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1

Joint similarity and dilations for noncontractive sequences of operators

Aurelian Gheondea, Gelu Popescu

Journal:

Journal of Functional Analysis

Year:

2003

Language:

english

File:

PDF, 377 KB

english, 2003

2

Hermitian kernels with bounded structure

Tiberiu Constantinescu, Aurelian Gheondea

Journal:

Integral Equations and Operator Theory

Year:

1997

Language:

english

File:

PDF, 1.28 MB

english, 1997

3

A note on the existence, uniqueness and symmetry of par-balanced realizations

Aurelian Gheondea, Raimund J. Ober

Journal:

Integral Equations and Operator Theory

Year:

2000

Language:

english

File:

PDF, 677 KB

english, 2000

4

Embeddings, Operator Ranges, and Dirac Operators

Petru Cojuhari, Aurelian Gheondea

Journal:

Complex Analysis and Operator Theory

Year:

2011

Language:

english

File:

PDF, 205 KB

english, 2011

5

Minimal signature in lifting of operators, II

Tiberiu Constantinescu, Aurelian Gheondea

Journal:

Journal of Functional Analysis

Year:

1992

Language:

english

File:

PDF, 1.50 MB

english, 1992

6

Index formulae for subspaces of Kreîn spaces

AAD Dijksma, Aurelian Gheondea

Journal:

Integral Equations and Operator Theory

Year:

1996

Language:

english

File:

PDF, 693 KB

english, 1996

7

On Two Equivalent Dilation Theorems in VH-Spaces

Aurelian Gheondea, Baris Evren Ugurcan

Journal:

Complex Analysis and Operator Theory

Year:

2012

Language:

english

File:

PDF, 333 KB

english, 2012

8

Triplets of Closely Embedded Hilbert Spaces

Cojuhari, Petru, Gheondea, Aurelian

Journal:

Integral Equations and Operator Theory

Year:

2015

Language:

english

File:

PDF, 499 KB

english, 2015

9

On the Indefinite Trigonometric Moment Problem of I. S. Iohvidov and M. G. Kreîn

Tiberiu Constantinescu, Aurelian Gheondea

Journal:

Mathematische Nachrichten

Year:

1995

Language:

english

File:

PDF, 681 KB

english, 1995

10

Bounded characteristic functions and models for noncontractive sequences of operators

Aurelian Gheondea, Gelu Popescu

Journal:

Integral Equations and Operator Theory

Year:

2003

Language:

english

File:

PDF, 1.03 MB

english, 2003

11

On invariant maximal non-negative subspaces of certain operators acting in a Krein space

Aurelian Gheondea

Journal:

Integral Equations and Operator Theory

Year:

1989

Language:

english

File:

PDF, 279 KB

english, 1989

12

On the dynamics of a third order Newton's approximation method

Gheondea, Aurelian, Şamcı, Mehmet Emre

Journal:

Mathematische Nachrichten

Year:

2016

Language:

english

File:

PDF, 183 KB

english, 2016

13

Triplets of Closely Embedded Dirichlet Type Spaces on the Unit Polydisc

Petru Cojuhari, Aurelian Gheondea

Journal:

Complex Analysis and Operator Theory

Year:

2013

Language:

english

File:

PDF, 321 KB

english, 2013

14

Dilations of Some VH-Spaces Operator Valued Invariant Kernels

Aurelian Gheondea

Journal:

Integral Equations and Operator Theory

Year:

2012

Language:

english

File:

PDF, 372 KB

english, 2012

15

Representations of\(\varvec{*}\)-Semigroups Associated to Invariant Kernels with Values Continuously Adjointable Operators

Serdar Ay,Aurelian Gheondea

Journal:

Integral Equations and Operator Theory

Year:

2017

Language:

english

File:

PDF, 862 KB

english, 2017

16

Closely embedded Kreĭn spaces and applications to Dirac operators

Petru Cojuhari, Aurelian Gheondea

Journal:

Journal of Mathematical Analysis and Applications

Year:

2011

Language:

english

File:

PDF, 205 KB

english, 2011

17

On lifting of operators to Hilbert spaces induced by positive selfadjoint operators

Petru Cojuhari, Aurelian Gheondea

Journal:

Journal of Mathematical Analysis and Applications

Year:

2005

Language:

english

File:

PDF, 146 KB

english, 2005

18

A Trace Formula for Hankel Operators

Aurelian Gheondea and Raimund J. Ober

Journal:

Proceedings of the American Mathematical Society

Year:

1999

Language:

english

File:

PDF, 179 KB

english, 1999

19

Completely J -positive linear systems of finite order

Gheondea, Aurelian, Ober, Raimund J.

Journal:

Mathematische Nachrichten

Year:

1999

Language:

english

File:

PDF, 1.24 MB

english, 1999

20

Invariant Hermitian kernels and their Kolmogorov decompositions

Tiberiu Constantinescu, Aurelian Gheondea

Journal:

Comptes Rendus de l'Académie des Sciences - Series I - Mathematics

Year:

2000

File:

PDF, 150 KB

2000

21

On the Carathéodory type problem of M.G. Kren and H. Langer

Tiberiu Constantinescu, Aurelian Gheondea

Journal:

Comptes Rendus de l'Académie des Sciences - Series I - Mathematics

Year:

1998

Language:

english

File:

PDF, 376 KB

english, 1998

22

Corrigendum to âRepresentations of â-semigroups associated to invariant kernels with values adjointable operatorsâ [Linear Algebra Appl. 486 (2015) 361â388]

Ay, Serdar, Gheondea, Aurelian

Journal:

Linear Algebra and its Applications

Year:

2020

File:

PDF, 218 KB

2020

23

One-step completions of hermitian partial matrices with minimal negative signature

Aurelian Gheondea

Journal:

Linear Algebra and its Applications

Year:

1992

Language:

english

File:

PDF, 691 KB

english, 1992

24

On the infimum of quantum effects

Gheondea, Aurelian, Gudder, Stanley, Jonas, Peter

Journal:

Journal of Mathematical Physics

Year:

2005

Language:

english

File:

PDF, 369 KB

english, 2005

25

Symmetries Versus Conservation Laws in Dynamical Quantum Systems: A Unifying Approach Through Propagation of Fixed Points

Gheondea, Aurelian

Journal:

Annales Henri Poincaré

Year:

2018

Language:

english

File:

PDF, 654 KB

english, 2018

26

Comment on “A note on the infimum problem of Hilbert space effects” [J. Math. Phys. 47, 102103 (2006)]

Gheondea, Aurelian

Journal:

Journal of Mathematical Physics

Year:

2007

Language:

english

File:

PDF, 282 KB

english, 2007

27

Representations of Hermitian kernels by means of KreÄ n spaces

Constantinescu, Tiberiu, Gheondea, Aurelian

Journal:

Publications of the Research Institute for Mathematical Sciences

Year:

1997

File:

PDF, 3.81 MB

1997

28

Sequential Product of Quantum Effects

Aurelian Gheondea and Stanley Gudder

Journal:

Proceedings of the American Mathematical Society

Year:

2004

Language:

english

File:

PDF, 788 KB

english, 2004

29

Canonical forms of unbounded unitary operators in Kreĭ n spaces

Gheondea, Aurelian

Journal:

Publications of the Research Institute for Mathematical Sciences

Year:

1988

Language:

english

File:

PDF, 2.15 MB

english, 1988

30

Absolute continuity for operator valued completely positive maps on C[sup ∗]-algebras

Gheondea, Aurelian, Kavruk, Ali Şamil

Journal:

Journal of Mathematical Physics

Year:

2009

Language:

english

File:

PDF, 536 KB

english, 2009

31

An interpolation problem for completely positive maps on matrix algebras: solvability and parametrization

Ambrozie, Călin-Grigore, Gheondea, Aurelian

Journal:

Linear and Multilinear Algebra

Year:

2015

Language:

english

File:

PDF, 241 KB

english, 2015

32

On L. Schwartz's Boundedness Condition for Kernels

Tiberius Constantinescu, Aurelian Gheondea

Journal:

Year:

2006

Language:

english

File:

PDF, 274 KB

english, 2006

33

10.1090/s0002-9939-03-07063-1

Gheondea, Aurelian, Gudder, Stanley

Journal:

Proceedings of the American Mathematical Society

Year:

2004

Language:

english

File:

PDF, 181 KB

english, 2004

34

Closed embeddings of Hilbert spaces

Petru Cojuhari, Aurelian Gheondea

Journal:

Journal of Mathematical Analysis and Applications

Year:

2010

Language:

english

File:

PDF, 297 KB

english, 2010

35

The Schur Algorithm and Coefficient Characterizations for Generalized Schur Functions

Tiberiu Constantinescu and Aurelian Gheondea

Journal:

Proceedings of the American Mathematical Society

Year:

2000

Language:

english

File:

PDF, 241 KB

english, 2000

36

Pauli algebraic forms of normal and nonnormal operators

Tudor, Tiberiu, Gheondea, Aurelian

Journal:

Journal of the Optical Society of America A

Year:

2007

Language:

english

File:

PDF, 96 KB

english, 2007

37

On Singular Critical Points of Positive Operators in Krein Spaces

Branko Ćurgus, Aurelian Gheondea and Heinz Langer

Journal:

Proceedings of the American Mathematical Society

Year:

2000

Language:

english

File:

PDF, 192 KB

english, 2000

38

10.1090/s0002-9939-00-05375-2

Constantinescu, Tiberiu, Gheondea, Aurelian

Journal:

Proceedings of the American Mathematical Society

Year:

2000

Language:

english

File:

PDF, 184 KB

english, 2000

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