Hours 36L Elementary topics in number theory: arithmetic functions; polynomials over the residue classes modulo m, characters on the residue classes modulo m; quadratic reciprocity law, representation of numbers as sums of squares. Prerequisite ( MAT223H1/ MATA23H3/ MAT223H5/ MAT240H1/ MAT240H5, MAT235Y1/ MAT235Y5/ ( MAT232H5, MAT236H5)/ ( MATB41H3, MATB42H3)/ MAT237Y1/ ( MATB41H3, MATB42H3, MATB43H3)/ MAT237Y5, MAT246H1/ CSC236H1/ CSC240H1)/ MAT157Y1/ MAT157Y5/ ( MAT157H5, MAT159H5)/ MAT247H1/ MAT247H5 Breadth Requirements The Physical and Mathematical Universes (5)