digital computers 2 Functional analysis 2