Regular embeddings of manifolds and topology of configuration spaces

Details Regular embeddings of manifolds and topology of configuration spaces Regular embeddings of manifolds and topology of configuration spaces

2010-06-03

arxiv.org/abs/1006.0613v3

Mathematics

Algebraic Topology

Scientific paper

For a topological space $X$ we study continuous maps $f : X\to \mathbb R^m$ such that images of every pairwise distinct $k$ points are affinely (linearly) independent. Such maps are called affinely (linearly) $k$-regular embeddings. We investigate the cohomology obstructions to existence of regular embeddings and give some new lower bounds on the dimension $m$ as function of $X$ and $k$, for the cases $X$ is $\mathbb R^n$ or $X$ is an $n$-dimensional manifold. In the latter case, some nonzero Stiefel--Whitney classes of $X$ help to improve the bound.

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