The mirror thing smells like bs. How the hell can he calculate what the mathematical curvatures should be without the actual flat reflection? He only has the possibly mathematically incorrect original reflection and has to do transformations from there.
And he has to do two transformations. He has to do inversion and apply some spherical transformation. The inversion itself already had to make a bunch of assumptions. It's just a bad analysis for the sake of pretensioceness.
And he has to do two transformations. He has to do inversion and apply some spherical transformation. The inversion itself already had to make a bunch of assumptions. It's just a bad analysis for the sake of pretensioceness.