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On a question of Gromov about the Wirtinger inequalities

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Abstract

We prove that Gromov’s \(\mathrm {Cycl}_4(0)\) condition implies \(\mathrm {Wir}_k\) inequalities for any \(k \ge 4\), which answers a question of Gromov (J Math Sci N Y 119(2):178–200, 2004).

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References

  1. Ballmann, W.: Lectures on Spaces of Nonpositive Curvature. With an Appendix by Misha Brin. DMV Seminar, vol. 25. Birkhäuser, Basel (1995)

  2. Berg, I.D., Nikolaev, I.G.: Quasilinearization and curvature of Aleksandrov spaces. Geom. Dedicata 133, 195–218 (2008)

    Article  MathSciNet  MATH  Google Scholar 

  3. Bridson, M.R., Haefliger, A.: Metric Spaces of Non-positive Curvature. Grundlehren der Mathematischen Wissenschaften, vol. 319. Springer, Berlin (1999)

    Book  MATH  Google Scholar 

  4. Enflo, P.: On the nonexistence of uniform homeomorphisms between \(L_{p}\)-spaces. Ark. Mat. 8, 103–105 (1969)

    Article  MathSciNet  MATH  Google Scholar 

  5. Gerber, L.: Napoleons theorem and the parallelogram inequality for affine-regular polygons. Am. Math. Mon. 87(8), 644–648 (1980)

    Article  MathSciNet  MATH  Google Scholar 

  6. Gromov, M.: \({ \text{ CAT }}(\kappa )\)-spaces: construction and concentration. J. Math. Sci. N. Y. 119(2), 178–200 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  7. Jost, J.: Nonpositive Curvature: Geometric and Analytic Aspects. Lectures in Mathematics ETH Zürich. Birkhäuser, Basel (1997)

    Book  Google Scholar 

  8. Lafont, J., Prassidis, S.: Roundness properties of groups. Geom. Dedicata 117, 137–160 (2006)

    Article  MathSciNet  MATH  Google Scholar 

  9. Ohta, S.-I., Pichot, M.: A note on Markov type constants. Arch. Math. Basel 92(1), 80–88 (2009)

    Article  MathSciNet  MATH  Google Scholar 

  10. Pansu, P.: Superrigidité géométrique et applications harmoniques. Séminaires et Congrès 18, 373–420 (2009)

  11. Pech, P.: Inequality between sides and diagonals of a space \(n\)-gon and its integral analog. Časopis Pěst. Mat. 115(4), 343–350 (1990)

    MathSciNet  MATH  Google Scholar 

  12. Rešetnjak, J.G.: Non-expansive maps in a space of curvature no greater than \(K\). Sibirsk. Mat. Ž 9, 918–927 (1968). (Russian)

    MathSciNet  Google Scholar 

  13. Sato, T.: An alternative proof of Berg and Nikolaev’s characterization of \(\text{ CAT }(0)\)-spaces via quadrilateral inequality. Arch. Math. (Basel) 93(5), 487–490 (2009)

    Article  MathSciNet  MATH  Google Scholar 

  14. Schoenberg, I.J.: The finite Fourier series and elementary geometry. Am. Math. Mon. 57, 390–404 (1950)

  15. Sturm, K.-T.: Probability measures on metric spaces of nonpositive curvature. In: Heat Kernels and Analysis on Manifolds, Graphs, and Metric Spaces (Paris, 2002), Contemp. Math., vol. 338, pp. 357–390. American Mathematical Society, Providence, RI (2003)

  16. Vestfrid, I.A., Timan, A.F.: A universality property of Hilbert spaces. Dokl. Akad. Nauk SSSR 246(3), 528–530 (1979)

    MathSciNet  MATH  Google Scholar 

  17. Wells, J.H., Williams, L.R.: Embeddings and Extensions in Analysis. Ergebnisse der Mathematik und ihrer Grenzgebiete, Band 84. Springer, New York (1975)

    Book  Google Scholar 

  18. Zhan, X.: Matrix Theory. Graduate Studies in Mathematics, vol. 147. American Mathematical Society, Providence, RI (2013)

    Google Scholar 

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Acknowledgements

The first author would like to thank Professor Hiroyasu Izeki for valuable discussions.

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Correspondence to Tetsu Toyoda.

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Kondo, T., Toyoda, T. & Uehara, T. On a question of Gromov about the Wirtinger inequalities. Geom Dedicata 195, 203–214 (2018). https://doi.org/10.1007/s10711-017-0284-3

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  • DOI: https://doi.org/10.1007/s10711-017-0284-3

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