Series Representation
The function li(x) is related to the exponential integral Ei(x) via the equation
which is valid for x > 0. This identity provides a series representation of li(x) as
where γ ≈ 0.57721 56649 01532 ... is the Euler–Mascheroni gamma constant. A more rapidly convergent series due to Ramanujan is
Read more about this topic: Logarithmic Integral Function
Famous quotes containing the word series:
“Mortality: not acquittal but a series of postponements is what we hope for.”
—Mason Cooley (b. 1927)