Graphmath.Vec3.scalar_triple

You're seeing just the function scalar_triple, go back to Graphmath.Vec3 module for more information.
Link to this function

scalar_triple(arg1, arg2, arg3)

Specs

scalar_triple(vec3(), vec3(), vec3()) :: float()

scalar_triple(a,b,c) returns the scalar triple product of three vectors.

We're using the a*(b x c) form.