In this article,we prove that viscosity solutions of the parabolic inhomogeneous equations can be characterized using asymptotic mean value properties for all p ≥ 1,including p = 1and p = ∞.We also obtain a comparison principle for the non-negative or non-positive inhomogeneous term / for the corresponding initial-boundary value problem and this in turn implies the uniqueness of solutions to such a problem.
In this paper we consider the initial boundary value problem of a hyperbolic-parabolic type system for image inpainting in a 2-D bounded domain,and establish the existence of weak solutions to the system by employing the method of vanishing viscosity.
This paper is devoted to investigating the asymptotic properties of the renormalized solution to the viscosity equation tfε + v ·▽xfε = Q (fε,fε ) + εΔvfε as ε→ 0+ . We deduce that the renormalized solution of the viscosity equation approaches to the one of the Boltzmann equation in L1 ((0 , T ) × RN × RN ). The proof is based on compactness analysis and velocity averaging theory.
This paper concerns the weak solutions of some Monge-Ampère type equations in the optimal transportation theory.The relationship between the Aleksandrov solutions and the viscosity solutions of the Monge-Ampère type equations is discussed.A uniform estimate for solution of the Dirichlet problem with homogeneous boundary value is obtained.
We discuss the relationship between the frequency and the growth of H-harmonic functions on the Heisenberg group.Precisely,we prove that an H-harmonic function must be a polynomial if its frequency is globally bounded.Moreover,we show that a class of H-harmonic functions are homogeneous polynomials provided that the frequency of such a function is equal to some constant.
In this paper, the classical Ambarzumyan’s theorem for the regular SturmLiouville problem is extended to the case in which the boundary conditions are eigenparameter dependent. Specifically, we show that if the spectrum of the operator D 2 +q with eigenparameter dependent boundary conditions is the same as the spectrum belonging to the zero potential, then the potential function q is actually zero.
