Mathematical Platonism

abstract object in mathematics

theory stating that external physical reality is a mathematical structure

Mathematicism is 'the effort to employ the formal structure and rigorous method of mathematics as a model for the conduct of philosophy', or the epistemological view that reality is fundamentally mathematical. The term has been applied to a number of philosophers, including Pythagoras and René Descartes although the term was not used by themselves.

popular science book by cosmologist Max Tegmark

branch of metaphysics regarding abstract objects

form of realism that suggests that mathematical entities are abstract, have no spatiotemporal or causal properties, and are eternal and unchanging