Arithmetic deals with numbers: but what is the nature of their existence, of their parts, and of their relationship with countable items? These questions nourished a lively debate between the Platonico-Pythagorean tradition (trying to answer them) and the Pyrrhonian tradition (trying to show that these answers were unsatisfactory). The debate lies at the heart of Sextus Empiricusâ Against the Arithmeticians. The present book aims at facing the remarkable historical and philosophical questions raised by Sextusâ treatise by offering a new translation of it and the first dedicated commentary to it.
Introduction
â1âSextusâ Life and Works
â2âAgainst the Professors: A Glance at Sextusâ Targets, Method, and Sources
â3âAgainst the Arithmeticians: An Introductory Overview
â4âOriginality and Interest of the Present Work
Translation
Commentary
1 M IV 1: Quantities, Number, and Arithmetic
â1âTextual Remarks
â2âSextusâ Distinction of Continuous and Discrete Quantities and Its Aristotelian Origin
â3âArithmetic, Philosophy of Number, and Sextusâ Strategy in M IV
2 M IV 2â10: The Derivation System, the Old Academy, and Posidonius
â1âTextual Remarks
â2âNotes on the Translation
â3âWhat Is the Ultimate Origin of the Dogmatic Doctrine Described in M IV 2â10?
â4âSextusâ Accounts of the Pythagorean Doctrine at M IV 2â10 and at M IV 92â109, and Posidonius
3 M IV 11â20: Sextusâ Attack on the One
â1âTextual Remarks
â2âThe Two âPlatonicâ Characterisations of the One (M IV 11)
â3âThe Argument in Support of the Platonist Conception of the One (M IV 11â13)
â4âThe First Cluster of Arguments against the Platonist Conception of the One (M IV 14â18)
â5âThe Second Argument against the Platonist Conception of the One (M IV 18â20)
4 M IV 21â2: Sextusâ Attack on the Two
â1âTextual Remarks
â2âSextusâ Argument against the Number Two: M IV 21â2 in the Light of M X 308â9
â3âThe Origin of the Puzzle: Plato, Phaedo 96eâ97b, 101 bâc
â4âNumber and Generation: PH III 164â5 and M X 323, 328â30
5 M IV 23â30: Sextusâ Attack on Number Conceived of as the Result of the Subtraction of a Unit
â1âIntroduction
â2âM IX 311â20 and PH III 88â93
â3âM IV 23â30 in the Light of the loci similes
â4âM IV 24â5: Number, Whole, and Substance
6 M IV 31â4: Sextusâ Attack on Number Conceived of as the Result of the Addition of a Unit
â1âIntroduction
â2âM IV 31â2: Number, Units, and Conceptual Parts
â3âM IV 33: Number, Addition, and Generation
Conclusion Bibliography
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