\text{\O}The symbol \text{\O} represents the uppercase letter 'Ø', which is used in various languages such as Danish, Norwegian, and Faroese. It is also used in mathematics and engineering to denote an empty set or a diameter symbol.
Represents an empty set in mathematics.
\text{\O} = \{\}Used as a symbol for diameter in engineering drawings.
\text{Diameter} = 50\text{\O}Represents the letter 'Ø' in Danish and Norwegian.
\text{The letter \O is used in Danish and Norwegian alphabets}