Henk de Snoo

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All published works

Action	Title	Year	Authors
+ PDF Chat	Weak coupling and spectral instability for Neumann Laplacians	2024	Jussi Behrndt Fritz Gesztesy Henk de Snoo
+ PDF Chat	Weak Coupling and Spectral Instability for Neumann Laplacians	2024	Jussi Behrndt Fritz Gesztesy Henk de Snoo
+ PDF Chat	A Jordan-like decomposition for linear relations in finite-dimensional spaces	2024	Thomas Berger Henk de Snoo Carsten Trunk Henrik Winkler
+ PDF Chat	Friedrichs and Kre\u{\i}n type extensions in terms of representing maps	2024	Seppo Hassi Henk de Snoo
+	Sequences of operators, monotone in the sense of contractive domination	2024	Seppo Hassi Henk de Snoo
+	Representing maps for semibounded forms and their Lebesgue type decompositions	2024	Seppo Hassi Henk de Snoo
+	Complementation and Lebesgue type decompositions of linear operators and relations	2023	Seppo Hassi Henk de Snoo
+ PDF Chat	Lebesgue type decompositions and Radon–Nikodym derivatives for pairs of bounded linear operators	2022	Seppo Hassi Henk de Snoo
+	A Jordan-like decomposition for linear relations in finite-dimensional spaces	2022	Thomas Berger Henk de Snoo Carsten Trunk Henrik Winkler
+ PDF Chat	Linear relations and their singular chains	2021	Thomas Berger Henk de Snoo Carsten Trunk Henrik Winkler
+	Lebesgue type decompositions and Radon-Nikodym derivatives for pairs of bounded linear operators	2021	Seppo Hassi Henk de Snoo
+ PDF Chat	Operational calculus for rows, columns, and blocks of linear relations	2020	Seppo Hassi Jean-Philippe Labrousse Henk de Snoo
+	Operational calculus for rows, columns, and blocks of linear relations	2020	Seppo Hassi Jean-Philippe Labrousse Henk de Snoo
+ PDF Chat	Mathematical work of Franciszek Hugon Szafraniec and its impacts	2020	Raúl E. Curto Jean‐Pierre Gazeau A. Horzela Mohammad Sal Moslehian Mihai Putinar Konrad Schmüdgen Henk de Snoo Jan Stochel
+ PDF Chat	Schrödinger Operators on Bounded Domains	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Spectra, Simple Operators, and Weyl Functions	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Boundary Triplets and Weyl Functions	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Boundary Triplets and Boundary Pairs for Semibounded Relations	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Canonical Systems of Differential Equations	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Sturm-Liouville Operators	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Boundary Value Problems, Weyl Functions, and Differential Operators	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Operator Models for Nevanlinna Functions	2020	Jussi Behrndt Seppo Hassi Henk de Snoo
+	Linear relations and their singular chains	2020	Thomas Berger Henk de Snoo Carsten Trunk Henrik Winkler
+	A class of sectorial relations and the associated closed forms.	2019	Seppo Hassi Henk de Snoo
+	Selfadjoint extensions of relations whose domain and range are orthogonal	2019	Seppo Hassi Jean-Philippe Labrousse Henk de Snoo
+ PDF Chat	Factorized sectorial relations, their maximal-sectorial extensions, and form sums	2019	Seppo Hassi Adrian Sandovici Henk de Snoo
+	Factorized sectorial relations, their maximal-sectorial extensions, and form sums	2019	Seppo Hassi Adrian Sandovici Henk de Snoo
+	Factorized sectorial relations, their maximal sectorial extensions, and form sums	2019	Seppo Hassi Adrian Sandovici Henk de Snoo
+	A class of sectorial relations and the associated closed forms	2019	Seppo Hassi Henk de Snoo
+	Selfadjoint extensions of relations whose domain and range are orthogonal	2019	Seppo Hassi Jean-Philippe Labrousse Henk de Snoo
+	Factorized sectorial relations, their maximal sectorial extensions, and form sums	2019	Seppo Hassi Adrian Sandovici Henk de Snoo
+ PDF Chat	Lebesgue type decompositions for linear relations and Ando’s uniqueness criterion	2018	Seppo Hassi Zoltán Sebestyén Henk de Snoo
+	Lebesgue type decompositions for linear relations and Ando's uniqueness criterion	2018	Seppo Hassi Zoltán Sebestyén Henk de Snoo
+	Limit Properties of Eigenvalues in Spectral Gaps	2018	Seppo Hassi Henk de Snoo Henrik Winkler
+	Compressed Resolvents, Q-functions and h 0-resolvents in Almost Pontryagin Spaces	2018	Henk de Snoo Harald Woracek
+	Lebesgue type decompositions for linear relations and Ando's uniqueness criterion	2018	Seppo Hassi Zoltán Sebestyén Henk de Snoo
+	The Krein formula in almost Pontryagin spaces. A proof via orthogonal coupling	2017	Henk de Snoo Harald Woracek
+ PDF Chat	Limit‐point/limit‐circle classification for Hain–Lüst type equations	2017	Seppo Hassi Manfred Möller Henk de Snoo
+	Restriction and Factorization for Isometric and Symmetric Operators in Almost Pontryagin Spaces	2016	Henk de Snoo Harald Woracek
+ PDF Chat	Non-semi-bounded closed symmetric forms associated with a generalized Friedrichs extension	2014	Henk de Snoo Andreas Fleige Seppo Hassi Henrik Winkler
+	Antitonicity of the inverse for selfadjoint matrices, operators, and relations	2014	Jussi Behrndt Seppo Hassi Hendrik Luit Wietsma Henk de Snoo
+	Global and local behavior of zeros of nonpositive type	2014	Henk de Snoo Henrik Winkler Michał Wojtylak
+	Factorization, majorization, and domination for linear relations	2014	Seppo Hassi Henk de Snoo
+	Global and local behavior of zeros of nonpositive type	2013	Henk de Snoo Henrik Winkler Michał Wojtylak
+	Global and local behavior of zeros of nonpositive type	2013	Henk de Snoo Henrik Winkler Michał Wojtylak
+	Preface	2012	Seppo Hassi Henk de Snoo Franek Szafraniec
+ PDF Chat	Truncated moment problems in the class of generalized Nevanlinna functions	2012	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Sums, couplings, and completions of almost Pontryagin spaces	2012	Henk de Snoo Harald Woracek
+	Linear fractional transformations of Stieltjes functions	2011	Jussi Behrndt Seppo Hassi Henk de Snoo Rudi Wietsma Henrik Winkler
+	Limit properties of monotone matrix functions	2011	Jussi Behrndt Seppo Hassi Henk de Snoo Rudi Wietsma
+ PDF Chat	Linear Fractional Transformations of Nevanlinna Functions Associated with a Nonnegative Operator	2011	Jussi Behrndt Seppo Hassi Henk de Snoo Rudi Wietsma Henrik Winkler
+ PDF Chat	Square‐integrable solutions and Weyl functions for singular canonical systems	2011	Jussi Behrndt Seppo Hassi Henk de Snoo Rudi Wietsma
+	Zeros of nonpositive type of generalized Nevanlinna functions with one negative square	2011	Henk de Snoo Henrik Winkler Michał Wojtylak
+	Truncated moment problems in the class of generalized Nevanlinna functions	2011	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Truncated moment problems in the class of generalized Nevanlinna functions	2010	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Monotone convergence theorems for semi-bounded operators and forms with applications	2010	Jussi Behrndt Seppo Hassi Henk de Snoo Rudi Wietsma
+	Sesquilinear forms corresponding to a non-semibounded Sturm–Liouville operator	2010	Andreas Fleige Seppo Hassi Henk de Snoo Henrik Winkler
+	Problem 1.2 The realization problem for Herglotz-Nevanlinna functions	2009	Seppo Hassi Henk de Snoo Eduard Tsekanovskĭ
+ PDF Chat	Lebesgue type decompositions for nonnegative forms	2009	Seppo Hassi Zoltán Sebestyén Henk de Snoo
+	An index formula for the product of linear relations	2009	Adrian Sandovici Henk de Snoo
+ PDF Chat	Boundary relations and generalized resolvents of symmetric operators	2009	Volodymyr Derkach Seppo Hassi M. M. Malamud Henk de Snoo
+	Domain and Range Descriptions for Adjoint Relations, and Parallel Sums and Differences of Forms	2009	Seppo Hassi Zoltán Sebestyén Henk de Snoo
+	On Kreĭn’s formula	2009	Jussi Behrndt Henk de Snoo
+	On Kreĭn's formula	2008	Jussi Behrndt Henk de Snoo
+	Boundary Relations, Unitary Colligations, and Functional Models	2008	Jussi Behrndt Seppo Hassi Henk de Snoo
+	One-dimensional Perturbations, Asymptotic Expansions, and Spectral Gaps	2008	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler
+	Functional models for Nevanlinna families	2008	Jussi Behrndt Seppo Hassi Henk de Snoo
+ PDF Chat	Extremal extensions for the sum of nonnegative selfadjoint relations	2007	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler
+	Ascent, descent, nullity, defect, and related notions for linear relations in linear spaces	2007	Adrian Sandovici Henk de Snoo Henrik Winkler
+	A general factorization approach to the extension theory of nonnegative operators and relations	2007	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler
+	On Exceptional Extensions Close to the Generalized Friedrichs Extension of Symmetric Operators	2007	Seppo Hassi Henk de Snoo Henrik Winkler
+ PDF Chat	Asymptotic Expansions of Generalized Nevanlinna Functions and their Spectral Properties	2007	Vladimir Derkach Seppo Hassi Henk de Snoo
+ PDF Chat	Boundary relations and their Weyl families	2006	Vladimir Derkach Seppo Hassi M. M. Malamud Henk S. V. de Snoo
+	A general realization theorem for matrix-valued Herglotz–Nevanlinna functions	2006	Sergey Belyi Seppo Hassi Henk de Snoo Eduard Tsekanovskiiˇ
+	A class of Nevanlinna functions related to singular Sturm-Liouville problems	2006	Seppo Hassi Manfred Möller Henk de Snoo
+	Form sums of nonnegative selfadjoint operators	2006	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler
+	Operator Theory in Krein Spaces and Nonlinear Eigenvalue Problems	2006	Vladimir Derkach Seppo Hassi Henk de Snoo
+	On the nonnegativity of operator products	2005	Seppo Hassi Zoltán Sebestyén Henk de Snoo
+	Canonical systems of differential equations with self-adjoint interface conditions on graphs	2005	Henk de Snoo Henrik Winkler
+	Generalized Friedrichs Extensions Associated with Interface Conditions for Sturm-Liouville Operators	2005	Andreas Fleige Seppo Hassi Henk de Snoo Henrik Winkler
+	A Factorization Model for the Generalized Friedrichs Extension in a Pontryagin Space	2005	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Two-Dimensional Trace-Normed Canonical Systems of Differential Equations and Selfadjoint Interface Conditions	2005	Henk de Snoo Henrik Winkler
+	Q-functions of Quasi-selfadjoint Contractions	2005	Yury Arlinskii̇̆ Seppo Hassi Henk de Snoo
+	A general realization theorem for matrix-valued Herglotz-Nevanlinna functions	2005	Sergey Belyi Seppo Hassi Henk de Snoo Eduard Tsekanovskiı̆
+	The structure of linear relations in Euclidean spaces	2004	Adrian Sandovici Henk de Snoo Henrik Winkler
+ PDF Chat	On Kreĭn's extension theory of nonnegative operators	2004	Seppo Hassi M. M. Malamud Henk de Snoo
+	Singular Sturm–Liouville problems whose coefficients depend rationally on the eigenvalue parameter	2004	Seppo Hassi Manfred Möller Henk de Snoo
+ PDF Chat	Singular Perturbations as Range Perturbations in a Pontryagin Space	2004	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Sturm–Liouville operators and their spectral functions	2003	Seppo Hassi Manfred Möller Henk de Snoo
+ PDF Chat	Singular Perturbations of Self-Adjoint Operators	2003	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Rank One Perturbations in a Pontryagin Space with One Negative Square	2002	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Realizations of Herglotz-Nevanlinna Functions via F-systems	2002	Seppo Hassi Henk de Snoo Eduard Tsekanovskiı̆
+	Singular perturbations of selfadjoint operators	2002	Vladimir Derkach Seppo Hassi Henk de Snoo
+	An addendum to the multiplication and factorization theorems of brodskiǐ—livšic—potapov	2001	Seppo Hassi Henk de Snoo Eduard Tsekanovskiı̆
+	Commutative and noncommutative representations of matrix-valued herglotz-nevanlinna functions	2001	Seppo Hassi Henk de Snoo Eduard Tsekanovskiı̆
+	Generalized Nevanlinna Functions with Polynomial Asymptotic Behaviour at Infinity and Regular Perturbations	2001	Vladimir Derkach Seppo Hassi Henk de Snoo
+	Boundary-value problems for two-dimensional canonical systems	2000	Seppo Hassi Henk de Snoo Henrik Winkler
+	Subordinate solutions and spectral measures of canonical systems	2000	Seppo Hassi Christian Remling Henk de Snoo
+	Some interpolation problems of Nevanlinna-Pick type. The Kreĭn-Langer method	1998	Seppo Hassi Henk de Snoo Harald Woracek
+	Selfadjoint extensions of the orthogonal sum of symmetric relations, II	1998	Seppo Hassi Michael Kaltenbäck Henk de Snoo
+ PDF Chat	Smooth rank one perturbations of selfadjoint operators	1998	Seppo Hassi Henk de Snoo A. Willemsma
+ PDF Chat	Nevanlinna Functions, Perturbation Formulas, and Triplets of Hilbert Spaces	1998	Seppo Hassi Henk de Snoo
+	On rank one perturbations of selfadjoint operators	1997	Seppo Hassi Henk de Snoo
+	One-dimensional graph perturbations of selfadjoint relations	1997	Seppo Hassi Henk de Snoo
+ PDF Chat	A characterization of semibounded selfadjoint operators	1997	Seppo Hassi Michael Kaltenbäck Henk de Snoo
+	I Integral Equations and Operator Theory	1997	Seppo Hassi Henk de Snoo
+	On Some Operator Colligations and Associated Reproducing Kernel Pontryagin Spaces	1996	Daniel Alpay Vladimir Bolotnikov Aad Dijksma Henk de Snoo
+	Regular Sturm ‐ Liouville Problems Whose Coefficients Depend Rationally on the Eigenvalue Parameter	1996	Henk de Snoo
+	On Some Operator Colligations and Associated Reproducing Kernel Hilbert Spaces	1993	Daniel Alpay Vladimir Bolotnikov Aad Dijksma Henk de Snoo
+	Eigenvalues and Pole Functions of Hamiltonian Systems with Eigenvalue Depending Boundary Conditions	1993	Aad Dijksma Heinz Langer Henk de Snoo
+	The Commutant Lifting Theorem for Contractions on Kreĭn Spaces	1993	Aad Dijksma Michael A. Dritschel Stefania Marcantognini Henk de Snoo
+	Interpolation problems, extensions of symmetric operators and reproducing kernel spaces II	1992	Daniel Alpay Piet Bruinsma Aad Dijksma Henk de Snoo
+	Interpolation problems, extensions of symmetric operators and reproducing kernel spaces II	1991	Daniel Alpay Piet Bruinsma Aad Dijksma Henk de Snoo
+	Characteristic Functions of Unitary Colligations and of Bounded Operators in Krein Spaces	1989	Branko Ćurgus Aad Dijksma Heinz Langer Henk de Snoo
+	Unitary Dilations of Contractions In κκ -Spaces	1988	Piet Bruinsma Aad Dijksma Henk de Snoo
+	Hamiltonian Systems with Eigenvalue Depending Boundary Conditions	1988	Aad Dijksma Heinz Langer Henk de Snoo
+	Unitary colligations in Krein spaces and their role in the extension theory of isometries and symmetric linear relations in Hilbert spaces	1987	Aad Dijksma Heinz Langer Henk de Snoo

Common Coauthors

Coauthor	Papers Together
Seppo Hassi	84
Henrik Winkler	24
Jussi Behrndt	20
Vladimir Derkach	12
Adrian Sandovici	11
Aad Dijksma	10
Zoltán Sebestyén	5
Harald Woracek	5
Rudi Wietsma	5
Carsten Trunk	4
Jean-Philippe Labrousse	4
Heinz Langer	4
Daniel Alpay	4
Manfred Möller	4
Michał Wojtylak	4
Eduard Tsekanovskiı̆	4
Thomas Berger	4
Andreas Fleige	3
M. M. Malamud	3
Piet Bruinsma	3
Michael Kaltenbäck	2
Fritz Gesztesy	2
Vladimir Bolotnikov	2
Sergey Belyi	2
Mihai Putinar	1
Raúl E. Curto	1
Jan Stochel	1
Branko Ćurgus	1
Christian Remling	1
Stefania Marcantognini	1
Eduard Tsekanovskĭ	1
Michael A. Dritschel	1
Volodymyr Derkach	1
Zoltán Sebestyén	1
Konrad Schmüdgen	1
Franek Szafraniec	1
A. Horzela	1
Hendrik Luit Wietsma	1
Yury Arlinskiı̆	1
Eduard Tsekanovskiiˇ	1
A. Willemsma	1
Mohammad Sal Moslehian	1
Jean‐Pierre Gazeau	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	The extension theory of Hermitian operators and the moment problem	1995	Volodymyr Derkach M. M. Malamud	23
+	Generalized resolvents and the boundary value problems for Hermitian operators with gaps	1991	Volodymyr Derkach M. M. Malamud	18
+ PDF Chat	Perturbation Theory for Linear Operators	1995	Tosio Kato	16
+ PDF Chat	On generalized resolvents and<i>Q</i>-functions of symmetric linear relations (subspaces) in Hilbert space	1977	Heinz Langer Björn Textorius	16
+	Über einige Fortsetzungsprobleme, die eng mit der Theorie hermitescher Operatoren im Raume <i>II</i><sub>x</sub> zusammenhängen. I. Einige Funktionenklassen und ihre Darstellungen	1977	M. Г. Крейн Heinz Langer	14
+ PDF Chat	Operational calculus of linear relations	1961	Richard Arens	13
+	Harmonic Analysis of Operators on Hilbert Space	1970	Béla Szõkefalvi-Nagy Ciprian Foiaş Hari Bercovici László Kérchy	12
+	Positive selfadjoint extensions of positive symmetric subspaces	1978	Earl A. Coddington H. S. V. de Snoo	12
+	A Characterization of Generalized Zeros of Negative Type of Functions of the Class Nκ	1986	Heinz Langer	11
+	On the class of extremal extensions of a nonnegative operator	2001	Yu. M. Arlinskiĭ Seppo Hassi Zoltán Sebestyén H. S. V. de Snoo	11
+	Boundary Value Problems for Operator Differential Equations	1991	В. И. Горбачук М. Л. Горбачук	11
+ PDF Chat	Positive selfadjoint extensions of positive symmetric operators	1970	Tsuyoshi Andô Katsuyoshi Nishio	11
+ PDF Chat	Boundary relations and their Weyl families	2006	Vladimir Derkach Seppo Hassi M. M. Malamud Henk S. V. de Snoo	11
+	<i>Discrete and Continuous Boundary Problems</i>	1964	F. V. Atkinson George H. Weiss	10
+	One-dimensional graph perturbations of selfadjoint relations	1997	Seppo Hassi Henk de Snoo	10
+	Rank One Perturbations at Infinite Coupling	1995	Fritz Gesztesy Barry Simon	9
+	On operator ranges	1971	Peter Fillmore J. P. Williams	9
+	A factorization result for generalized Nevanlinna functions of the classN k	2000	Aad Dijksma Heinz Langer Annemarie Luger Yu. G. Shondin	9
+ PDF Chat	Smooth rank one perturbations of selfadjoint operators	1998	Seppo Hassi Henk de Snoo A. Willemsma	9
+	Triangular and Jordan representations of linear operators	1971	M. S. Brodskiĭ	8
+	Rank One Perturbations with Infinitesimal Coupling	1995	Alexander Kiselev Barry Simon	8
+ PDF Chat	On Kreĭn's extension theory of nonnegative operators	2004	Seppo Hassi M. M. Malamud Henk de Snoo	8
+ PDF Chat	Componentwise and Cartesian decompositions of linear relations	2009	Seppo Hassi H. S. V. de Snoo Franciszek Hugon Szafraniec	8
+	Form sums of nonnegative selfadjoint operators	2006	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler	8
+ PDF Chat	Nevanlinna Functions, Perturbation Formulas, and Triplets of Hilbert Spaces	1998	Seppo Hassi Henk de Snoo	8
+	Rank One Perturbations in a Pontryagin Space with One Negative Square	2002	Vladimir Derkach Seppo Hassi Henk de Snoo	8
+	Introduction to the Spectral Theory of Operators in Spaces with an Indefinite Metric	1982	I. S. Iohvidov M. Г. Крейн Heinz Langer	8
+ PDF Chat	On majorization, factorization, and range inclusion of operators on Hilbert space	1966	R. G. Douglas	7
+	Eigenfunction expansions associated with second-order differential equations	1946	E. C. Titchmarsh	7
+	A general factorization approach to the extension theory of nonnegative operators and relations	2007	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler	7
+	Boundary-value problems for two-dimensional canonical systems	2000	Seppo Hassi Henk de Snoo Henrik Winkler	7
+	A canonical decomposition for quadratic forms with applications to monotone convergence theorems	1978	Barry Simon	7
+	Spectral analysis of rank one perturbations and applications	1995	Barry Simon	7
+ PDF Chat	A canonical decomposition for linear operators and linear relations	2007	Seppo Hassi Zoltán Sebestyén H. S. V. de Snoo Franciszek Hugon Szafraniec	7
+	THE THEORY OF BI-EXTENSIONS OF OPERATORS ON RIGGED HILBERT SPACES. UNBOUNDED OPERATOR COLLIGATIONS AND CHARACTERISTIC FUNCTIONS	1977	Eduard Tsekanovskiı̆ Yu. L. Shmul’yan	6
+ PDF Chat	Extremal extensions for the sum of nonnegative selfadjoint relations	2007	Seppo Hassi Adrian Sandovici Henk de Snoo Henrik Winkler	6
+ PDF Chat	Some Hilbert spaces of entire functions	1960	Louis de Branges	6
+ PDF Chat	On Matrix-Valued Herglotz Functions	2000	Fritz Gesztesy Eduard Tsekanovskiı̆	6
+	EXTENSIONS AND GENERALIZED RESOLVENTS OF A SYMMETRIC OPERATOR WHICH IS NOT DENSELY DEFINED	1970	A V Štraus	6
+	Square summable power series	1966	Louis de Branges James Rovnyak	6
+	Monotone convergence theorems for semi-bounded operators and forms with applications	2010	Jussi Behrndt Seppo Hassi Henk de Snoo Rudi Wietsma	6
+	Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces	1997	Daniel Alpay Aad Dijksma James Rovnyak Hendrik de Snoo	6
+ PDF Chat	Some Applications of Operator-valued Herglotz Functions	2001	Fritz Gesztesy N. J. Kalton Konstantin A. Makarov Eduard Tsekanovskiı̆	6
+	N. I. Achieser und I. M. Glasmann, Theorie der linearen Operatoren im Hilbert‐Raum. (Mathematische Lehrbücher und Monographien, Band IV) XIII + 369 S. Berlin 1965. Akademie‐Verlag. Preis geb. MDN 28,–	1966	K. P. Hadeler	6
+	Triangular and Jordan Representations of Linear Operators	2006	M. Brodskii	6
+	Spectral functions of definitizable operators in Krein spaces	1982	Heinz Langer	5
+ PDF Chat	Lebesgue type decompositions for nonnegative forms	2009	Seppo Hassi Zoltán Sebestyén Henk de Snoo	5
+	On Titchmarsh-Weyl M(λ)-functions for linear Hamiltonian systems	1981	Don Hinton J. K. Shaw	5
+ PDF Chat	Self-adjoint extensions of symmetric subspaces	1974	Aad Dijksma Hendrik de Snoo	5
+	Methods of Modern Mathematical Physics	1972	Michael C. Reed Barry Simon	5