Combining Philosophers
Ideas for Friedrich Schlegel, John Stuart Mill and Theophrastus
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6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / a. Axioms for numbers
8742

The only axioms needed are for equality, addition, and successive numbers [Mill, by Shapiro]

6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / b. Greek arithmetic
9800

Arithmetic is based on definitions, and Sums of equals are equal, and Differences of equals are equal [Mill]
