Deterministic homogenization of nonlinear degenerate elliptic operators with nonstandard growth

We study the deterministic homogenization of nonlinear degenerate elliptic equations with nonstandard growth.One fundamental in this topic is to extend the classical compactness results of theΣ-convergence method to the Orlicz spaces.We also show that one can homogenize nonlinear Dirichlet problems in a general way by leaning on a simple abstract hypothesis contrary to what has been done in the determinstic homogenization theory.     

Weak convergence theorems for strict pseudo-contractions in Banach spaces

In this paper, it is shown that there is a gap in the paper [Chidume, C. E., Shahzad, N.: Weak convergence theorems for a finite family of strict pseudo-contractions. Nonlinear Anal., 72, 1257–1265(2010)], consequently, the main results of the paper do not hold in uniformly smooth Banach spaces. Meanwhile, it is also shown that the main results(Lemma 3.4, Theorems 3.5–3.6, 3.8–3.9) in the paper [Cholamjiak, P., Suantai, S.: Weak convergence theorems for a countable family of strict pseudo-contractions in Banach spaces. Fixed Point Theory Appl., 2010, Article ID 632137, 16 pages(2010)] do not hold in Lpfor p 3. Finally, some modified results are presented in the setting of uniformly smooth and uniformly convex Banach spaces which include Lpfor p ≥ 2 as special cases. Furthermore, our arguments are also different from the ones given by the authors above.     

一类弱耗散双组份Hunter-Saxton系统的爆破与爆破率

研究了一类周期弱耗散双组份Hunnter-Saxton系统的爆破现象.首先,给出了此类Hunnter-Saxton系统解的局部适定性及其精确的爆破机制;其次,证明了在一定的初始值下Hunnter-Saxton系统强解的几个爆破结果;最后,给出了HunnterSaxton系统强解的爆破率.     

一般迁移方程相应余项的弱紧性及其应用

在L¹空间,研究了板几何中一类具周期边界条件的各向异性、连续能量、均匀介质的迁移方程.通过构造算子,利用比较算子方法,证明了该迁移算子A相应的迁移半群V(t)(t≥0)的Dyson-Phillips展开式的伽阶余项R_n(t)(n≥1)的弱紧性,得到了半群V(t)与U(t)(streaming算子B产生)本质谱相同,本质谱型一致;迁移算子A的谱在区域Γ中由有限个具有限代数重数的离散本征值组成;迁移方程解的渐近稳定性.     

Banach空间中关于增生算子的强收敛迭代序列

主要研究求解增生算子零点问题的一类算法:x_(n+1)=α_nu+(1-α_n)((1-λ)x_n+λJ_r_nx_n),其u是固定向量,λ∈(0,1),{r_n}和{α_n}是实数列,J_r_n表示增生算子A的预解式.其中(r_n)收敛是保证算法收敛的一个充分条件,该文主要证明了此条件可减弱为limn|1-(r_n+1)/r_n|=0.     

具有正边界值的一类退化抛物方程组解的爆破与全局有界

该文研究具有正边界值条件的一类非局部退化抛物型方程组.借助于上下解方法和分段函数,获得了方程组解的全局有界与爆破准则.结果表明,正的边界值ε_0在确定方程组解的爆破中起着关键的作用.     

含超临界指数的p&q-拉普拉斯方程的多重解

证明了如下含超临界指数的pq-拉普拉斯方程-△_pu-△_qu+|u|~(r-2)u=γ|u|~(s-2)u,x∈Ω,u=0,x∈Ω,满足一定假设下,存在无穷多弱解.     

FC-空间中新的连续选择定理及其对广义模糊约束多目标对策的应用

建立了非紧FC-空间中新的连续选择定理,作为应用,获得了非紧FC-空间中广义模糊约束多目标对策的弱Pareto平衡存在定理.我们的结论统一、改进和推广了一些近期文献的已知结果.     

关于一类弱Berwald的(α,β)-度量

本文研究了一类重要的形如F=α +εβ +β arctan(β/α) (ε为常数)的弱Berwald (α, β)-度量.利用S-曲率公式,获得了这类度量为弱Berwald度量的充要条件.并且还证明了F为具有标量旗曲率的弱Berwald度量当且仅当它们为Berwald度量且旗曲率消失.     

N(2,2,0)代数的E-反演半群

本文研究了N(2,2,0)代数(S,*,△,0)的E-反演半群.利用N(2,2,0)代数的幂等元,弱逆元,中间单位元的性质和同宇关系,得到了N(2,2,0)代数的半群(S,*)构成E-反演半群的条件及元素α的右伴随非零零因子唯一,且为α的弱逆元等结论,这些结果进一步刻画了N(2,2,0)代数的结构.