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Superlinear Growth


Superlinear growth is growth of an eventually positive real-valued function f(x) faster than any constant multiple of x as x tends to infinity. It is characterized by the limit

 lim_(x->infty)(f(x))/x=infty.

Equivalently, f(x) in omega(x) in little-omega notation (Cormen et al. 2001, p. 48). The same definition applies to a sequence f(n) as n->infty.

For example, xlnx and x^(1+epsilon) for every fixed epsilon>0 have superlinear growth. A linear function ax with a>0 has linear growth instead, since its ratio to x is the constant a. Superlinear growth need not be bounded below by cx^(1+epsilon) for any fixed c>0 and epsilon>0. In particular, xlnx grows more slowly than every such power, since (xlnx)/x^(1+epsilon)->0 for every fixed epsilon>0.

This meaning is distinct from superlinear convergence, which concerns the decrease of errors in a convergent sequence.


See also

Asymptotic, Linear Growth, Little-Omega Notation

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References

Cormen, T. H.; Leiserson, C. E.; Rivest, R. L.; and Stein, C. Introduction to Algorithms, 2nd ed. Cambridge, MA: MIT Press, p. 48, 2001.

Cite this as:

Weisstein, Eric W. "Superlinear Growth." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/SuperlinearGrowth.html

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