what is "li_2(y)"?



On Tue, 6 Feb 2007, li jing wrote:
> When I integrate a function, maxima returns with a long expression. It
> contains a strange part "li_2(y)" where 2 is a down index. What is such
> function? Can one give me some clue?
Dilogarithm
(Li_n(x) is polylogarithm)

Andrey