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Line 36: ==Special values== The function li(''x'') has a single positive zero; it occurs at ''x'' ≈ 1.45136 92348 ...; this number is known as the [[Ramanujan-Soldner constant]]. One has li(2) ≈ 1.04516 37801 17492 ... ==Asymptotic expansion==

Logarithmic integral function: Difference between revisions