Preprint
Aug 2026
Free boundary minimal annuli in convex balls
We construct a $4$-parameter family of properly embedded genus-zero surfaces with at most two boundary components in a Riemannian $3$-ball. The construction is a free boundary analog of the canonical $5$-parameter family of surfaces on the $3$-sphere by Marques-Neves in the proof of Willmore conjecture. In the Euclidea...
Dongyeong Ko, Guan-Hua Shao
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