Pants decomposition filling-volume conjecture for embedded surfaces

Let KK) be a surface embedded in RN{\mathbb{R}}^N, of genus gg, and let γ1,,γ3g3\gamma_1,\dots,\gamma_{3g-3} be the boundary curves of a pants decomposition of KK. Here FV(γi)\operatorname{FV}(\gamma_i) denotes the filling volume of γi\gamma_i, and areaK\operatorname{area} K denotes the area of KK. Pants decomposition filling-volume conjecture. There is a pants decomposition such that

iFV(γi)areaK.\sum_i \operatorname{FV}(\gamma_i)\lesssim \operatorname{area} K.

The conjecture would give an alternative proof of the proposition that embedded surfaces admit efficient decompositions into simpler integral cycles. The implicit constant is independent of the genus; with genus-dependent constants, the claim follows from the systolic inequality for closed surfaces.

Sources & referencesView supporting material

Primary source

Robert Young, “Quantitative nonorientability of embedded cycles”, arXiv:1312.0966 (2016).

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