LICKS integration of 1/ln(x) (1 Viewer)

[adomad]

li(x)? a few pepole in my maths class tried equating this integral only to find that a few more hundred integrals needed to be done... so i went to wolfram alpha and was surprised by the answer... Li(x)? has anyone come across this?

 

[Iruka]

There are about a billion and one special functions like that.

Logarithmic Integral -- from Wolfram MathWorld

There is also a sine integral, cosine integral and an exponential integral, and so on.