N Congruency of Operators
-type quotient modules on the torus.
N-Body quantum systems with singular potentials
Necessary conditions for normal solvability in duals of LF-spaces.
Nevanlinna-Pick interpolation for Schur-Agler class functions on domains with matrix polynomial defining function in .
New characterizations and applications of inhomogeneous Besov and Triebel-Lizorkin spaces on homogeneous type spaces and fractals [Book]
New characterizations of asymptotic stability for evolution families on Banach spaces.
New extended Weyl type theorems
New Proof of Naimark's Theorem on the Existence of Nonpositive Invariant Subspaces for Commuting Families of Unitary Operators in Pontryagin Spaces.
Newton-type iterative methods for nonlinear ill-posed Hammerstein-type equations
We use a combination of modified Newton method and Tikhonov regularization to obtain a stable approximate solution for nonlinear ill-posed Hammerstein-type operator equations KF(x) = y. It is assumed that the available data is with , K: Z → Y is a bounded linear operator and F: X → Z is a nonlinear operator where X,Y,Z are Hilbert spaces. Two cases of F are considered: where exists (F’(x₀) is the Fréchet derivative of F at an initial guess x₀) and where F is a monotone operator. The parameter...
Nichtlineare Störung der isolierten Eigenwerte selbstadjungierter Operatoren.
Nilpotent Lie groups and eigenfunction expansions of Schrödinger operators II
Nilpotent Lie groups and summability of eigenfunction expansions of Schrödinger operators
Non supercyclic subsets of linear isometries on Banach spaces of analytic functions
Let be a Banach space of analytic functions on the open unit disk and a subset of linear isometries on . Sufficient conditions are given for non-supercyclicity of . In particular, we show that the semigroup of linear isometries on the spaces (), the little Bloch space, and the group of surjective linear isometries on the big Bloch space are not supercyclic. Also, we observe that the groups of all surjective linear isometries on the Hardy space or the Bergman space (, ) are not supercyclic....
Non-abelian extensions have nonsimple spectrum
Non-Analytic Functional Calculi in Several Variables.
Non-analytic local functional calculus
Non-analytic local spectral properties in several variables
Non-Archimedean adjoints
Noncommutative fractional integrals
Let ℳ be a hyperfinite finite von Nemann algebra and be an increasing filtration of finite-dimensional von Neumann subalgebras of ℳ. We investigate abstract fractional integrals associated to the filtration . For a finite noncommutative martingale adapted to and 0 < α < 1, the fractional integral of x of order α is defined by setting for an appropriate sequence of scalars. For the case of a noncommutative dyadic martingale in L₁() where is the type II₁ hyperfinite factor equipped...