Logarithmic integral function: Difference between revisions

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Rephrase awkward double "occurs"
m Number theoretic significance: Li(x) = li(x) - li(2) is implicated in PNT
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The logarithmic integral is important in [[number theory]], appearing in estimates of the number of [[prime number]]s less than a given value. For example, the [[prime number theorem]] states that:
 
:<math>\pi(x)\sim\operatorname{liLi}(x)</math>
 
where <math>\pi(x)</math> denotes the number of primes smaller than or equal to <math>x</math>.