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Ideas for 'The Evolution of Logic', 'Frege philosophy of mathematics' and 'Space, Time and Deity (2 vols)'

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3 ideas

6. Mathematics / B. Foundations for Mathematics / 3. Axioms for Geometry

13474

Euclid has a unique parallel, spherical geometry has none, and saddle geometry has several [Hart,WD]

6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / e. Structuralism critique

9829	The identity of a number may be fixed by something outside structure - by counting [Dummett]

9828	Numbers aren't fixed by position in a structure; it won't tell you whether to start with 0 or 1 [Dummett]