Number theory-- Algebra-- Mathematics 5 Class field theory 3 Algebraic fields 2 Fourier and harmonic analysis 2 Number theory 2 Algebra 1 B Aparna (Guide) 1 Cryptography 1 Data encryption (Computer science) 1 Dictionary,Encyclopedia,Handbook etc 1 Fields 1 Lecture Notes in Mathematics 1 MARC formats 1 MATHEMATICS / Number Theory 1 PROPER OBSERVER 1 PROPER WORLD LINE; 1 PROPERTIME; 1 REAL NUMBER FIELD; 1 Security measures 1 TIMELOOP; 1 Telecommunication 1