≂

Description
A minus sign (−) above a tilde (∼).

Symbol
In mathematics, the symbol $$ \eqsim $$ usually indicates that two quantities are equal up to constants: $$ A \eqsim B $$ means that there exist two positive constants $$c_1$$ and $$c_2$$ such that $$c_1 B \le A \le c_2 B$$