A structure named for this scientist considers the universe as a four-dimensional affine space and requires a space of simultaneous events and a distance between those events. Taking the contraction of the Poincaré (“pwon-car-AY”) group as the speed of light tends to infinity yields a group named for this scientist. A nonrelativistic tensor named for this scientist is constructed in the light cone of a (4,1) (“four-one”) Minkowski space. This man is not Hamilton, but a rotation, a translation, and uniform motion are used to uniquely write a transformation named for this man. Newton’s laws are the same in all inertial reference frames while Lorentz transforms are replaced by this man’s transforms in a form of invariance named for this man. For 10 points, name this scientist who allegedly disproved Aristotelian gravity by dropping things off the Leaning Tower of Pisa. ■END■