On the ellipticity and solvability of an abstract second-order differential equation.
On the embedding theorem
On the equality between some classes of operators on Banach lattices
We establish some sufficient conditions under which the subspaces of Dunford-Pettis operators, of M-weakly compact operators, of L-weakly compact operators, of weakly compact operators, of semi-compact operators and of compact operators coincide and we give some consequences.
On the equality of injective and projective tensor products
On the equation in Banach spaces
On the equations X=KXS and AX=XK
On the equivalence of differential operators of infinite order with constant coefficients
We investigate the conditions of equivalence of a differential operator of infinite order with constant coefficients to the operator of differentiation in one space of analytic functions. We also study the conditions of continuity of a differential operator of infinite order with variable coefficients in such space.
On the equivalence of Mann and Ishikawa iteration methods.
On the ergodic limits for unitary periodic propagators.
On the ergodic power function for invertible positive operators
On the ergodic theory of contractions
On the essential approximate point spectrum II
On the essential order spectrum
On the essential spectra of matrix operators and applications.
On the essential spectrum of many-particle pseudorelativistic Hamiltonians with permutational symmetry account.
On the Essential Spectrum of Schrödinger Operators with Spherically Symmetric Potentials.
On the essential spectrum of the Jansen-Hess operator for two-electron ions.
On the existence and convergence of approximate solutions for equilibrium problems in Banach spaces.
On the existence and regularity of solutions of linear equations in spaces
On the existence and the stability of solutions for higher-order semilinear Dirichlet problems
We investigate the existence and stability of solutions for higher-order two-point boundary value problems in case the differential operator is not necessarily positive definite, i.e. with superlinear nonlinearities. We write an abstract realization of the Dirichlet problem and provide abstract existence and stability results which are further applied to concrete problems.