X-Nico

unusual facts about Geometry and topology


Geometry and topology

Differentiable manifolds (of a given dimension) are all locally diffeomorphic (by definition), so there are no local invariants to a differentiable structure (beyond dimension).



see also

Coarse space

Coarse structure, a family of sets in geometry and topology to measure large-scale properties of a space

Introduction to systolic geometry

Subsequently, Berger popularized the subject in a series of articles and books, most recently in the march '08 issue of the Notices of the American Mathematical Society. A bibliography at the Website for systolic geometry and topology currently contains over 170 articles.