\gtrsimThe symbol \gtrsim is used in mathematics to denote that one quantity is greater than or approximately equal to another. It is often used in contexts where precision is not exact, but an approximate relationship is sufficient.
x is greater than or approximately equal to y
x \gtrsim yThe function f(n) grows at a rate greater than or approximately equal to n squared
f(n) \gtrsim n^2a is greater than or approximately equal to the sum of b and c
a \gtrsim b + c