U+2244 Not Asymptotically Equal To

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In mathematical analysis, asymptotic analysis, also known as asymptotics, is a method of describing limiting behavior.

As an illustration, suppose that we are interested in the properties of a function f (n) as n becomes very large. If f(n) = n² + 3n, then as n becomes very large, the term 3n becomes insignificant compared to n². The function f(n) is said to be "asymptotically equivalent to n², as n → ∞". This is often written symbolically as f (n) ~ n², which is read as "f(n) is asymptotic to n²".

An example of an important asymptotic result is the prime number theorem. Let π(x) denote the prime-counting function (which is not directly related to the constant pi), i.e. π(x) is the number of prime numbers that are less than or equal to x. Then the theorem states that

Asymptotic analysis is commonly used in computer science as part of the analysis of algorithms and is often expressed there in terms of big O notation.