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On totally umbilical and minimal surfaces of the Lorentzian Heisenberg groups

Author

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  • Giovanni Calvaruso
  • Marco Castrillón‐Lopez
  • Lorenzo Pellegrino

Abstract

This paper has manifold purposes. We first introduce a description of the Gauss map for submanifolds (both spacelike and timelike) of a Lorentzian ambient space and relate the conformality of the Gauss map of a surface to total umbilicity and minimality. We then focus on surfaces of the three‐dimensional Heisenberg group, equipped with any of its left‐invariant Lorentzian metrics. We prove that with the obvious exception of the flat case, no totally umbilical surfaces occur. On the other hand, we determine and explicitly describe several examples of minimal and constant mean curvature (CMC) surfaces.

Suggested Citation

  • Giovanni Calvaruso & Marco Castrillón‐Lopez & Lorenzo Pellegrino, 2025. "On totally umbilical and minimal surfaces of the Lorentzian Heisenberg groups," Mathematische Nachrichten, Wiley Blackwell, vol. 298(6), pages 1922-1942, June.
    • Handle: RePEc:bla:mathna:v:298:y:2025:i:6:p:1922-1942
    DOI: 10.1002/mana.12020
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