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In this paper, we derive the first variation formulas for surfaces in 3-dimensional Euclidean space by using the ``strain-displacement relations'' known in thin shell theory. For applications to architectural surface design, we focus on the…

Differential Geometry · Mathematics 2024-03-26 Yoshiki Jikumaru

In a previous article we studied PGL(n,C)-representations of a 3-manifold via a generalization of Thurston's gluing equations. Neumann has proved some symplectic properties of Thurston's gluing equations that play an important role in…

Geometric Topology · Mathematics 2016-11-07 Stavros Garoufalidis , Christian K. Zickert

Following Matveev, a k-normal surface in a triangulated 3-manifold is a generalization of both normal and (octagonal) almost normal surfaces. Using spines, complexity, and Turaev-Viro invariants of 3-manifolds, we prove the following…

Geometric Topology · Mathematics 2011-05-13 Evgeny Fominykh , Bruno Martelli

In a previous paper, we parametrized boundary-unipotent representations of a 3-manifold group into SL(n,C) using Ptolemy coordinates, which were inspired by A-coordinates on higher Teichm\"uller space due to Fock and Goncharov. In this…

Geometric Topology · Mathematics 2015-07-17 Stavros Garoufalidis , Matthias Goerner , Christian K. Zickert

The goal of this article is to establish estimates involving the Yamabe minimal volume, mixed minimal volume and some topological invariants on compact 4-manifolds. In addition, we provide topological sphere theorems for compact…

Differential Geometry · Mathematics 2018-10-09 E. Costa , E. Ribeiro

This paper concerns the construction and analysis of a numerical scheme for a mixed discrete-continuous fragmentation equation. A finite volume scheme is developed, based on a conservative formulation of a truncated version of the…

Numerical Analysis · Mathematics 2019-02-06 Graham Baird , Endre Süli

For any closed orientable 3-manifold, there is a volume function defined on the space of all Seifert representations of the fundamental group. The maximum absolute value of this function agrees with the Seifert volume of the manifold due to…

Geometric Topology · Mathematics 2024-03-06 Pierre Derbez , Yi Liu , Shicheng Wang

The paper is centered around a new proof of the infinitesimal rigidity of convex polyhedra. The proof is based on studying derivatives of the discrete Hilbert-Einstein functional on the space of "warped polyhedra" with a fixed metric on the…

Differential Geometry · Mathematics 2011-05-26 Ivan Izmestiev

Krasnov (arXiv: hep-th/0005106) identified the renormalized volume of a Schottky 3-manifold with the action of the Liouville theory on the conformal infiinity. We try to compute the renormalized volume in terms of more transparent geometric…

Differential Geometry · Mathematics 2007-05-23 Xiaodong Wang

We explore a connection between the Finslerian area functional based on the Busemann-Hausdorff-volume form, and well-investigated Cartan functionals to solve Plateau's problem in Finsler 3-space, and prove higher regularity of solutions.…

Differential Geometry · Mathematics 2014-01-29 Patrick Overath , Heiko von der Mosel

We introduce a scalar invariant on manifolds with density which is analogous to the renormalized volume coefficient $v_3$ in conformal geometry. We show that this invariant is variational and that shrinking gradient Ricci solitons are…

Differential Geometry · Mathematics 2016-03-10 Jeffrey S. Case

Solving difficult mixed-integer nonlinear programs via spatial branch-and-bound requires effective convex outer-approximations of nonconvex sets. In this framework, complex problem formulations are decomposed into simpler library functions,…

Optimization and Control · Mathematics 2025-12-17 Lillian Makhoul , Emily Speakman

In the generalized topological quantum field theory constructed by Andersen and Kashaev, invariants of 3-manifolds are defined given the combinatorial structure of a tetrahedral decomposition. Furthermore, a variant of the volume conjecture…

Geometric Topology · Mathematics 2023-07-25 Soichiro Uemura

We investigate the performance of the finite volume method in solving viscoplastic flows. The creeping square lid-driven cavity flow of a Bingham plastic is chosen as the test case and the constitutive equation is regularised as proposed by…

Computational Physics · Physics 2016-04-29 Alexandros Syrakos , Georgios C. Georgiou , Andreas N. Alexandrou

We clearly refine the fundamental framework of the thin-layer quantization procedure, and further develop the procedure by taking the proper terms of degree one in $q_3$ ($q_3$ denotes the curvilinear coordinate variable perpendicular to…

Quantum Physics · Physics 2015-11-30 Yong-Long Wang , Hong-Shi Zong

We give a Chern-Simons based proof of Tholozan's volume formula for closed anti-de-Sitter 3-manifolds.

Differential Geometry · Mathematics 2023-11-08 François Labourie

We obtain upper and lower bounds on the difference between the renormalized volume and the volume of the convex core of a convex cocompact hyperbolic 3-manifold which depend on the injectivity radius of the boundary of the universal cover…

Differential Geometry · Mathematics 2017-07-10 Martin Bridgeman , Richard Canary

We show that the simplicial volume of a contractible 3-manifold not homeomorphic to $\mathbb{R}^3$ is infinite. As a consequence, the Euclidean space may be characterized as the unique contractible $3$-manifold with vanishing minimal…

Geometric Topology · Mathematics 2021-05-20 Giuseppe Bargagnati , Roberto Frigerio

We study invariant manifolds of measure-valued solutions of the partial differential equation for geodesic flow of a pressureless fluid. These solutions describe interaction dynamics on lower-dimensional support sets; for example, curves,…

Exactly Solvable and Integrable Systems · Physics 2009-11-10 Darryl D. Holm , Vakhtang Putkaradze , Samuel N. Stechmann

We prove entropy rigidity for finite volume strictly convex projective manifolds in dimensions $\geq 3$, generalizing the work of arXiv:1708.03983 to the finite volume setting. The rigidity theorem uses the techniques of Besson, Courtois,…

Differential Geometry · Mathematics 2020-06-25 Harrison Bray , David Constantine
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