Q
Symbol  Format  Data 

Q  Code Point 
U+0051 
TeX 
Q 

SVG 
The capital Latin letter Q is used in mathematics to represent the set of natural numbers. Usually, the letter is presented with a “doublestruck” typeface when it is used to represent the set of rational numbers.
The set of rational numbers is denoted with the Latin Capital letter Q presented in a doublestruck typeface.
The latin letter q.