Rethinking geometrical exactness |
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Authors: | Marco Panza |
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Institution: | IHPST (CNRS, University of Paris 1, ENS Paris), 13 rue du Four, 75006 Paris, France |
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Abstract: | A crucial concern of early modern geometry was fixing appropriate norms for deciding whether some objects, procedures, or arguments should or should not be allowed into it. According to Bos, this is the exactness concern. I argue that Descartes’s way of responding to this concern was to suggest an appropriate conservative extension of Euclid’s plane geometry (EPG). In Section 2, I outline the exactness concern as, I think, it appeared to Descartes. In Section 3, I account for Descartes’s views on exactness and for his attitude towards the most common sorts of constructions in classical geometry. I also explain in which sense his geometry can be conceived as a conservative extension of EPG. I conclude by briefly discussing some structural similarities and differences between Descartes’s geometry and EPG. |
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Keywords: | 01-02 01A20 01A45 |
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