Some new GP features
lambertw
lambertw now supports complex arguments and all branches.
? l=lambertw(-1/4)
%66 = -0.3574029561813889031
? l*exp(l)
%67 = -0.2500000000000000000
? l=lambertw(-1)
%68 = -0.3181315052047641353+1.337235701430689409*I
? l*exp(l)
%69 = -1.000000000000000000+5.421010862427522170E-20
? l=lambertw(-1,1)
%70 = -2.062277729598283885+7.588631178472512623*I
? l*exp(l)
%71 = -1.000000000000000000+1.355252715606880543E-19