The set of rational numbers is denoted with the Latin Capital letter Q presented in a double-struck type face. It is part of a family of symbols, presented with a double-struck type face, that represent the number sets used as a basis for mathematics.
The capital Latin letter Q is used in mathematics to represent the set of rational numbers. Usually, the letter is presented with a "double-struck" typeface when it is used to represent the set of rational numbers.
Set of natural numbers.
Set of integers symbol.
The set of real numbers symbol is a Latin capital R presented in double-struck typeface.
The set of complex numbers is represented by the Latin capital letter C. The symbol is often presented with a double-struck font face just as with other number sets. The set of complex numbers extends the real numbers.
The set of rational numbers can be defined by the quotient of two numbers belonging to the set of integers, where the divisor is non-zero.