Real Analysis

Real analysis is the modern generalization of differential and integral calculus. This tag contains posts on calculus, measure theory, geometry and topology of Euclidean spaces.

A converse to Banach's fixed point theorem, due to Bessaga, is discussed.
Last updated on 5 min read expository

Expository note on the Runge phenomenon
Last updated on 1 min read expository

We describe a theorem due to Mihai Mariş concerning the symmetries of ground states.
Last updated on 13 min read expository