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'Thinking About Mathematics', 'On Signs (damaged)' and 'Philosophy of Mathematics'
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10 ideas
6. Mathematics / B. Foundations for Mathematics / 1. Foundations for Mathematics
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8764
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Categories are the best foundation for mathematics [Shapiro]
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6. Mathematics / B. Foundations for Mathematics / 2. Proof in Mathematics
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9646
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There is no limit to how many ways something can be proved in mathematics [Brown,JR]
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9647
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Computers played an essential role in proving the four-colour theorem of maps [Brown,JR]
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6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / f. Zermelo numbers
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8762
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Two definitions of 3 in terms of sets disagree over whether 1 is a member of 3 [Shapiro]
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6. Mathematics / B. Foundations for Mathematics / 6. Mathematics as Set Theory / b. Mathematics is not set theory
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9643
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Set theory may represent all of mathematics, without actually being mathematics [Brown,JR]
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9644
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When graphs are defined set-theoretically, that won't cover unlabelled graphs [Brown,JR]
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6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / a. Structuralism
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8760
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Numbers do not exist independently; the essence of a number is its relations to other numbers [Shapiro]
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8761
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A 'system' is related objects; a 'pattern' or 'structure' abstracts the pure relations from them [Shapiro]
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6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / d. Platonist structuralism
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9625
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To see a structure in something, we must already have the idea of the structure [Brown,JR]
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6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / e. Structuralism critique
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9628
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Sets seem basic to mathematics, but they don't suit structuralism [Brown,JR]
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