Combining Texts

Ideas for 'Set Theory and related topics (2nd ed)', 'Truth and Truthmakers' and 'Collins Dictionary of Philosophy'

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3 ideas

4. Formal Logic / F. Set Theory ST / 1. Set Theory

18396

The set theory brackets { } assert that the member is a unit [Armstrong]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

18393

For 'there is a class with no members' we don't need the null set as truthmaker [Armstrong]

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]