共查询到17条相似文献,搜索用时 78 毫秒
1.
倪仁兴最近的文章研究了广义最速下降法强收敛于拟增生算子方程解的一特征条件.本文对此进行了修正和改进,给出了一个新的特征条件.所得结果同时改进和推广了一些已有的结果. 相似文献
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证明了广义最速下降逼近强收敛于定义在一致光滑实Banach空间的真子集上的局部有界拟增生算子的零点的一充要条件,相关的结果处理含ψ-强拟增生算子的非线性方程迭代解的收敛性.所得的结果推广和统一如Xu和Roach,Xu、Zhang和Roach,Chidume,Zegeye和Ntatin,徐宗本和蒋耀林,Chidume,Zhou等人的相应结果. 相似文献
3.
拟增生算子方程广义最速下降法的收敛性特征条件 总被引:3,自引:0,他引:3
本文给出了广义最速下降法强收敛于定义在一致光滑实Banach空间的真子集上的局部有界拟增生算子的零点的一特征条件.所得的结果推广和统一如徐宗本和蒋耀林等人的相应结果. 相似文献
4.
戈慈水 《纯粹数学与应用数学》2003,19(2):173-178
在一般的Banach空间中讨论了Φ—强拟增生算子方程的解和Φ—半压缩型算子不动点的迭代逼近问题,算子无Lipschitz假设或有界性要求,证明简捷,得到的结果统一、改进和推广了文[1—10]中的相应结果。 相似文献
5.
研究了一致光滑Banach空间中拟增生算子零点的迭代逼近问题,获得了一个大范围收敛定理,改进了许多已知的结果. 相似文献
6.
设X是光滑Banach空间,A:X→X是一致连续的m-增生算子,S:X→X是一致连续的φ--强增生算子,本文证明实光滑Banach空间上连续的m-增生算子是单值的且具误差的Ishikawa和Mann迭代序列强收敛到方程z=Sx+λAx的唯一解,其中z∈X,λ≥0.我们的结果改进和推广了近期文献中的相应结果. 相似文献
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本文引入增生算子条件(J∞0)的概念,给出了Banach空间中一大类非线性拟自治发展方程及其迭代近似系统解强收敛和弱收敛的充要条件. 相似文献
9.
本文在Banach空间中引入一类H-增生算子的混合拟变分包含,并提出求该变分包含问题解的邻近点法.通过H-增生算子的预解算子技术,建立了混合拟变分包含问题与邻近算子方程的等价关系,由这个等价关系得到求解邻近算子方程的迭代算法,该算法收敛于上述混合拟变分包含问题的解. 相似文献
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在一般Banach空间中研究了Lipschitz强增生算子迭代逼近及其误差估计问题. 相似文献
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本文在任意Banach空间中研究了Lipschitz φ-半压缩映象与φ-强拟增生映象的带误差项的Ishikawa迭代过程,使用新的分析技巧建立了几个强收敛定理. 相似文献
13.
Zen Harper 《Journal of Evolution Equations》2005,5(3):387-405
We study convolution operators on weighted Lebesgue spaces and obtain weight characterisations for boundedness of these operators
with certain kernels. Our main result is Theorem 3 which enables us to obtain results for certain kernel functions supported
on bounded intervals; in particular we get a direct proof of the known characterisations for Steklov operators in Section
3 by using the weighted Hardy inequality. Our methods also enable us to obtain new results for other kernel functions in Section
4. In Section 5 we demonstrate that these convolution operators are related to operators arising from the Weiss Conjecture
(for scalar-valued observation functionals) in linear systems theory, so that results on convolution operators provide elementary examples of nearly bounded semigroups
not satisfying the Weiss Conjecture. Also we apply results on the Weiss Conjecture for contraction semigroups to obtain boundedness
results for certain convolution operators. 相似文献
14.
In this article, we give a characterization of a class of bounded Fredholm operators on a Banach space which is developed to present some general existence results of the operators equation of the second kind. The obtained results are used to describe the Riesz–Schauder theory of compact operators in the more general setting of polynomially compact operators. 相似文献
15.
In this paper, we present the definitions of generalized e-concave operators and generalized e-convex operators, which are the generalizations of e-concave operators and e-convex operators, respectively. Without compactness or continuity assumption of generalized e-concave operators and generalized e-convex operators, we have proved the existence, uniqueness and monotone iterative techniques of their fixed points. Our results are even new to e-concave operators and e-convex operators. Finally, we apply the results to the singular boundary value problems for second order differential equations. 相似文献
16.
Morteza Seddighin 《Linear algebra and its applications》2011,434(5):1395-1408
We will study the slant joint antieigenvalues and antieigenvectors of pairs of operators that belong to the same closed normal subalgebra of the algebra of bounded operators on a separable Hilbert space. This extends the slant antieigenvalue theory from single normal operators to pairs of normal operators. Our results may be viewed as extensions of the Greub-Rheinboldt inequality from two positive operators to two normal operators. 相似文献