Number theory Algebraic Topology 3 Algebraic topology 3 Number Theory 3 Algebraic Geometry 2 Algebraic geometry 2 Category Theory, Homological Algebra 2 Combinatorial analysis 2 Functional Analysis 2 Functional analysis 2 K-Theory 2 K-theory 2 Algebra 1 Algebra, Homological 1 Category theory (Mathematics) 1 Central bank 1 Combinatorial number theory 1 Computer arithmetic 1 Computer programming 1 Computer science 1 Cryptocurrency 1 Cryptography 1 Curves, Elliptic 1 Denomination 1 Differential Geometry 1 Digital currency 1 Financial Services 1 Financial services industry 1 Geometry, Algebraic 1 Geometry, Differential 1