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Rigidity of capillary surfaces in compact 3-manifolds with strictly convex boundary

Published online by Cambridge University Press:  03 April 2023

Paulo Alexandre Sousa
Affiliation:
Departamento de Matemática, Universidade Federal do Piauí, Ininga - Teresina - PI 64049-550, Brazil (paulosousa@ufpi.edu.br; rmarcolino@ufpi.edu.br; barnabe@ufpi.edu.br; bruno_vmv@ufpi.edu.br)
Rondinelle Marcolino Batista
Affiliation:
Departamento de Matemática, Universidade Federal do Piauí, Ininga - Teresina - PI 64049-550, Brazil (paulosousa@ufpi.edu.br; rmarcolino@ufpi.edu.br; barnabe@ufpi.edu.br; bruno_vmv@ufpi.edu.br)
Barnabé Pessoa Lima
Affiliation:
Departamento de Matemática, Universidade Federal do Piauí, Ininga - Teresina - PI 64049-550, Brazil (paulosousa@ufpi.edu.br; rmarcolino@ufpi.edu.br; barnabe@ufpi.edu.br; bruno_vmv@ufpi.edu.br)
Bruno Vasconcelos Mendes Vieira
Affiliation:
Departamento de Matemática, Universidade Federal do Piauí, Ininga - Teresina - PI 64049-550, Brazil (paulosousa@ufpi.edu.br; rmarcolino@ufpi.edu.br; barnabe@ufpi.edu.br; bruno_vmv@ufpi.edu.br)

Abstract

In this paper, we obtain one sharp estimate for the length $L(\partial\Sigma)$ of the boundary $\partial\Sigma$ of a capillary minimal surface Σ2 in M3, where M is a compact three-manifolds with strictly convex boundary, assuming Σ has index one. The estimate is in term of the genus of Σ, the number of connected components of $\partial\Sigma$ and the constant contact angle θ. Making an extra assumption on the geometry of M along $\partial M$, we characterize the global geometry of M, which is saturated only by the Euclidean three-balls. For capillary stable CMC surfaces, we also obtain similar results.

Type
Research Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press on Behalf of The Edinburgh Mathematical Society.

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