Combining Texts

All the ideas for 'Set Theory and related topics (2nd ed)', 'The Analyst' and 'Socrates: Ironist and Moral Philosopher'

expand these ideas     |    start again     |     specify just one area for these texts

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3 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / e. Equivalence classes

8920	Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz]

6. Mathematics / A. Nature of Mathematics / 5. The Infinite / k. Infinitesimals

18091

Infinitesimals are ghosts of departed quantities [Berkeley]

25. Social Practice / D. Justice / 3. Punishment / b. Retribution for crime

1658	In early Greece the word for punishment was also the word for vengeance [Vlastos]