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We consider the two-dimensional MHD Boundary layer system without hydrodynamic viscosity, and establish the existence and uniqueness of solutions in Sobolev spaces under the assumption that the tangential component of magnetic fields…

偏微分方程分析 · 数学 2021-06-04 Wei-Xi Li , Rui Xu

Differential equations with infinitely many derivatives, sometimes also referred to as ``nonlocal'' differential equations, appear frequently in branches of modern physics such as string theory, gravitation and cosmology. The goal of this…

数学物理 · 物理学 2014-03-05 Marcus Carlsson , Humberto Prado , Enrique G. Reyes

We continue our study on the global solution to the two-dimensional Prandtl's system for unsteady boundary layers in the class considered by Oleinik provided that the pressure is favorable. First, by using a different method from [13], we…

偏微分方程分析 · 数学 2022-05-04 Zhouping Xin , Liqun Zhang , Junning Zhao

In this paper, we delve into the fascinating realm of fractal calculus applied to fractal sets and fractal curves. Our study includes an exploration of the method analogues of the separable method and the integrating factor technique for…

综合数学 · 数学 2023-10-26 Alireza Khalili Golmankhaneh , Donatella Bongiorno

We consider the validity of Prandtl boundary layer expansion of solutions to the initial boundary value problem for inhomogeneous incompressible magnetohydrodynamics (MHD) equations in the half plane when both viscosity and resistivity…

偏微分方程分析 · 数学 2023-06-28 Li Shengxin , Xie Feng

We find a new class of data for which the Prandtl boundary layer equations and the hydrostatic Euler equations are locally in time well-posed. In the case of the Prandtl equations, we assume that the initial datum $u_0$ is monotone on a…

偏微分方程分析 · 数学 2014-02-11 Igor Kukavica , Nader Masmoudi , Vlad Vicol , Tak Kwong Wong

The aim of this paper is to study time-fractional pseudo-parabolic type equations generated by the Dunkl operator. The forward problem is considered and its well-posedness is established. In particular, a prior estimates are obtained in the…

偏微分方程分析 · 数学 2023-08-03 Bayan Bekbolat , Niyaz Tokmagambetov

In this paper presents the results obtained in the field of spectral theory operators of fractional differentiation. Proven a number of propositions which represents independent interest in the theory of fractional calculus. Introduced…

泛函分析 · 数学 2019-09-11 M. V. Kukushkin

In this paper, we consider the local well-posedness of the Prandtl boundary layer equations that describe the behavior of boundary layer in the small viscosity limit of the compressible isentropic Navier-Stokes equations with non-slip…

偏微分方程分析 · 数学 2014-07-15 Ya-Guang Wang , Feng Xie , Tong Yang

This paper concerns the validity of the Prandtl boundary layer theory for steady, incompressible Navier-Stokes flows over a rotating disk. We prove that the Navier Stokes flows can be decomposed into Euler and Prandtl flows in the inviscid…

偏微分方程分析 · 数学 2015-09-15 Sameer Iyer

The pendulum, in the presence of linear dissipation and a constant torque, is a non-integrable, nonlinear differential equation. In this paper, using the idea of rotated vector fields, derives the relation between the applied force $\beta$…

动力系统 · 数学 2012-05-15 Lian-Gang Li

We establish the well-posedness in Gevrey function space with optimal class of regularity 2 for the three dimensional Prandtl system without any structural assumption. The proof combines in a novel way a new cancellation in the system with…

偏微分方程分析 · 数学 2020-08-10 Wei-Xi Li , Nader Masmoudi , Tong Yang

We provide martingale analogs of weakly cancelling differential operators and prove a Sobolev-type embedding theorem for these operators in the martingale setting.

经典分析与常微分方程 · 数学 2019-09-04 Dmitriy Stolyarov

We study the well-posedness theory for the linearized free boundary problem of incompressible ideal magnetohydrodynamics equations in a bounded domain. We express the magnetic field in terms of the velocity field and the deformation tensors…

偏微分方程分析 · 数学 2021-08-27 Chengchun Hao , Tao Luo

The cancellation of perturbative contributions to the string tension in gluodynamics in the framework of vacuum field correlators method is shown at the order $O(g^4)$ by explicit calculation. The general pattern of these cancellations at…

高能物理 - 唯象学 · 物理学 2014-11-17 V. I. Shevchenko , Yu. A. Simonov

We demonstrate the existence of an open set of data which exhibits \textit{reversal} and \textit{recirculation} for the stationary Prandtl equations (data is taken in an appropriately defined product space due to the simultaneous forward…

偏微分方程分析 · 数学 2024-10-16 Sameer Iyer , Nader Masmoudi

During the process of teaching the concept of derivative, it is common and natural to refer to geometric interpretations, such as the use of the tangent line and the maximum and minimum points of a function, to illustrate the scope of the…

物理教育 · 物理学 2024-09-25 Mauricio López-Reyes

We consider the Prandtl boundary layer equations on the half plane, with initial datum that lies in a weighted $H^1$ space with respect to the normal variable, and is real-analytic with respect to the tangential variable. The boundary trace…

偏微分方程分析 · 数学 2016-03-23 Mihaela Ignatova , Vlad Vicol

This manuscript is a survey on results related to boundary layers and the vanishing viscosity limit for incompressible flow. It is the lecture notes for a 10 hour minicourse given at the Morningside Center, Academia Sinica, Beijing, PRC…

偏微分方程分析 · 数学 2007-12-07 Milton C. Lopes Filho

A cancellation is thought to be a basic process of the photospheric magnetic field and plays an important role in magnetic flux budget and in various solar activities. There are two major theoretical scenarios for this phenomena, i.e. the…

太阳与恒星天体物理 · 物理学 2010-02-24 Y. Iida , T. Yokoyama , K. Ichimoto