\precsim
The symbol \precsim is used in mathematics to denote that one element is less than or approximately equal to another element. It is often used in contexts where a precise inequality is not known, but an approximate relationship is understood.
Element a is less than or approximately equal to element b.
a \precsim b
Function f(x) is less than or approximately equal to function g(x) for all x in the domain.
f(x) \precsim g(x)
The square of x is less than or approximately equal to the cube of x for large values of x.
x^2 \precsim x^3