Number theory-- Algebra-- Mathematics 229 Number theory 181 Mathematics 165 Agronomy 77 Economics 72 History 59 Set theory-- Fuzzy sets-- Transfinite numbers 49 Agriculture 40 Algebra 40 Plant Breeding and Genetics 35 Soil Science and Agricultural Chemistry 32 Plant Biotechnology 31 Agricultural Entomology 28 Algebraic number theory-- Invariant theory-- P-adic numbers-- Quadratic forms-- Algebraic function 27 Mathematical analysis 27 Philosophy 23 Algebraic number theory 22 Statistics 21 Calculus 20 Plantation Crops and Spices 20 Data processing 19 Cryptography 18 Plant Pathology 18 Sociology 18 Plant Biotechnology and Molecular Biology 17 Plant Physiology 17 Numbers, Complex 16 Numbers, Prime 16 Social aspects 16 Agricultural Extension 15