Combining Philosophers

All the ideas for Karl Weierstrass, Hugh MacColl and Frances A. Yates

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5 ideas

1. Philosophy / B. History of Ideas / 4. Early European Thought

9288	The magic of Asclepius enters Renaissance thought mixed into Ficino's neo-platonism [Yates]

9291	The dating, in 1614, of the Hermetic writings as post-Christian is the end of the Renaissance [Yates]

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

21548

The null class is the class with all the non-existents as its members [MacColl, by Lackey]

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

18086

Weierstrass eliminated talk of infinitesimals [Weierstrass, by Kitcher]

6. Mathematics / A. Nature of Mathematics / 5. The Infinite / l. Limits

18092

Weierstrass made limits central, but the existence of limits still needed to be proved [Weierstrass, by Bostock]