26 citations · 45 across the 10 of their papers we have counts for
13 papers
A double-phase Neumann problem with
Alexandros Matsoukas, Nikos Yannakakis
We study a double-phase Neumann problem with non-homogeneous boundary conditions, where the lowest exponent is equal to 1. The existence of a solution is established as the lim…
On the solutions of a double-phase Dirichlet problem involving the 1-Laplacian
Alexandros Matsoukas, Nikos Yannakakis
In this paper we study a double-phase problem involving the 1-Laplacian with non-homogeneous Dirichlet boundary conditions and show the existence and uniqueness of a solution in a…
The double phase Dirichlet problem when the lowest exponent is equal to 1
Alexandros Matsoukas, Nikos Yannakakis
In this paper we prove an existence and uniqueness result for the double phase Dirichlet problem when the lowest exponent is equal to 1. Our solution is a function of bounded varia…
A geometric characterization of range-kernel complementarity
Dimosthenis Drivaliaris, Nikos Yannakakis
We show that a bounded linear operator on a Banach space with closed range has range-kernel complementarity if and only if its generalized amplitude is less than . An applicatio…
The spectrum of the restriction to an invariant subspace
Dimosthenis Drivaliaris, Nikos Yannakakis
Let be a Banach space, and be an invariant subspace of . We present an alternative proof that, if the spectrum of the restriction of to contains a po…
The angle along a curve and range-kernel complementarity
Dimosthenis Drivaliaris, Nikos Yannakakis
In this paper, we define the angle of a bounded linear operator along an unbounded path emanating from the origin and use it to characterize range-kernel complementarity. In pa…