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Seppo Hassi

Professor

University of Vaasa

Finland

Research Interests

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Professors in Finland

Articles (13)

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2026

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2026

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2025

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2025

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2025

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2022

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2022

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2021

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2021

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2020

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2020

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2020

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2020

Collaborators (2)

Jussi Behrndt

Graz University of Technology

AUSTRIA

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Fritz Gesztesy

Professor

Baylor University

UNITED STATES

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Seppo Hassi

Research Interests

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Articles (13)

On sesquilinear forms for lower semibounded (singular) Sturm–Liouville operators

AN EXTENSION AND REFINEMENT OF THE THEOREMS OF DOUGLAS AND SEBESTYEN FOR UNBOUNDED OPERATORS

Representing maps for semibounded forms and their Lebesgue‐type decompositions

Ando's Lebesgue-Type Decompositions for Pairs of Positive Operators

Local Spectral Theory for Unbounded Product of Nonnegative Selfadjoint Operators

Generalized boundary triples, II. Some applications of generalized boundary triples and form domain invariant Nevanlinna functions

Lebesgue type decompositions and Radon–Nikodym derivatives for pairs of bounded linear operators

REPRESENTATIONS OF CLOSED QUADRATIC FORMS ASSOCIATED WITH STIELTJES AND INVERSE STIELTJES HOLOMORPHIC FAMILIES OF LINEAR RELATIONS

Unitary Boundary Pairs for Isometric Operators in Pontryagin Spaces and Generalized Coresolvents

Generalized boundary triples, I. Some classes of isometric and unitary boundary pairs and realization problems for subclasses of Nevanlinna functions

Operational calculus for rows, columns, and blocks of linear relations

SELFADJOINT EXTENSIONS OF RELATIONS WHOSE DOMAIN AND RANGE ARE ORTHOGONAL

Stieltjes and inverse Stieltjes holomorphic families of linear relations and their representations

Collaborators (2)

Jussi Behrndt

Fritz Gesztesy

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