# Category theory

**Category theory** formalizes mathematical structure and its concepts in terms of a collection of *objects* and of *arrows* (also called morphisms).

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## Quotes[edit]

- Category theory plays somewhat the same role in algebra and topology that set theory plays in analysis.
*Homotopy Theory: An Introduction to Algebraic Topology*. Academic Press. 12 November 1975. p. 17. ISBN 978-0-08-087380-0.