EuDML | Browse

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Displaying 41 – 60 of 111

On the canonical development of Parseval formulas for singular differential operators

Robert W. Carroll (1982)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

Per funzioni opportune $f, g$ si ottiene una formula di Parseval $\langle\mathbf{R}^{Q},\mathcal{Q}f\,\mathcal{Q}g\rangle_{\lambda}=\langle% \Delta_{Q}^{-1/2}f,\Delta_{Q}^{-1/2}g\rangle$ per operatori differenziali singolari di tipo dell'operatore radiale di Laplace-Beltrami. $\mathbf{R}^{Q}$ è una funzione spettrale generalizzata di tipo Marčenko e può essere rappresentata per mezzo di un certo nucleo della trasmutazione.

On the eigenvalues of a class of hypo-elliptic operators. IV

Johannes Sjöstrand (1980)

Annales de l'institut Fourier

Let $P$ be a selfadjoint classical pseudo-differential operator of order $> 1$ with non-negative principal symbol on a compact manifold. We assume that $P$ is hypoelliptic with loss of one derivative and semibounded from below. Then exp $(- t P)$ , $t \geq 0$ , is constructed as a non-classical Fourier integral operator and the main contribution to the asymptotic distribution of eigenvalues of $P$ is computed. This paper is a continuation of a series of joint works with A. Menikoff.

On the method of least squares of finding eigenvalues and eigenfunctions of some symmetric operators. II.

Karel Najzar (1970)

Commentationes Mathematicae Universitatis Carolinae

On the Relative Completeness of the Generalized Eigenvectors of Elliptic Eigenvalue Problems with Indefinite Weight Functions.

Peter Hess (1985)

Mathematische Annalen

On the Steps of Convergence of Approximate Eigenvectors in the Rayleigh-Schrödinger Series.

B.V. Limaye, R.P. Kulkarni (1983)

Numerische Mathematik

Once more about the monotonicity of the Temple quotients

Drahoslava Janovská, Ivo Marek (1984)

Aplikace matematiky

A new proof of the monotonicity of the Temple quotients for the computation of the dominant eigenvalue of a bounded linear normal operator in a Hilbert space is given. Another goal of the paper is a precise analysis of the length of the interval for admissible shifts for the Temple quotients.

Operators whose tensor powers are $ε$ - $π$ -continuous

Kamil John (1988)

Czechoslovak Mathematical Journal

Paley-Wiener Type Theorems by Transmutations.

M.Z. Nashed, A. Boumenir (2001)

The journal of Fourier analysis and applications [[Elektronische Ressource]]

Partial inner product spaces of entire functions

J.-P. Antoine, M. Vause (1981)

Annales de l'I.H.P. Physique théorique

Quasi -algebras and generalized inductive limits of C-algebras

Giorgia Bellomonte, Camillo Trapani (2011)

Studia Mathematica

A generalized procedure for the construction of the inductive limit of a family of C*-algebras is proposed. The outcome is no more a C*-algebra but, under certain assumptions, a locally convex quasi *-algebra, named a C*-inductive quasi *-algebra. The properties of positive functionals and representations of C*-inductive quasi *-algebras are investigated, in close connection with the corresponding properties of positive functionals and representations of the C*-algebras that generate the structure....