"The famous geometer Desargues worked on the lines of Kepler and is now commonly credited with the authorship of some of the ideas of his predecessor. ...the oneness of opposite infinities followed simply and logically from a first principle of Desargues, that every two straight lines, including parallels, have or are to be regarded as having one common point and one only. A writer of his insight must have come to this conclusion, even if the paradox had not been held by Kepler, Briggs, and we know not how many others, before Desargues wrote. ...Desargues must have learned directly or indirectly from the work in which Kepler propounded his new theory of these points, first called by him the Foci (foyers), including the modern doctrine of real points at infinity."
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Charles Taylor, "The Geometry of Kepler and Newton," (1899) Transactions of the Cambridge Philosophical Society (1900) pp. 197-219
https://en.wikiquote.org/wiki/Girard_Desargues
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Girard Desargues
(21 February 1591 – September 1661) was a French mathematician, architect and engineer, who is considered one of the founders of . , the , and the Desargues crater are named in his honour.
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