Results 61 to 70 of about 3,220,405 (234)

Fixed gate point location problems

open access: yesTOP, 2020
Given a metric space with a set of given facilities, location theory asks to place a new facility which minimizes the distances to the given ones. Many results for a variety of problems with norms or metrics as distances are known in the space $${\mathbb {R}}^n$$
openaire   +3 more sources

On Fixed Point and Almost Fixed Point Problems of Lower Semicontinuous Type Multivalued Mappings

open access: yesActa Mathematica Sinica, English Series, 2005
The authors obtain almost fixed point theorems and fixed point theorems for lower semicontinuous type multivalued mappings in metrizable H-spaces. As an application, they obtain a nonempty intersection theorem for a multivalued mapping on a compact H-convex space. The main results are good variants and generalizations of the almost fixed point theorems
Liang Yu Luan, Xian Wu
openaire   +4 more sources

Intermediate fixed point in a Luttinger liquid with elastic and dissipative backscattering

open access: yes, 2015
In a recent work [Phys. Rev. Lett. {\bf 108}, 136401 (2012)] we have addressed the problem of a Luttinger liquid with a scatterer that allows for both coherent and incoherent scattering channels.
Altland, Alexander   +2 more
core   +1 more source

New Existence Results for Fixed Point Problem and Minimization Problem in Compact Metric Spaces

open access: yesAbstract and Applied Analysis, 2014
We first present some new existence theorems for fixed point problem and minimization problem in compact metric spaces without assuming that mappings possess convexity property.
Weng-Seng Heng, Wei-Shih Du, Chi-Lin Yen
doaj   +1 more source

Discussion on the fixed point problems with constraint inequalities

open access: yesJournal of Inequalities and Applications, 2018
In this paper, we introduce the concept of comparable complete metric spaces and consider some fixed point theorems for mappings in the setting of incomplete metric spaces. We obtain the results of Ansari et al. [J. Fixed Point Theory Appl. 20:26, 2018] with weaker conditions. Moreover, we provide some corollaries and examples show that our main result
Badr Alqahtani   +3 more
openaire   +4 more sources

Iterative Algorithms for the Split Problem and Its Convergence Analysis

open access: yesAbstract and Applied Analysis, 2014
Now, it is known that the split common fixed point problem is a generalization of the split feasibility problem and of the convex feasibility problem. In this paper, the split common fixed point problem associated with the pseudocontractions is studied ...
Zhangsong Yao   +3 more
doaj   +1 more source

On the Complexity of 2D Discrete Fixed Point Problem

open access: yesTheoretical Computer Science, 2006
AbstractWe study a computational complexity version of the 2D Sperner problem, which states that any three coloring of vertices of a triangulated triangle, satisfying some boundary conditions, will have a trichromatic triangle. In introducing a complexity class PPAD, Papadimitriou [C.H.
Xi Chen, Xiaotie Deng
openaire   +2 more sources

Overscreened Kondo fixed point in S=1 spin liquid

open access: yes, 2012
We propose a possible realization of the overscreened Kondo impurity problem by a magnetic s=1/2 impurity embedded in a two-dimensional S=1 U(1) spin liquid with a Fermi surface.
Lee, Patrick A.   +2 more
core   +1 more source

Critical Theory of Non-Fermi Liquid Fixed Point in Multipolar Kondo Problem

open access: yesPhysical Review X, 2020
When the ground state of a localized ion is a non-Kramers doublet, such localized ions may carry multipolar moments. For example, Pr^{3+} ions in a cubic environment would possess quadrupolar and octupolar, but no magnetic dipole, moments.
Adarsh S. Patri, Yong Baek Kim
doaj   +1 more source

Modified Krasnoselski–Mann iterative method for hierarchical fixed point problem and split mixed equilibrium problem

open access: yesJournal of Inequalities and Applications, 2020
In this paper, we introduce a modified Krasnoselski–Mann type iterative method for capturing a common solution of a split mixed equilibrium problem and a hierarchical fixed point problem of a finite collection of k-strictly pseudocontractive nonself ...
Jong Kyu Kim, Prashanta Majee
doaj   +1 more source

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