Most common axiomatic geometry is Desarguian. Its projective. https://www.encycl...

		thr0000waay on April 13, 2018 \| parent \| context \| favorite \| on: Hubble Telescope Discovers a Light-Bending 'Einste... Most common axiomatic geometry is Desarguian. Its projective. https://www.encyclopediaofmath.org/index.php/Desargues_assum... When light is bent while passing by a huge mass, this axiom fails so does the geometry.