## Duke Mathematical Journal

### Geometric branched covers between generalized manifolds

#### Abstract

We develop a theory of geometrically controlled branched covering maps between metric spaces that are generalized cohomology manifolds. Our notion extends that of maps of bounded length distortion, or BLD-maps, from Euclidean spaces. We give a construction that generalizes an extension theorem for branched covers by I. Berstein and A. Edmonds. We apply the theory and the construction to show that certain reasonable metric spaces that were shown by S. Semmes not to admit bi-Lipschitz parametrizations by a Euclidean space nevertheless admit BLD-maps into Euclidean space of same dimension.

#### Article information

Source
Duke Math. J., Volume 113, Number 3 (2002), 465-529.

Dates
First available in Project Euclid: 18 June 2004

https://projecteuclid.org/euclid.dmj/1087575315

Digital Object Identifier
doi:10.1215/S0012-7094-02-11333-7

Mathematical Reviews number (MathSciNet)
MR1909607

Zentralblatt MATH identifier
1017.30023

#### Citation

Heinonen, Juha; Rickman, Seppo. Geometric branched covers between generalized manifolds. Duke Math. J. 113 (2002), no. 3, 465--529. doi:10.1215/S0012-7094-02-11333-7. https://projecteuclid.org/euclid.dmj/1087575315

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