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Ideas for 'fragments/reports', 'Elucidation of some points in E.Schrder' and 'The Possibility of Metaphysics'

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3 ideas

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

8309	A set is a 'number of things', not a 'collection', because nothing actually collects the members [Lowe]

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

14238

A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege]

8322	I don't believe in the empty set, because (lacking members) it lacks identity-conditions [Lowe]