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Explicit formulae for homogenous Ricci solitons on three-dimensional Lorentzian Bianchi-Cartan-Vranceanu spaces are obtained.

Differential Geometry · Mathematics 2022-05-20 Murat Altunbaş

We describe the cone of Betti tables of all finitely generated graded modules over the homogeneous coordinate ring of three non-collinear points in the projective plane. We also describe the cone of Betti tables of all finite length…

Commutative Algebra · Mathematics 2016-11-21 Iulia Gheorghita , Steven V Sam

In this paper we prove that any asymptotically cylindrical gradient shrinking Ricci soliton is isometric to a cylinder.

Differential Geometry · Mathematics 2014-12-23 Giovanni Catino , Alix Deruelle , Lorenzo Mazzieri

In this paper, we analyze the asymptotic behavior of $\kappa$-noncollapsed and positively curved steady Ricci solitons and prove that any $n$-dimensional $\kappa$-noncollapsed steady K\"ahler-Ricci soliton with non-negative sectional…

Differential Geometry · Mathematics 2017-01-17 Yuxing Deng , Xiaohua Zhu

This paper studies a complete gradient Ricci soliton with an isoparametric potential function. Our first theorem asserts that, for the steady case, there is a critical level set of codimension greater than one. This is consistent with…

Differential Geometry · Mathematics 2026-01-23 Hung Tran , Kazuo Yamazaki

In this work, we have performed numerical simulations of the flapping motion of a rectangular wing in a three-dimensional flow field using the discrete vortex method (DVM). The DVM method is computationally more convenient because it does…

Fluid Dynamics · Physics 2023-09-28 Rahul Kumar , Srikant S. Padhee , Devranjan Samanta

The only known example of collapsed three-dimensional complete gradient steady Ricci solitons so far is the 3D cigar soliton $N^2\times \mathbb{R}$, the product of Hamilton's cigar soliton $N^2$ and the real line $\mathbb{R}$ with the…

Differential Geometry · Mathematics 2024-03-12 Huai-Dong Cao , Chenxu He

We prove that a finite type curve is an $\xi$-asymptotic line (without parabolic points) of a suitable plane field. It is also given an explicit example of a hyperbolic closed finite type $\xi$-asymptotic line. These results obtained here…

Differential Geometry · Mathematics 2019-08-12 Douglas H. da Cruz , Ronaldo A. Garcia

In this paper we prove that any $n$-dimensional ($n\ge 4$) complete Bach-flat gradient steady Ricci soliton with positive Ricci curvature is isometric to the Bryant soliton. We also show that a three-dimensional gradient steady Ricci…

Differential Geometry · Mathematics 2024-03-12 Huai-Dong Cao , Giovanni Catino , Qiang Chen , Carlo Mantegazza , Lorenzo Mazzieri

In theories where spacetime is a direct product of Minkowski space ($M^4$) and a d dimensional compact space ($K^d$), there can exist topological solitons that simultaneously wind around $R^3$ (or $R^2$ or $R^1$) in $M^4$ and the compact…

High Energy Physics - Theory · Physics 2011-02-09 C. S. Aulakh

In this paper, we investigate curvature pinching phenomena in complete non-compact asymptotically conical gradient expanding Ricci solitons and establish several Hamilton-Ivey type curvature pinching estimates. These results are parallel to…

Differential Geometry · Mathematics 2026-03-25 Huai-Dong Cao , Junming Xie

We introduce a novel type of surface waves that form at the edge of guiding structures consisting of several concentric rings. Such surface waves rotate steadily upon propagation and, in contrast to nonrotating waves, for high rotation…

Optics · Physics 2009-11-13 Yaroslav V. Kartashov , Victor A. Vysloukh , Lluis Torner

We establish the existence of an integer degree for the natural projection map from the space of parameterizations of asymptotically conical self-expanders to the space of parameterizations of the asymptotic cones when this map is proper.…

Differential Geometry · Mathematics 2018-07-18 Jacob Bernstein , Lu Wang

We describe the structure of the Ricci tensor on a locally homogeneous Lorentzian gradient Ricci soliton. In the non-steady case, we show the soliton is rigid in dimensions three and four. In the steady case, we give a complete…

Differential Geometry · Mathematics 2016-05-11 M. Brozos-Vázquez , E. García-Río , P. Gilkey , S. Gavino-Fernández

In this paper, we first show that a complete shrinking breather with Ricci curvature bounded from below must be a shrinking gradient Ricci soliton. This result has several applications. First, we can classify all complete $3$-dimensional…

Differential Geometry · Mathematics 2020-12-01 Liang Cheng , Yongjia Zhang

Convex hexagons that can tile the plane have been classified into three types. For the generic cases (not necessarily convex) of the three types and two other special cases, we classify tilings of the plane under the assumption that all…

Combinatorics · Mathematics 2024-05-09 Xinlu Yu , Erxiao Wang , Min Yan

In this note we prove that any four-dimensional half conformally flat gradient steady Ricci soliton must be either Bryant's soliton or Ricci flat. We also classify four-dimensional half conformally flat gradient shrinking Ricci solitons…

Differential Geometry · Mathematics 2011-02-08 Xiuxiong Chen , Yuanqi Wang

A new type of three-dimensional magnetic soliton in easy-axis ferromagnets is predicted by taking simultaneous account of the Dzyaloshinsky-Moriya interaction and an external magnetic field. The numerically obtained static three-dimensional…

Strongly Correlated Electrons · Physics 2011-08-23 A. B. Borisov , F. N. Rybakov

A $d$-dimensional simplex in Euclidean space is called orthocentric if all of its altitudes intersect at a single point, referred to as the orthocenter. We explicitly compute the internal and external angles at all faces of an orthocentric…

Metric Geometry · Mathematics 2025-05-09 Zakhar Kabluchko , Philipp Schange

We establish the short-time existence of the Ricci flow on surfaces with a finite number of conic points, all with cone angle between 0 and $2\pi$, where the cone angles remain fixed or change in some smooth prescribed way. For the…

Differential Geometry · Mathematics 2015-07-29 Rafe Mazzeo , Yanir A. Rubinstein , Natasa Sesum