is a specific kind of: notation, notational system.

is a broader term that covers: number representation system, number system, numeration system, system of numeration | binary notation | decimal notation | octal notation | duodecimal notation | hexadecimal notation, sexadecimal notation | sign | decimal point, percentage point, point | exponent, index, power | fixed-point notation, fixed-point representation system | floating-point notation, floating-point representation system | infix notation | parenthesis-free notation ... show more.

is a part of: mathematical statement.