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5.9.6  The logarithmic integral function:Li

The Li command takes as argument a complex number.
Li returns the value of the logarithmic integral function Li at the point, where

Li(x) = Ei(ln(x)) = 
exp(x)


t=0
 
1
ln(t)
 dt

Input:

Li(2.0)

Output:

1.04516378012

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