Einstein on involutions in projective geometry
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Abstract
We discuss Einstein’s knowledge of projective geometry. We show that two pages of Einstein’s Scratch Notebook from around 1912 with geometrical sketches can directly be associated with similar sketches in manuscript pages dating from his Princeton years. By this correspondence, we show that the sketches are all related to a common theme, the discussion of involution in a projective geometry setting with particular emphasis on the infinite point. We offer a conjecture as to the probable purpose of these geometric considerations.
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Archive for history of exact sciences, 75, Springer, Berlin u.a., 2021, https://doi.org/10.1007/s00407-020-00270-z