构造m-增生算子方程解的Ishikawa迭代程序

设X是一致光滑Banach空间，T：D（T）∪↓X→X是具闭的定义域D（T）的m-增生算子。不经假设值域R（T）有界与对[0,1]中序列[βn}作任何限制，就表征了用于构造m-增生算子方程x Tx=f的解的具误差的Ishikawa迭代序列的收敛性。而且，若T还是局部Lipschitz算子，则给出了m-增生算子方程x Tx=f的逼近解的误差估计。     

关于m-增生算子零点的粘性复合迭代序列的强收敛性

在一致光滑的Banach空间的框架下,引入关于m-增生算子的一种新粘性复合迭代序列{xn},并证明了在适当的控制条件下,此迭代序列强收敛于m-增生算子的一个零点,用不同方法推广了相关文献的近代结果.     

关于增生算子方程解的Ishikawa迭代逼近

设X是任意实Banach空间,T:X→X是Lipschitz连续的增生算子.本文证明了,带误差的Ishikawa迭代序列强收敛到方程x Tx=f的唯一解.而且,还给Ishikawa迭代序列提供了一般的收敛率估计.利用该结果,本文推得,若T:X→X是Lipschitz连续的强增生算子,则带误差的Ishikawa迭代序列强收敛到方程Tx=f的唯一解.     

Banach空间中关于增生算子方程的迭代法的强收敛定理

设X是一实Banach空间,且T:X→X是Lipschitz连续的增生算子.在没有假设limn→∞αn=lim n→∞βn=0之下,本文证明了,Ishikawa迭代序列强收敛到方程x+Tx=f的唯一解,而且还对Ishikawa迭代序列提供了一般的收敛率估计.利用该结果,我们推得,当T:X→X是Lipschitz连续的强增生算子时, Ishikawa迭代序列强收敛到方程Tx=f的唯一解.     

Banach空间中关于增生算子方程的迭代法的强收敛定理

设X是一实Banach空间,且TX→X是Lipschitz连续的增生算子.在没有假设lim αn=1imβn=0之下,本文证明了,Ishikawa迭代序列强收敛到方程x+Tx=f的唯一解,而且还对Ishikawa迭代序列提供了一般的收敛率估计.利用该结果,我们推得,当TX→X是Lipschitz连续的强增生算子时,Ishikawa迭代序列强收敛到方程Tx=f的唯一解.     

Banach空间中逆强增生算子修正的Halpern迭代序列强收敛性

在一致凸一致光滑的Banach空间中,引进了一个新的修正的Halpern迭代序列,并证明了该迭代序列关于α-逆强增生算子的强收敛性,所得结果把其他一些相关的近代结果从2-一致光滑Banach空间推广到一致光滑Banach空间,并且证明方法也不相同.     

一个构造增生映像零点的带误差的迭代算法

设E是一致光滑的Banach空间,A:D(A)E→2~E是一个满足值域条件的增生算子,进一步满足线性增长条件:‖Ax‖≤C(1+‖x‖)对某个常数C0, x∈D(A).设z∈D(A)是任意固定元,x_1∈D(A), A~(-1)0≠Φ.定义序列{x_n}D(A)如下:x_(n+1)∈x_n-λ_n(Ax_n+θ_n(x_n-z+e_n)),n≥1,其中{λ_n}与{θ_n}是满足一定条件的非负数列.则x_n→x~*∈A~(-1)(0),(n→∞).作为应用,我们推出构造连续伪压缩映像的不动点的收敛定理.     

一类强增生算子方程解的Mann迭代收敛问题

设X是实Banach空间,D是X的一个子集,T:X→X是一强增生算子,从而得到带误差的Mann迭代序列的逼近不动点的强收敛问题.     

Banach空间中一般的强增生算子方程解的迭代逼近

设1相似文献   

Banach空间中一般的强增生算子方程解的迭代逼近

设1＜p≤2,X是实p-一致光滑的Banach空间,TX→X是一强增生算子,研究了用于求方程Tx=f解的带误差的Ishikawa迭代程序分别在条件αn→0(n→∞)与条件0＜α≤αn((A)n≥0)下的强收敛问题,改进与推广了现有的结果.     

Banach空间中带扰动的m-增生算子的零点与映象定理

设X为实Banach空间,TX D(T)→2x为m-增生算子,CD(T)→X为有界算子(未必连续),而C(T+I)-1为紧算子.假设     

迭代逼近m-增生映象的零点

设E是具有一致正规结构的实Banach空间,其范数是一致Gateaux可微的.设A是m-增生映象,使得C=■是E的凸子集,数列{α_n)■[0,1],{r_n}■ (0,∞),在适当的条件下,则由(1.2)式定义的迭代序列{x_n}强收敛于A~(-1)(0)中的点.其次证明了:设E是一致凸Banach空间,其范数是Frechet可微的.设数列{α_n},{β_n)■(0,1),{r_n}■(0,∞),满足适当的条件.如果A~(-1)(0)∩B~(-1)(0)≠φ,则由(3.20)式定义的序列{x_n}弱收敛于A~(-1)(0)∩B~(-1)(0)中的点.其结果推广和改进了Kamimura,Takahashi(2000)的定理2及Xu H.K.(2006)的定理4.1,定理4.2和定理4.3:(i)Kamimura,Takahashi(2000)定理2中的假设"自反Banach空间E的每个有界闭凸子集对非扩张自映象有不动点性质"被去掉;(ii)Xu H.K.(2006)的假设"E是具有弱连续对偶映象J_φ的自反Banach空间",被本文的假设"E是具有一致正规结构且其范数是一致Gateaux可微的Banach空间"所取代.从而补充了Xu H.K.(2006)未包含的另外一些Banach空间.同时还证明了逼近两个m-增生映象的公共零点,其结果也推广和改进了Mainge的相应结果.     

Banach空间中带扰动的m-增生算子的映射定理

利用范数假设条件给出了带扰动的ｍ一增生算子的一些映射定理．其结果是：Ｂ＋Ｄ　　Ｒ（Ｔ＋Ｃ）并且ｉｎｔ（Ｂ＋Ｄ）　Ｒ（Ｔ＋Ｃ）的类型．其中Ｂ、Ｄ是实Ｂａｎａｃｈ空间Ｘ的子集,算子Ｔ：Ｘ　Ｄ（Ｔ）→２~Ｘ至少是ｍ一增生的,扰动算子 Ｃ： Ｘ　Ｄ（Ｃ）→Ｘ至少是紧、ｄｅｍｉ一半连续或完全连续的．这些结果推广和改进了已有文献的有关结果．     

关于强增生算子的带误差项的Ishikawa和Mann迭代程序的注记

设Ｘ是实Ｂａｎａｃｈ空间,Ｈ：Ｘ→Ｘ是Ｌｉｐｓｃｈｉｔｚ算子,Ｔ：Ｘ→Ｘ是值域有界且一致连续的算子,Ｈ＋Ｔ是强增生算子,则具有误差项的Ｉｓｈｉｋａｗａ和Ｍａｎｎ迭代序列强收敛到方程Ｈｘ＋Ｔｘ＝ｆ的唯一解,这些结论推广了最新文献中的相应结果。     

Rothe’s method to parabolic integra-differential equations via abstract integra-differential equations

In this paper an abstract integrodiffe-rential equation associated with a singlevalued m-accretive operator is considered in a Banach space whose dual is uniformly convex. The existence and uniqueness of strong solution is proved with the help of Rothe's method. The established results are then applied to assert the existence of unique strong solution of a class of parabolic initial boundary value problems with memory     

Slowly changing vectors and the asymptotic finite-dimensionality of an operator semigroup

Siberian Mathematical Journal - Let X be a Banach space and let T: X → X be a linear power bounded operator. Put X 0 = {x ∈ X | T n x → 0}. We prove that if X 0 ≠ X then...     

Certain classes of sets in Banach spaces and a topological characterization of operators of type RN

We study properties of bounded sets in Banach spaces, connected with the concept of equimeasurability introduced by A. Grothendieck. We introduce corresponding ideals of operators and find characterizations of them in terms of continuity of operators in certain topologies. The following result (Corollary 9) follows from the basic theorems: Let T be a continuous linear operator from a Banach space X to a Banach space Y. The following assertions are equivalent:

1. T is an operator of type RN;
2. for any Banach space Z, for any number p, p > 0, and any p-absolutely summing operator U:Z → X the operator TU is approximately p-Radonifying;
3. for any Banach space Z and any absolutely summing operator U:Z → X the operator TU is approximately 1-Radonifying.

We note that the implication I)?2), is apparently new even if the operator T is weakly compact.     

Modified Ishikawa Iteration Process for Nonlinear Lipschitz Generalized Strongly Pseudo-Contractive Operators in Arbitrary Banach Spaces

In this paper, we modify the Ishikawa iteration process and show that such process, associated with a nonlinear Lipschitzian generalized strongly pseudo-contractive operator with a fixed point in a (not necessarily uniformly smooth) Banach space, converges strongly to the unique fixed point of this operator.     

New semi-implicit midpoint rule for zero of monotone mappings in Banach spaces

Numerical Algorithms - Let E be a nonempty closed uniformly convex and 2-uniformly smooth Banach space with dual E? and A : E? → E be Lipschitz continuous monotone mapping with...