Abstract Grassmannians or Grassmann manifolds are very important manifolds
in modern mathematics. They naturally appear in algebraic
topology, differential geometry, analysis, combinatorics,
mathematical physics, etc. Grassmannians have very rich
geometrical, combinatorial and topological structure, so
understanding them has been one of the central research themes in
mathematics. They occur in many important constructions such as
universal bundles, flag manifolds and others, hence studying their
properties and finding their topological and geometrical
invariants is still a very attractive question.
In this article we offer a quick introduction into the geometry of
Grassmannians suitable for readers without any previous exposure
to these concepts.
|