E1 E1_sub Ei Ei_sub En En_sub Li Li_sub Spence Spence_sub

Spence_sub() Sub Spence_sub ( Ret As  Double, X As  Double, Optional Info As  Long  ) Spence's function (dilogarithm) Li2(x) (Subroutine version) Purpose Computes a Spence's function (dilogarithm). Li2(x) = ∫ -ln(1-t)/t dt [0, x] Parameters [out] Ret Spence's function Li2(x). [in] X Argument x. [out] Info (Optional) = 0: Successful exit. = 1: Floating point range error.