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Local characterization of polyhedral spaces

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Abstract

We show that a compact length space is polyhedral if a small spherical neighborhood of any point is conic.

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Notes

  1. It also follows that \(V_i\) forms a strongly convex subset of \(X\); i.e., any minimizing geodesic in \(X\) with ends in \(V_i\) lies completely in \(V_i\). This property is not needed in our proof, but it is used in the alternative proof; see the last section.

References

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Acknowledgments

We would like to thank Arseniy Akopyan, Vitali Kapovitch, Alexander Lytchak and Dmitri Panov for their help.

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Correspondence to Anton Petrunin.

Additional information

N. Lebedeva was partially supported by RFBR Grant 14-01-00062. A. Petrunin was partially supported by NSF Grant DMS 1309340.

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Lebedeva, N., Petrunin, A. Local characterization of polyhedral spaces. Geom Dedicata 179, 161–168 (2015). https://doi.org/10.1007/s10711-015-0072-x

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  • DOI: https://doi.org/10.1007/s10711-015-0072-x

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