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'fragments/reports', 'works' and 'Knowledge and the Philosophy of Number'
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6. Mathematics / A. Nature of Mathematics / 5. The Infinite / h. Ordinal infinity
23626
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Transfinite ordinals are needed in proof theory, and for recursive functions and computability [Hossack]
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6. Mathematics / B. Foundations for Mathematics / 6. Mathematics as Set Theory / b. Mathematics is not set theory
23621
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Numbers are properties, not sets (because numbers are magnitudes) [Hossack]
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6. Mathematics / C. Sources of Mathematics / 1. Mathematical Platonism / a. For mathematical platonism
23622
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We can only mentally construct potential infinities, but maths needs actual infinities [Hossack]
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