The Weil–Petersson gradient flow of renormalized volume and 3–dimensional convex cores

The Weil–Petersson gradient flow of renormalized volume and 3–dimensional convex cores
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Weil-Petersson 梯度流为

DOI:
10.2140/gt.2023.27.3183
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发表时间:
2020
期刊:
Geometry & Topology
影响因子:
--
通讯作者:
K. Bromberg
K. Bromberg
中科院分区:
--
文献类型:
--
作者:
M. Bridgeman;Jeffrey F. Brock;K. Bromberg

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本文利用重整化体积的Weil-Petersson梯度流研究了相对非圆柱三维流形$(N; S)$上的凸余紧双曲结构空间$CC(N;S,X)$.其中感兴趣的情况下是变形空间的acylinertium流形和Bers片的准Fuchsian空间相关联的一个固定的表面。为了处理退化的可能性沿着流线周边尖点结构,我们引入了一个外科手术的过程,以产生一个浪涌梯度流,限制在CC(N;S,X)的唯一结构$M_{\rm geod} \与全测地凸核心边界面临$S$。通过分析沿着流线的结构的几何形状,我们证明了如果$V_R(M)$是$M$的重整化体积,那么$V_R(M)-V_R(M_{\rm geod})$的下界是Weil-Petersson距离$d_{\rm WP}(\partial_c M,\partial_c M_{\rm geod})$的线性函数,常数只依赖于$S$的拓扑结构。Surgered流给出了一个统一的方法来研究双曲3-流形中的一些问题,提供了新的证明和推广著名的定理,如Storm的结果,$M_{\rm geod}$有最小体积为$N$acylinertium和第二作者的结果比较凸核体积和Weil-Petersson距离的拟fuchsian流形。
In this paper, we use the Weil-Petersson gradient flow for renormalized volume to study the space $CC(N;S,X)$ of convex cocompact hyperbolic structures on the relatively acylindrical 3-manifold $(N;S)$. Among the cases of interest are the deformation space of an acylindrical manifold and the Bers slice of quasi-Fuchsian space associated to a fixed surface. To treat the possibility of degeneration along flow-lines to peripherally cusped structures, we introduce a surgery procedure to yield a surgered gradient flow that limits to the unique structure $M_{\rm geod} \in CC(N;S,X)$ with totally geodesic convex core boundary facing $S$. Analyzing the geometry of structures along a flow line, we show that if $V_R(M)$ is the renormalized volume of $M$, then $V_R(M)-V_R(M_{\rm geod})$ is bounded below by a linear function of the Weil-Petersson distance $d_{\rm WP}(\partial_c M, \partial_c M_{\rm geod})$, with constants depending only on the topology of $S$. The surgered flow gives a unified approach to a number of problems in the study of hyperbolic 3-manifolds, providing new proofs and generalizations of well-known theorems such as Storm's result that $M_{\rm geod}$ has minimal volume for $N$ acylindrical and the second author's result comparing convex core volume and Weil-Petersson distance for quasifuchsian manifolds.
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发表时间: 2022
影响因子: 0.8
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影响因子: --
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影响因子: 2.5
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