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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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LI.KEY
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1993-11-14
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337b
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* li external
li(x) is the ln integral function,
li(x) = inte(1/ln(t), t,0,x) = ei(ln(x)), li'(x)=1/ln(x).
li(n,x) is the incomplete ln integral function, li(n,x) =
inte(ln(t)^n, t,0,x) = ei(n,ln(x)), d(li(n,x),x) = ln(x)^n.
li(n,0) = 0.
See also: ei, gamma, erf, ci, si, li.