Weak solutions

There are many results involving PDEs in fluid mechanics with delays and many results about asymptotic behavior to PDEs. Navier-Stokes equations with delays have been studied extensively over the last decades, for their important contributions to understanding fluid motion and turbulence.

8p vijiraiya 19-05-2025 1 1   Download

The article uses qualitative research methods to analyze the potential, strengths, weaknesses, opportunities and challenges to develop community tourism. To develop community tourism, close coordination between local authorities, tourism businesses, local communities and tourists is needed. Synchronously implement several solutions to sustainably developing community tourism in the Mekong Delta.

12p visarada 28-04-2025 1 1   Download

This study explores the potential and challenges of eco-tourism development in Can Tho City, Vietnam, a region rich in natural and cultural resources. Employing SWOT analysis, the research identifies key strengths, weaknesses, opportunities, and threats to sustainable eco-tourism development.

11p viaburame 14-03-2025 7 0   Download

In this paper, we have investigated the non-existence of positive solutions to the functional inequality involving the Laplace operator of order m on the punctured ball in Rn, where n > 2m ≥ 4.

6p vibenya 31-12-2024 5 2   Download

The thesis researches to clarify the rationale of innovating theoretical education methods for students of universities in our country, on that basis, surveying the situation, proposing a number of master views and solutions. weak to innovate the method of political theoretical education for students of universities in the midland and mountainous areas of our country today.

26p lequangvinh1608 13-08-2019 74 4   Download

Research optimality conditions for local weak efficient solution in vector equilibrium problem involving set, inequality and equality constraints with stable functions via contingent derivatives in finite-dimensional spaces. Research optimality conditions for weak, Henig, global and superefficient solutions in vector equilibrium problems with steady. Research second order optimality conditions for weak, Henig, global, super-efficient solutions in vector equilibrium problems with arbitrary functions in terms of contingent epiderivatives in Banach spaces.

26p xacxuoc4321 11-07-2019 18 5   Download

This article aims to introduce some methods to improve basic IT skills for the student of FLF along with the Technical English vocabulary for FLF studens, base on knowledge from the IT community along with personal experience. By the way of analyzing the strengths and weaknesses of Faculty Language Foreign students at present My research will outlined some general informations which are shortcomings of the IT skills for FLF student. Moreover this research will highlight the importance of Technical English knowledge.

49p dat2812 27-07-2017 69 8   Download

Purposes of the Thesis is to clarify theories and practices on attracting and retaining the talented people; propose measures and solutions for attracting and retaining talented people in the public administrative agencies in Vietnam.

25p change08 27-06-2016 59 5   Download

The solution structure of three small serine proteinase inhibitors, two natural and one engineered protein, SGCI (Schistocerca gregaria chymotrypsin inhibitor), SGCI[L30R, K31M] and SGTI (Schistocerca gregaria trypsin inhibitor), were determined by homonuclear NMR-spectroscopy. The molecules exhibit di€erent speci®cities towards target proteinases, where SGCI is a good chymo-trypsin inhibitor, itsmutant is apotent trypsin inhibitor, and SGTI inhibits both proteinases weakly.

11p research12 23-04-2013 37 3   Download

We study enhancement of diffusive mixing on a compact Riemannian manifold by a fast incompressible flow. Our main result is a sharp description of the class of flows that make the deviation of the solution from its average arbitrarily small in an arbitrarily short time, provided that the flow amplitude is large enough. The necessary and sufficient condition on such flows is expressed naturally in terms of the spectral properties of the dynamical system associated with the flow. In particular, we find that weakly mixing flows always enhance dissipation in this sense. ...

33p dontetvui 17-01-2013 52 10   Download

EXISTENCE AND MULTIPLICITY OF WEAK SOLUTIONS FOR A CLASS OF DEGENERATE NONLINEAR ELLIPTIC EQUATIONS ˘ MIHAI MIHAILESCU Received 11 January 2005; Revised 4 July 2005; Accepted 17 July 2005 The goal of this paper is to study the existence and the multiplicity of non-trivial weak solutions for some degenerate nonlinear elliptic equations on the whole space RN . The solutions will be obtained in a subspace of the Sobolev space W 1,p (RN ). The proofs rely essentially on the Mountain Pass theorem and on Ekeland’s Variational principle. Copyright © 2006 Mihai Mih˘ ilescu.

17p sting12 10-03-2012 57 4   Download

MONOTONE ITERATIVE TECHNIQUE FOR SEMILINEAR ELLIPTIC SYSTEMS A. S. VATSALA AND JIE YANG Received 27 September 2004 and in revised form 23 January 2005 We develop monotone iterative technique for a system of semilinear elliptic boundary value problems when the forcing function is the sum of Caratheodory functions which are nondecreasing and nonincreasing, respectively. The splitting of the forcing function leads to four different types of coupled weak upper and lower solutions. In this paper, relative to two of these coupled upper and lower solutions, we develop monotone iterative technique.

14p sting12 10-03-2012 47 4   Download

ON DELAY DIFFERENTIAL EQUATIONS WITH NONLINEAR BOUNDARY CONDITIONS TADEUSZ JANKOWSKI Received 21 July 2004 The monotone iterative method is used to obtain sufficient conditions which guarantee that a delay differential equation with a nonlinear boundary condition has quasisolutions, extremal solutions, or a unique solution. Such results are obtained using techniques of weakly coupled lower and upper solutions or lower and upper solutions. Corresponding results are also obtained for such problems with more delayed arguments.

14p sting12 10-03-2012 41 6   Download

MULTIPLICITY RESULTS FOR A CLASS OF ASYMMETRIC WEAKLY COUPLED SYSTEMS OF SECOND-ORDER ORDINARY DIFFERENTIAL EQUATIONS FRANCESCA DALBONO AND P. J. MCKENNA Received 1 November 2004 We prove the existence and multiplicity of solutions to a two-point boundary value problem associated to a weakly coupled system of asymmetric second-order equations. Applying a classical change of variables, we transform the initial problem into an equivalent problem whose solutions can be characterized by their nodal properties.

23p sting12 10-03-2012 42 7   Download

BOUNDARY VALUE PROBLEMS FOR THE 2ND-ORDER SEIBERG-WITTEN EQUATIONS CELSO MELCHIADES DORIA Received 8 June 2004 It is shown that the nonhomogeneous Dirichlet and Neuman problems for the 2nd-order Seiberg-Witten equation on a compact 4-manifold X admit a regular solution once the nonhomogeneous Palais-Smale condition is satisfied. The approach consists in applying the elliptic techniques to the variational setting of the Seiberg-Witten equation. The gauge invariance of the functional allows to restrict the problem to the Coulomb subspace C of configuration space.

19p sting12 10-03-2012 44 5   Download

ON WEAK SOLUTIONS OF THE EQUATIONS OF MOTION OF A VISCOELASTIC MEDIUM WITH VARIABLE BOUNDARY V. G. ZVYAGIN AND V. P. ORLOV Received 2 September 2005 The regularized system of equations for one model of a viscoelastic medium with memory along trajectories of the field of velocities is under consideration. The case of a changing domain is studied. We investigate the weak solvability of an initial boundary value problem for this system. 1. Introduction The purpose of the present paper is an extension of the result of [21] on the case of a changing domain. Let Ωt ∈ Rn , 2 ≤...

31p sting12 10-03-2012 43 6   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: POSITIVE SOLUTIONS OF SOME THREE-POINT BOUNDARY VALUE PROBLEMS VIA FIXED POINT INDEX FOR WEAKLY INWARD A-PROPER MAPS

8p sting11 10-03-2012 57 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: BOUNDARY REGULARITY OF WEAK SOLUTIONS TO NONLINEAR ELLIPTIC OBSTACLE PROBLEMS

15p dauphong18 09-03-2012 37 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Almost-Periodic Weak Solutions of Second-Order Neutral Delay-Differential Equations with Piecewise Constant Argument

11p sting10 29-02-2012 41 5   Download