Sharp geometric rigidity of isometries on Heisenberg groups

Details Sharp geometric rigidity of isometries on Heisenberg groups Sharp geometric rigidity of isometries on Heisenberg groups

2012-04-16

arxiv.org/abs/1204.3441v1

Mathematics

Metric Geometry

Scientific paper

We prove sharp geometric rigidity estimates for isometries on Heisenberg groups. Our main result asserts that every $(1+\varepsilon)$-quasi-isometry on a John domain of the Heisenberg group $\mathbb{H}^n$, $n>1$, is close to some isometry up to proximity order $\sqrt{\varepsilon}+\varepsilon$ in the uniform norm, and up to proximity order $\varepsilon$ in the $L_p^1$-norm. We give examples showing the asymptotic sharpness of our results.

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