Combining Texts
Ideas for
'The Evolution of Logic', 'Laudatio: Prof Ruth Barcan Marcus' and 'Posterior Analytics'
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9 ideas
6. Mathematics / A. Nature of Mathematics / 1. Mathematics
12377
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Mathematics is concerned with forms, not with superficial properties [Aristotle]
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6. Mathematics / A. Nature of Mathematics / 2. Geometry
12372
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The essence of a triangle comes from the line, mentioned in any account of triangles [Aristotle]
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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / e. Ordinal numbers
13459
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The less-than relation < well-orders, and partially orders, and totally orders the ordinal numbers [Hart,WD]
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13463
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There are at least as many infinite cardinals as transfinite ordinals (because they will map) [Hart,WD]
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13491
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The axiom of infinity with separation gives a least limit ordinal ω [Hart,WD]
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13492
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Von Neumann's ordinals generalise into the transfinite better, because Zermelo's ω is a singleton [Hart,WD]
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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / g. Real numbers
13446
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19th century arithmetization of analysis isolated the real numbers from geometry [Hart,WD]
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6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / a. Units
12369
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A unit is what is quantitatively indivisible [Aristotle]
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6. Mathematics / A. Nature of Mathematics / 5. The Infinite / a. The Infinite
13509
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We can establish truths about infinite numbers by means of induction [Hart,WD]
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