Combining Texts

All the ideas for 'Set Theory and related topics (2nd ed)', 'Notice of Fine's 'Limits of Abstraction'' and 'Letters to Jacques Lenfant'

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3 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / e. Equivalence classes
Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz]
8. Modes of Existence / C. Powers and Dispositions / 2. Powers as Basic
The most primitive thing in substances is force, which leads to their actions and dispositions [Leibniz]
18. Thought / E. Abstraction / 7. Abstracta by Equivalence
Abstraction theories build mathematics out of second-order equivalence principles [Cook/Ebert]