具有临界增长及Hardy项的半线性椭圆方程多解的存在性

该文研究如下问题{-△u+u/|x|~2=|u|~(2*-2)u+g(x),x∈R~N,u(x)→0(|x|→∞),u∈D~(1,2)(R~N)(0.1)多解的存在性,这里g(x)≥0,g(x)≠0,g(x)∈L~((2N)/(N+2))(R~N).证明了:存在常数C(适当小),如果‖g‖_(L(2N)/(N+2)(R~N))≤C,则上述问题至少有两个解存在.     

Morse指数与带权的椭圆方程的Liouville型定理

该文研究全空间R~N上带权的半线性椭圆型方程-△u=|x|~α|u|~(p-1)u,x∈R~N与半空间R_+~N={x∈R~N:x_N0}上带权的半线性椭圆型问题-△u=|x|~α|u|~(p-1)u,x∈R_+~N,u|?R_+~N=0的Liouville型定理,其中N≥3,α-2.证明了,当1p(N+2α+2)/(N-2)时,上述问题的Morse指数有限的有界解只能是零解.     

含参数拟线性非齐次椭圆型方程的多重解

该文研究如下形式的拟线性非齐次椭圆型方程-△_pu-△_p(|u|~(2α))|u|~(2α-2)u+V(x)|u|~(p-2)u=h(u)+g(x), x∈R~N,其中1 p≤N (N≥3),1/2 α≤1,V∈C(R~N,R), h∈C(R,R),而且扰动项g∈L~p'(R~N),这里p'=p/(p-1).利用变量代换结合极小极大方法可以证明该问题存在多重解.     

GROUND STATES FOR FRACTIONAL SCHR?DINGER EQUATIONS WITH ELECTROMAGNETIC FIELDS AND CRITICAL GROWTH

In this article, we study the following fractional Schr?dinger equation with electromagnetic fields and critical growth (-?)_A~su + V(x)u = |u|~(2_s~*-2) u + λf(x, |u|~2)u, x ∈ R~N,where(-?)_A~s is the fractional magnetic operator with 0 s 1, N 2s, λ 0, 2_s~*=2N/(N-2s),f is a continuous function, V ∈ C(R~N, R) and A ∈ C(R~N, R~N) are the electric and magnetic potentials, respectively. When V and f are asymptotically periodic in x, we prove that the equation has a ground state solution for large λ by Nehari method.     

一类分数阶基尔霍夫型方程解的多重性

本文运用临界点理论中的喷泉定理研究分数阶基尔霍夫型方程{M(∫_(R~N×R~N)|u(x)-u(y)|~2/|x-y|N=2sdxdy(-Δ)~su+H(∫_ΩF(X,U)dx)f(x,u),x∈Ωu=0,x∈R~N\Ω,其中N2s,s∈(0,1),Ω是R~N中具有局部Lipsshitz边界■Ω的有界开集,F(x,u)=∫_0~uf(x,σ)dσM(t):R~+→R~+,H(t):R→R为连续函数.在非线性项超线性增长且Ambrosetti-Rabinowitz超结性条件不满足的情形下,获得了新的多重解存在性结果.     

全空间上一类奇异p-Laplace方程无穷多解的存在性

本文研究了全空间上一类带奇异系数及其扰动的椭圆型p-Laplace问题-△_pu-μ(|u|~(p-2)u)/(|x|~p)=λ(u~(p*(t)-2))/(|x|~t)u+βf(x,u),x∈R~N,u∈D_0~(1,p)(R~N),其中N≥3,D_0~(1,p)(R~N)是C_0~∞(R~N)的闭包,△_pu=-div(|▽u|~(p-2)▽u),2pN,0≤μμ=((N-p)~p)/(p~p),λ0,0≤tp,p~*(t)=(p(N-t))/(N-p)是Hardy-Sobolev临界指数.利用集中紧原理和极大极小化的方法,得到了在一定条件下该问题无穷多解的存在性.     

Existence of Semiclassical States for a Quasilinear Schr?dinger Equation on R~N with Exponential Critical Growth

We study a quasilinear Schr?dinger equation{-ε~NΔNu+V(x)|u|~(N-2)u=Q(x)f(u) in R~N,0u∈W~(1,N)(R~N),u(x)|x|→∞→0,where V,Q are two continuous real functions on R~N and ε0 is a real parameter.Assume that the nonlinearity f is of exponential critical growth in the sense of Trudinger–Moser inequality,we are able to establish the existence and concentration of the semiclassical solutions by variational methods.     

带梯度项的半线性椭圆方程正整体解的存在性（英文）

本文应用上下解方法、摄动方法等,进一步推广了早期结果并给出半线性椭圆方程-△u+p(x)|▽u|~γ=λf(x,u),u0,x∈R~N,lim_(|x|→∞)u(x)=0,正解的存在性,其中γ∈(1,2],λ0,函数p:R~N→[0,∞)和f:R~N×(0,∞)→[0,∞)均为局部H(o|¨)lder连续.     

A positive solution of a nonlinear Schrdinger system with nonconstant potentials

In this paper, we study the existence of positive solutions to the following Schr¨odinger system:{-?u + V_1(x)u = μ_1(x)u~3+ β(x)v~2u, x ∈R~N,-?v + V_2(x)v = μ_2(x)v~3+ β(x)u~2v, x ∈R~N,u, v ∈H~1(R~N),where N = 1, 2, 3; V_1(x) and V_2(x) are positive and continuous, but may not be well-shaped; and μ_1(x), μ_2(x)and β(x) are continuous, but may not be positive or anti-well-shaped. We prove that the system has a positive solution when the coefficients Vi(x), μ_i(x)(i = 1, 2) and β(x) satisfy some additional conditions.     

一类分数阶椭圆方程解的渐近行为

应用Stampacchia方法,研究低阶项的正则化效应和Hardy位势对如下分数阶拉普拉斯方程解的渐近行为的影响{(-△)~su-λu/|x|~~(2s)+u~p=f(x),x∈Ω,u0,x∈Ω,u=0,x∈R~N\Ω,其中(-△)~s是分数阶Laplacian算子,s∈(0,1)且N 2s,ΩR~N是具有Lipschitz边界的有界光滑区域且0∈Ω.     

R~N上临界增长p-Kirchhoff型方程的非平凡解的存在性

本文主要研究以下具临界增长的非线性p-Kirchhoff型方程的非平凡解的存在性:{-(a+b∫_(R~N)|▽u|~p)?_pu=|u|~(p*-2)u+μf (x)|u|~(q-2)u, x∈R~N,(0.1) u∈D~(1,p)(R~N),其中a≥0,b0,1pN,1qp,p*=N_p/(N-p),μ≥0,?_pu=div(|▽u|~(p-2)▽u)表示p-Laplace算子对函数u的作用, f∈L(p*/(p*-q))(R~N)\{0}且f是非负的.本文利用Ekeland变分原理和山路定理证明方程(0.1)在适当条件下至少存在两个非平凡解.     

一类奇异拟线性椭圆方程正解的多重性

研究奇异拟线性椭圆型方程{-div(|x|~(-ap)|▽u|~(p-2)▽u) + f(x)|u|~(p-2) = g(x)\u|~(q-2)u + λh(x)|u|~(r-2),x R~N,u(x) 0,x∈ R~N,其中λ0是参数,1pN(N3),1rpgp*=0a(N—p)/p,p*=Np/{N~pd),aa+l,d=a+l-60,权函数f(x),g(x),h(x)满足一定的条件.利用山路引理和Ekeland变分原理证明了问题至少有两个非平凡的弱解.     

广义Choquard-Pekar方程两个非负解的存在性

运用集中紧致原理、变分方法以及局部极值方法,研究广义Choquard-Pekar方程-Δu+a(x)u=∫_(R~N)(Q(x,y)u~2(y)dy)/(|x|~h|x-y|~(r-2h)|y|~h)·u(x)+g(x),x∈R~N作者得到一定条件下这类问题的两个非负解的存在性.其中一个解是通过局部极小得到的,另一个是运用山路引理得到的.     

Least energy solutions of nonlinear Schr odinger equations involving the fractional Laplacian and potential wells

We are concerned with the existence of least energy solutions of nonlinear Schr¨odinger equations involving the fractional Laplacian(-?)~s u(x)+λV(x)u(x)=u(x)~(p-1),u(x)=0,x∈R~N,for sufficiently large λ,2p     

一类N维非线性波动方程的Cauchy问题

证明下列非线性波动方程的Cauchy问题v_(tt)-α△v_(tt)-Δv=g(v)-αΔg(v),x∈R~N,t>0,(1)v(x,0)=v_0(x),v_t(x,0)=v_1(x),x∈R~N(2)在空间C~2([0,∞);H~s(R~N))(s>N/2)中存在唯一整体广义解v和在空间C~2([0,∞);H~s(R~N))(s>2+N/2N)中存在唯一整体古典解v,即u∈C~2([0,∞);C_B~2(R~N)).还证明Cauchy问题(1),(2)在C~3([0,∞);W~(m,p)(R~N)∩L~∞(R~N))(m≥0,1≤p≤∞)中有唯一整体广义解v和在C~3([0,∞);W~(m,p)(R~N)∩L~∞(R~N))(m>2+N/P)中有唯一整体古典解v,即v∈C~3([0,∞);C~2(R~N)∩L~∞(R~N)).     

带有临界指标的周期Schrdinger方程的基态解

该文证明周期Schrdinger方程-△u+V(x)u=K(x)|u|~(2*-2)u+g(x,u),u∈H~1(R~N)基态解的存在性,其中N4,2~*=(2N)/(N-2)为临界Sobolev指标.该文补充了以上方程关于基态解存在性的以往结果.     

一类N-双调和方程多解的存在性

研究一类N-双调和方程△_N~2u-△_Nu+V(x)|u|~(N-2)u=f(x,u),x∈R~N其中f(x,u)=λg(x)|u|~(p-2)u+h(u),1pN,λ≥0是参数,权函数V(x),g(x),h(u)满足一定的条件.运用对称山路定理和Schwarz对称化方证明了方程存在无穷多个弱解.     

本刊英文版Vol.36(2020),No.4论文摘要（英文）

正A Weighted Trudinger-Moser Inequality on R~N and Its Application to Grushin Operator Jia Jun WANG Qiao Hua YANGAbstract Let x=(x′,x″) with x′∈R~k and x″∈R~(N-k)andΩbe a x′-symmetric and bounded domain in R~N (N≥2).We show that if 0≤a≤k-2,then there exists a positive constant C 0 such that for all x′-symmetric function u∈C_0~∞(Ω) with∫_Ω|▽u(x)|~(N-a)|x′|~(-a)dx≤1,the following uniform inequality holds     

带深井位势双调和方程的解

本文研究下述双调和方程极小能量解的存在性:?~2u+[λV (x)-δ]u=|u|_(p-2)u, x∈R~N,(0.1)其中N≥5,λ 0. p是次临界或临界的Sobolev指标,即2 p≤2**,这里2**=2N/N-4为临界的Sobolev指标, V (x)是非负连续的深井位势,其零集V~(-1)(0):={x∈R~N:V (x)=0}的内部int V~(-1)(0)是R~N中非空的有界光滑区域.令μ0为定义在int V~(-1)(0)中齐次边界条件下?~2的第一特征值.对任意的0 δμ0,本文证明:当λ 0充分大时,(0.1)存在一个在V~(-1)(0)附近的极小能量解.     

带梯度项的半线性椭圆方程整体解的存在性

By a sub-supersolution method and a perturbed argument,we show the existence of entire solutions for the semilinear elliptic problem-△u + a(x)|▽u|~q = λb(x)g(u),u 0,x ∈ R~N,lim(|x|→∞) u(x) = 0,where q ∈(1,2],λ 0,a and b are locally Holder continuous,a ≥0,b 0,(?)x∈ R~N,arid g ∈ C~1((0,∞),(0,∞)) which may be both possibly singular at zero and strongly unbounded at infinity.