辫子带来帮助
发表于 2025-3-25 06:51:51
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
发表于 2025-3-25 09:12:54
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Nutrient
发表于 2025-3-25 13:57:50
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大范围流行
发表于 2025-3-25 18:11:44
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
发表于 2025-3-25 21:13:38
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
发表于 2025-3-26 03:21:32
,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
发表于 2025-3-26 04:18:55
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
发表于 2025-3-26 08:51:46
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Infantry
发表于 2025-3-26 14:19:01
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
发表于 2025-3-26 19:37:03
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