The Theory of Forms
Book 13 of The Simplified Metaphysics by Aristotle
The Substance as Matter
Part 1
The Propositions of Mathematics
Part 3
The Theory of Ideas and Forms
Part 4
The Theory of Forms and Numbers
Part 5
Numbers are not Ideas
Part 7
Number and Unit
Part 8
Number and Unit
Part 9
The Individual and the Universal
Part 10