On multiparameter spectral theory.
On multiple sign-changing solutions for some second-order integral boundary value problems.
On multiple solutions of the Neumann problem involving the critical Sobolev exponent
We consider the Neumann problem involving the critical Sobolev exponent and a nonhomogeneous boundary condition. We establish the existence of two solutions. We use the method of sub- and supersolutions, a local minimization and the mountain-pass principle.
On Multiplicative Lebesgue Integration and Families of Evolution Operators.
On multipoint iterative processes of efficiency index higher than Newton's method.
On multivalued mappings in paranormed spaces
On multivalued nonlinear variational inclusion problems with -accretive mappings in Banach spaces.
On Musielak-Orlicz spaces isometric to L2 or L∞.
It is proved that a Musielak-Orlicz space LΦ of real valued functions which is isometric to a Hilbert space coincides with L2 up to a weight, that is Φ(u,t) = c(t) u2. Moreover it is shown that any surjective isometry between LΦ and L∞ is a weighted composition operator and a criterion for LΦ to be isometric to L∞ is presented.
On --normal and --quasinormal semi-Hilbertian space operators
The purpose of the paper is to introduce and study a new class of operators on semi-Hilbertian spaces, i.e. spaces generated by positive semi-definite sesquilinear forms. Let be a Hilbert space and let be a positive bounded operator on . The semi-inner product , , induces a semi-norm . This makes into a semi-Hilbertian space. An operator is said to be --normal if for some positive integers and .
On -normed spaces.
On Nambu bracket representations of 3-algebras.
On near-standardness in Hilbert spaces.
On Nemytskii Lipschitzian operator
On nets of local algebras on , covariant with respect to the discrete Poincaré group ; causality and scattering theory
On Neumann operators.
On Newton-Like Methods.
On nilpotent operators
We give several necessary and sufficient conditions in order that a bounded linear operator on a Banach space be nilpotent. We also discuss three necessary conditions for nilpotency. Furthermore, we construct an infinite family (in one-to-one correspondence with the square-summable sequences of strictly positive real numbers) of nonnilpotent quasinilpotent operators on an infinite-dimensional Hilbert space, all the iterates of each of which have closed range. Each of these operators (as well as...
On (n,k)-quasiparanormal operators
Let T be a bounded linear operator on a complex Hilbert space . For positive integers n and k, an operator T is called (n,k)-quasiparanormal if for x ∈ . The class of (n,k)-quasiparanormal operators contains the classes of n-paranormal and k-quasiparanormal operators. We consider some properties of (n,k)-quasiparanormal operators: (1) inclusion relations and examples; (2) a matrix representation and SVEP (single valued extension property); (3) ascent and Bishop’s property (β); (4) quasinilpotent...
On non-absolute functional Volterra integral equations and impulsive differential equations in ordered Banach spaces.
On non-archimedean locally convex spaces