Normal structure and fixed points of nonexpansive maps in general topological spaces.
Normale Auflösbarkeit bei linearen partiellen Differentialoperatoren in lokalen gewichteten Sobolevräumen.
Norms and Determinants of Linear Mappings.
Norms for copulas.
Norms of certain operators on weighted spaces and Lorentz sequence spaces.
Norms of certain rational functions of a matrix and Schur's criterion for polynomials
Norms of composition operators on the Hardy space.
Norms of Harmonic Projection Operators on Compact Lie Groups.
Norms of hypercyclic sequences.
Norms of inverses, spectra, and pseudospectra of large truncated Wiener-Hopf operators and Toeplitz matrices.
Norm-to-weak upper semicontinuous monotone operators are generically strongly continuous.
Note on a Paper of T. Lezanski Concerning ΄΄Almost Reciprocal Operations΄΄
Note on analytic regularity of heat kernels on nilpotent Lie groups
Let G be the simplest nilpotent Lie group of step 3. We prove that the densities of the semigroup generated by the sublaplacian on G are not real-analytic.
Note on functional-differential equations with initial functions of bounded variation
Note on KKM maps and applications.
Note on measures of noncompactness in Banach sequence spaces.
The notion of a measure of noncompactness turns out to be a very important and useful tool in many branches of mathematical analysis. The current state of this theory and its applications are presented in the books [1,4,11] for example.The notion of a measure of weak noncompactness was introduced by De Blasi [8] and was subsequently used in numerous branches of functional analysis and the theory of differential and integral equations (cf. [2,3,9,10,11], for instance).In this note we summarize our...
Note on multiplicative perturbation of local -regularized cosine functions with nondensely defined generators.
Note on nonlinear semigroups and free boundary problem for controlled Markov processes
Note on nonlinear spectral theory: Application to boundary value problems for ordinary integrodifferential equations
Note on operational quantities and Mil'man isometry spectrum.
Let X and Y be infinite dimensional Banach spaces and let L(X,Y) be the class of all (linear continuous) operators acting between X and Y. Mil'man [5] introduced the isometry spectrum I(T) of T ∈ L(X,Y) in the following way:I(T) = {α ≥ 0: ∀ ε > 0, ∃M ∈ S∞(X), ∀x ∈ SM, | ||Tx|| - α | < ε}},where S∞(X) is the set of all infinite dimensional closed subspaces of X and SM := {x ∈ M: ||x|| = 1} is the unit sphere of M ∈ S∞(X). (...)