\DiamondThe \Diamond symbol is often used in mathematical logic and modal logic to represent the 'possibility' operator. It can also be used in set theory and other mathematical contexts to denote various operations or relations.
In modal logic, this denotes that 'A is possibly true'.
\Diamond ARepresents the possibility that both p and q are true in modal logic.
\Diamond (p \land q)In some contexts, this can denote a special relation or operation between x and y.
\Diamond x = y