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Abstract Let \(a<c<b)\) real numbers, \((\mathbb{B},|\cdot|)\) a (real or complex) Banach space, \(H\in C([a,b]\times [a,c]\times\mathbb{B},\mathbb{B})\), \(K\in C([a,b]^{2}\times\mathbb{B},\mathbb{B})\),  \(g\in C([a,b]),\mathbb{B} ,A:C([a,c],\mathbb{B})\rightarrow…

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

Abstract We deal with the existence and localization of positive radial solutions for Dirichlet problems involving \(\phi\)-Laplacian operators in a…