M. Malamud

activity

20002026

most citedWeyl function of a Hermitian operator and its connection with characteristic function

13 citations · 49 across the 24 of their papers we have counts for

collaborators

Showing 2015Show all

4 papers · 1 filter

math.SP2015★ 2 cited

On the Riesz basis property of root vectors system for $2 \times 2$ Dirac type operators

Anton A. Lunyov, Mark M. Malamud

The paper is concerned with the Riesz basis property of a boundary value problem associated in $L^{2} [0, 1] \otimes C^{2}$ with the following $2 \times 2$ Dirac type equation $…

math.FA2015★ 3 cited

Invariance theorems for Nevanlinna families

Vladimir Derkach, Seppo Hassi, Mark Malamud

A complex function $f (z)$ is called a Herglotz-Nevanlinna function if it is holomorphic in the upper half-plane $C_{+}$ and maps $C_{+}$ into itself. By a maximum p…

math.SP2015★ 13 cited

Weyl function of a Hermitian operator and its connection with characteristic function

Vladimir Derkach, Mark Malamud

Let $A$ be a densely defined symmetric operator with equal deficiency indices in a Hilbert space. We introduce the notion of a Weyl function $M (z)$ of $A$ corresponding to an ordin…

math.CA2015★ 3 cited

Radial positive definite functions and Schoenberg matrices with negative eigenvalues

L. Golinskii, M. Malamud, L. Oridoroga

The main object under consideration is a class $Φ_{n} \ Φ_{n + 1}$ of radial positive definite functions on $R^{n}$ which do not admit \emph{radial positive definite continuation…

On the Riesz basis property of root vectors system for 2×2 Dirac type operators

Invariance theorems for Nevanlinna families

Weyl function of a Hermitian operator and its connection with characteristic function

Radial positive definite functions and Schoenberg matrices with negative eigenvalues

On the Riesz basis property of root vectors system for $2 \times 2$ Dirac type operators