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Heinz Langer

TU Wien(AT)

Publications by Year

Research Areas

Spectral Theory in Mathematical Physics, Matrix Theory and Algorithms, Advanced Mathematical Modeling in Engineering, Holomorphic and Operator Theory, Numerical methods in inverse problems

Most-Cited Works

→ Introduction to the Spectral Theory of Operators in Spaces with an Indefinite Metric(1982)317 cited
→ Über einige Fortsetzungsprobleme, die eng mit der Theorie hermitescher Operatoren im Raume II_x zusammenhängen. I. Einige Funktionenklassen und ihre Darstellungen(1977)276 cited
→ Spectral functions of definitizable operators in Krein spaces(1982)224 cited
→ The Essential Spectrum of Some Matrix Operators(1994)204 cited
→ On generalized resolvents andQ-functions of symmetric linear relations (subspaces) in Hilbert space(1977)195 cited
→ A Krein space approach to symmetric ordinary differential operators with an indefinite weight function(1989)150 cited

→ A Krein Space Approach to PT-symmetry(2004)

139 cited

→ On some mathematical principles in the linear theory of damped oscillations of continua I(1978)124 cited

→ Eigenvalues and Pole Functions of Hamiltonian Systems with Eigenvalue Depending Boundary Conditions(1993)90 cited

→ A factorization result for generalized Nevanlinna functions of the classN k(2000)72 cited