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1.
增算子的不动点和广义不动点 总被引:35,自引:2,他引:35
本文在紧性条件下证明了若干新的非连续的增算子的不动点定理.如果不假定增算子 A 满足连续性条件和紧性条件,我们证明了算子 A 有广义不动点. 相似文献
2.
半序赋范空间及增算子的不动点定理 总被引:8,自引:1,他引:7
张宪 《应用泛函分析学报》2001,3(3):256-260
在赋范线性空间E中定义了由E上连续性泛函确定的半序,并由半序引出E上的锥,讨论了半序和锥的若干性质,最后证明了几个单调增算子的不动点定理。 相似文献
3.
In this paper,we give a fixed point theorem under the weak conditions and some corollaries,which generalize the results of [1]-[5]. 相似文献
4.
一个非连续增算子不动点定理及其应用 总被引:8,自引:0,他引:8
本文在无限区间上给出了一个新的非连续增算子不动点定理。作为应用,我们研究了无限区间上Banach空间中非线性积-微分方程初值问题解的存在性。 相似文献
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利用锥理论和非对称迭代方法,讨论了不具有连续性和紧性条件的增算子方程解的存在唯一性.作为其应用着重讨论了非增算子方程解的存在唯一性,并给出了迭代序列收敛于解的误差估计,改进和推广了某些已知结果. 相似文献
7.
一类增算子的不动点定理的推广及应用 总被引:1,自引:0,他引:1
利用锥理论单调迭代技巧,研究Banach空间中不具有任何紧性、连续性和凹凸性条件的增算子的不动点的存在唯一性,所得结果改进和推广了增算子的某些已知相应结果. 相似文献
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9.
讨论了C[I,E]和L_p[I,E]中几类增算子,得到了若干新的不动点定理,并将其应用于证明非线性微分方程唯一解的存在性. 相似文献
10.
Under some general continuous and compact conditions, the existence problems of fiked points andd coupled fixed points for increasing operators are studied. an application, we utilize the results obtained to study the existence of solutions for differential inclusions in Banach spaces. 相似文献
11.
Xian Zhang 《Journal of Mathematical Analysis and Applications》2007,333(2):780-786
In this paper, some new generalized contractive type conditions for a pair of mappings in metric space are defined. Some common fixed point results for these mappings are presented. 相似文献
12.
Jungck's [G. Jungck, Compatible mappings and common fixed points, Int. J. Math. Math. Sci. 9 (1986) 771-779] notion of compatible mappings is further extended and used to prove some common fixed point theorems for weakly compatible non-self mappings in complete convex metric spaces. We improve on the method of proof used by Rhoades [B.E. Rhoades, A fixed point theorem for non-self set-valued mappings, Int. J. Math. Math. Sci. 20 (1997) 9-12] and Ahmed and Rhoades [A. Ahmed, B.E. Rhoades, Some common fixed point theorems for compatible mappings, Indian J. Pure Appl. Math. 32 (2001) 1247-1254] and obtain generalization of some known results. In particular, a theorem by Rhoades [B.E. Rhoades, A fixed point theorem for non-self set-valued mappings, Int. J. Math. Math. Sci. 20 (1997) 9-12] is generalized and improved. 相似文献
13.
研究了范围广泛的半闭1-集压缩算子及凝聚算子,获得了一些新的不动点定理,所获结果推广了已知的结论. 相似文献
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In this work, we study some new common fixed point results for generalized contractive multi-valued non-self-mappings on complete metric spaces. 相似文献
16.
This paper presents some fixed point theorems for expansion selfmaps on complete cone metric spaces. 相似文献
17.
一类单调算子的新不动点定理 总被引:1,自引:0,他引:1
利用单调迭代法、数学归纳法以及序差距的性质,在半序Banach空间中探究不具有紧性、连续性以及任何凹凸性的单调算子不动点存在以及惟一性问题,得出其新不动点定理,这些结果对相关结论进行了推广,使其适用范围更广,同时将该结论应用于求解Volterra型积分方程组问题中. 相似文献
18.
A new condition for mappings, called condition (C), which is more general than nonexpansiveness, was recently introduced by Suzuki [T. Suzuki, Fixed point theorems and convergence theorems for some generalized nonexpansive mappings, J. Math. Anal. Appl. 340 (2008) 1088-1095]. Following the idea of Kirk and Massa Theorem in [W.A. Kirk, S. Massa, Remarks on asymptotic and Chebyshev centers, Houston J. Math. 16 (1990) 364-375], we prove a fixed point theorem for mappings with condition (C) on a Banach space such that its asymptotic center in a bounded closed and convex subset of each bounded sequence is nonempty and compact. This covers a result obtained by Suzuki [T. Suzuki, Fixed point theorems and convergence theorems for some generalized nonexpansive mappings, J. Math. Anal. Appl. 340 (2008) 1088-1095]. We also present fixed point theorems for this class of mappings defined on weakly compact convex subsets of Banach spaces satisfying property (D). Consequently, we extend the results in [T. Suzuki, Fixed point theorems and convergence theorems for some generalized nonexpansive mappings, J. Math. Anal. Appl. 340 (2008) 1088-1095] to many other Banach spaces. 相似文献
19.
Vasile Berinde Marin Borcut 《Nonlinear Analysis: Theory, Methods & Applications》2011,74(15):4889-4897
In this paper, we introduce the concept of tripled fixed point for nonlinear mappings in partially ordered complete metric spaces and obtain existence, and existence and uniqueness theorems for contractive type mappings. Our results generalize and extend recent coupled fixed point theorems established by Gnana Bhaskar and Lakshmikantham [T. Gnana Bhaskar, V. Lakshmikantham, Fixed point theorems in partially ordered metric spaces and applications, Nonlinear Anal. 65 (7) (2006) 1379-1393]. Examples to support our new results are given. 相似文献
20.
M. AamriD. El Moutawakil 《Journal of Mathematical Analysis and Applications》2002,270(1):181-188
The main purpose of this paper is to give some new common fixed point theorems under strict contractive conditions for mappings satisfying a new property. 相似文献