
Let \((D,d)\) be a metric space, \(CL(D)\) the family of all nonempty closed subsets of \(D\) endowed with the generalized Hausdorff metric \(H\), \(I:D\to D\) and \(T:D\to CL(D)\). In the first part of the paper, the authors study the existence of coincidence points and common fixed points of the pair \((I,T)\). They assume that \(T\) satisfies \(I\)-contractive or \(I\)-nonexpansive type conditions, e.g., \(H(Tx,Ty)\leq k\,\max \{d(Ix,Iy),\delta (Ix,Tx),\delta (Iy,Ty),\frac{1}{2} [\delta (Ix,Ty)+ \delta (Iy,Tx)]\}\) for all \(x,y\in D\) and some \(k\in [0,1)\), where \(\delta \) is the distance function in \(D\). Next, as an application, they obtain some invariant approximation results. In the final part, they present random analogous of these theorems.
random invariant approximation, Fixed-point and coincidence theorems (topological aspects), invariant approximation, Fixed-point theorems, Abstract approximation theory (approximation in normed linear spaces and other abstract spaces), coincidence point, I-nonexpansive map, Random nonlinear operators, Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc., random coincidence point, Set-valued maps in general topology, random operator
random invariant approximation, Fixed-point and coincidence theorems (topological aspects), invariant approximation, Fixed-point theorems, Abstract approximation theory (approximation in normed linear spaces and other abstract spaces), coincidence point, I-nonexpansive map, Random nonlinear operators, Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc., random coincidence point, Set-valued maps in general topology, random operator
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