Logarithmic integral function: Difference between revisions

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{{mergetoMergeto|logarithmic integral|date=May 2007}}

:''See also [[logarithmic integral]] for other senses.''

In [[mathematics]], the '''logarithmic integral function''' or '''integral logarithm''' li(''x'') is a [[special function]]. It occurs in problems of [[physics]] and has [[number theory|number theoretic]] significance, occurring in the [[prime number theorem]] as an [[estimate]] of the number of [[prime number]]s less than a given value.

[[Image:Logarithmic_integralLogarithmic integral.svg|thumb|right|Logarithmic integral]]

==Integral representation==