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3.15 Special functions

R lambert_w0(T x)

Implementation of the W0 branch of the Lambert W function, i.e., solution to the function W0(x)expW0(x)=x
Available since 2.25

R lambert_wm1(T x)
Implementation of the W1 branch of the Lambert W function, i.e., solution to the function W1(x)expW1(x)=x
Available since 2.25