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It is well-known that a stochastic differential equation (sde) on a Euclidean space driven by a (possibly infinite-dimensional) Brownian motion with Lipschitz coefficients generates a stochastic flow of homeomorphisms. If the Lipschitz…

概率论 · 数学 2016-03-23 Michael Scheutzow , Susanne Schulze

We formulate a Calabi-Yau type conjecture in generalized K\"ahler geometry, focusing on the case of nondegenerate Poisson structure. After defining natural Hamiltonian deformation spaces for generalized K\"ahler structures generalizing the…

微分几何 · 数学 2021-03-15 Vestislav Apostolov , Jeffrey Streets

We probe the existence of supersymmetric vacua of the type IIB orientifold of the elliptic Calabi-Yau space P_{11169}[18] where generically two complex structure moduli z_i, the dilaton tau and the two K\"ahler moduli T_i are stabilized by…

高能物理 - 理论 · 物理学 2008-11-26 Gottfried Curio , Vera Spillner

We study the integrability of the conformal geodesic flow (also known as the conformal circle flow) on the $SO(3)$--invariant gravitational instantons. On a hyper--K\"ahler four--manifold the conformal geodesic equations reduce to geodesic…

微分几何 · 数学 2021-05-18 Maciej Dunajski , Paul Tod

Solitons are important nonperturbative excitations in superfluids. For holographic superfluids, we numerically construct dark solitons that have the symmetry-restored phase at their core. A central point is that we include the gravitational…

高能物理 - 理论 · 物理学 2020-04-15 Zhongshan Xu , Yiqiang Du , Johanna Erdmenger , René Meyer , Yu Tian , Zhuo-Yu Xian

In this paper we expand on the work of the first author on ambient obstruction solitons, which are self-similar solutions to the ambient obstruction flow. Our main result is to show that any closed ambient obstruction soliton is ambient…

微分几何 · 数学 2024-05-28 Erin Griffin , Rahul Poddar , Ramesh Sharma , William Wylie

We explicitly construct soliton solutions in the low energy description of M-theory on S^1/Z_2. It is shown that the 11-dimensional membrane is a BPS solution of this theory if stretched between the Z_2 hyperplanes. A similar statement…

高能物理 - 理论 · 物理学 2009-10-30 Zygmunt Lalak , Andre' Lukas , Burt A. Ovrut

We analyze in detail the description of type IIB theory on a Calabi-Yau three-fold near a conifold singularity in terms of intersecting D-branes. In particular we study the singularity structure of higher derivative $F$-terms of the form…

高能物理 - 理论 · 物理学 2009-10-30 E. Gava , T. Jayaraman , K. S. Narain , M. H. Sarmadi

This paper investigates curve flows on the light-cone in the 3-dimensional Minkowski space. We derive the Harnack inequality for the heat flow and present a detailed classification of space-periodic solitons for a third-order curvature…

微分几何 · 数学 2025-02-11 Yun Yang

This work introduces the G$_2$-Ricci flow on seven-dimensional manifolds with non-zero torsion and explores its physical implications. By extending the Ricci flow to manifolds with G$_2$ structures, we study the evolution of solitonic…

综合物理 · 物理学 2025-06-11 Richard Pinčák , Alexander Pigazzini , Michal Pudlák , Erik Bartoš

We investigate the Couette-Taylor problem for a steady incompressible viscous fluid in a 3D cylindrical annulus, where one of the two cylinders is still, under both Dirichlet and boundary conditions involving the vorticity that naturally…

偏微分方程分析 · 数学 2026-03-06 Edoardo Bocchi , Filippo Gazzola , Antonio Hidalgo-Torné

We are interested in the nonlinear damped Klein-Gordon equation \[ \partial_t^2 u+2\alpha \partial_t u-\Delta u+u-|u|^{p-1}u=0 \] on $\mathbb{R}^d$ for $2\le d\le 5$ and energy sub-critical exponents $2 < p < \frac{d+2}{d-2}$. We construct…

偏微分方程分析 · 数学 2024-11-19 Raphaël Côte , Haiming Du

In this paper, we consider the Laplacian G_2 flow on a closed seven-dimensional manifold M with a closed G_2-structure. We first obtain the gradient estimates of positive solutions of the heat equation under the Laplacian G_2 flow and then…

微分几何 · 数学 2025-03-26 Chuanhuan Li , Yi Li , Kairui Xu

We give a classification of compact solitons for the pluriclosed flow on complex surfaces. First, by exploiting results from the Kodaira classification of surfaces, we show that the complex surface underlying a soliton must be K\"ahler…

微分几何 · 数学 2018-02-02 Jeffrey Streets

Point vortex models are presented for the generalized Euler equations, which are characterized by a fractional Laplacian relation between the active scalar and the streamfunction. Special focus is given to the case of the surface…

大气与海洋物理 · 物理学 2018-09-19 Gualtiero Badin , Anna M. Barry

Properties of Hamiltonian symmetry flows on hyperbolic Euler-type Liouvillean equations E' are analyzed. Description of their Noether symmetries assigned to the integrals for these equations is obtained. The integrals provide Miura…

可精确求解与可积系统 · 物理学 2009-11-10 A. V. Kiselev

A geometric flow on $6$-dimensional symplectic manifolds is introduced which is motivated by supersymmetric compactifications of the Type IIA string. The underlying structure turns out to be SU(3) holonomy, but with respect to the projected…

微分几何 · 数学 2020-11-10 Teng Fei , Duong H. Phong , Sebastien Picard , Xiangwen Zhang

We study solutions to the inverse mean curvature flow which evolve by homotheties of a given submanifold with arbitrary dimension and codimension. We first show that the closed ones are necessarily spherical minimal immersions and so we…

微分几何 · 数学 2018-02-12 Ildefonso Castro , Ana M. Lerma

The main aim of this paper is to discuss recent results on the adaptation of the Fokas-Gel'fand procedure for constructing soliton surfaces in Lie algebras, which was originally derived for PDEs [Grundland, Post 2011], to the case of…

数学物理 · 物理学 2015-06-03 A. M. Grundland , S. Post

We consider the Hamiltonian flow on complex complete intersection surfaces with isolated singularities, equipped with the Jacobian Poisson structure. More generally we consider complete intersections of arbitrary dimension equipped with…

辛几何 · 数学 2016-06-27 Pavel Etingof , Travis Schedler