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Abstract Let a<c<b real numbers, (B,|·|) a (real or complex) Banach space, H∈C([a,b]×[a,c]×B,B),K∈C([a,b]² ×B,B),g∈C([a,b],B),A:C([a,c],B)→C([a, c], B) and B:C([a,b],B)→C([a,b],B). In this…

Abstract This paper deals with the light travel time effect in binary systems with variable components. The methods for estimation…

Abstract We establish compression-expansion type fixed point theorems for systems of operator inclusions with decomposable multivalued maps. The approach is…

Abstract The aim of this paper is to draw attention to a general principle for solving control problems for operator…

AbstractIn this paper, the operator approach based on the fixed point principles of Banach and Schaefer is used to establish…