Almgren's Three-Legged Starfish
Almgren's Three-Legged Starfish
In this note we use classical tools from min-max and hyperbolic geometry to substantiate a folklore example in Almgren--Pitts min-max theory, the three-legged starfish metric on a 2-sphere, whose systolic length, Almgren--Pitts width, and Gromov--Guth width are attained by ``figure-eight'' geodesics. We also recover a hyperbolic geometry fact about ``figure-eight'' geodesics using min-max.
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.Almgren's Three-Legged Starfish[EB/OL].(2025-04-29)[2025-05-11].https://arxiv.org/abs/2504.20895.点此复制
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