Titlebook: Recent Advances in Operator Theory; The Israel Gohberg A A. Dijksma,M. A. Kaashoek,A. C. M. Ran Conference proceedings 2001 Birkhäuser Verl

辫子带来帮助

Elliptic Spectral Problems of Higher Order with Eigenparameter Dependent Boundary Conditions,dary conditions ... = λ ..., .’... 0, where .., .., and .’. are sets of boundary operators. The problem is recast in the form .. = λ. in an appropriate Hilbert space, and the essential spectrum of the corresponding operator . is found.

沙发

Nutrient

大范围流行

On Riccati Equations and Reproducing Kernel Spaces,in terms of a singular Hermitian matrix . is analyzed. It is shown that if . is positive semidefinite, then .. is a reproducing kernel Hilbert space of the kind that originates in the work of L. de Branges if and only if . is a solution of an associated Riccati equation and a certain invariance cond

流逝

A Status Report on the Asymptotic Behavior of Toeplitz Determinants with Fisher-Hartwig Singularitibeen proved in many cases and reformulated in others. Recently, the author proved the conjecture in all the cases in which it can be expected to be true. In the present paper we want to give an account of the latest developments in connection with this conjecture and describe the main ideas of the p

gustation

,On the Spectrum of Unbounded Off-diagonal 2 × 2 Operator Matrices in Banach Spaces,w that the spectral properties of such operator matrices are closely related to those of the product operators .... and ..... The results on the spectra generalize well-known results on so-called supersymmetries, i.e., selfadjoint 2 × 2 off-diagonal operator matrices.in the product of Hilbert spaces

阶层

Multithreshold Spectral Phase Transitions for a Class of Jacobi Matrices,nal matrix and . is a Jacobi matrix with zero main diagonal and modulated weights λ .(e.g. λ. = ...., . 0). Depending on whether the coupling constant . belongs to the absolutely continuous spectrum of .. or not, the spectrum of . + . is either pure absolutely continuous or discrete. This gives us a

notion

Infantry

Scattering of Waves by Periodic Gratings and Factorization Problems,sical and mathematical literature starting from the papers of Rayleigh. A new approach to treat this problem is proposed in the present paper. It is based on the possibility to reformulate the scattering problem in terms of abstract ordinary differential equation with constant operator coefficients

遗传

ssen während meiner nun 18jährigen Tätigkeit als Heilerziehungspflegerin und von der daraus resultierenden fortwährenden Auseinandersetzung mit Sprache und Kommunikation geprägt. Zudem bin ich der Ansicht, daß Sprache Sicht von Welt bestimmt. Durch aktiven Sprachgebrauch, mit seinen übernommenen ode