Full Idea
It is generally accepted that mathematics reduces to set theory, and I argue that set theory in turn reduces, with some aid of mereology, to the theory of the singleton function.
Gist of Idea
Mathematics reduces to set theory, which reduces, with some mereology, to the singleton function
Source
David Lewis (Mathematics is Megethology [1993], p.03)
Book Reference
-: 'Philosophia Mathematica' [-], p.3