Talks

• Vadym Adamyan: Asymptotic properties of systems of orthogonal entire functions generated by Hermite positive and Hermite indefinite functions
  Friday 10'10 (online)      Abstract
  
  
• Daniel Alpay: Hyper-positive functions and dissipativity
  Saturday 14'30      Abstract
  
  
• Jussi Behrndt: Spectral and perturbation theory for definitizable operators
  Saturday 9'00      Abstract
  
  
• Aad Dijksma: Self-adjoint coupling, Straus subspaces, and the equation W(z)P(z)=P(z)V
  Friday 11'20      Abstract
  
  
• Andreas Fleige: Positive and Negative Eigenfunction Expansion Results for Indefinite Sturm-Liouville Problems
  Friday 17'30      Abstract
  
  
• Aurelian Gheondea: On Singularity of Critical Points of Definitisable Operators
  Friday 12'00      Abstract
  
  
• Seppo Hassi: Unitary boundary pairs for isometric operators in Pontryagin spaces, generalized coresolvents, and Krein's formula
  Saturday 11'40      Abstract
  
  
• Michael Kaltenbäck: Heinz's theorem on definitizable selfadjoint operators on Krein spaces and beyond
  Friday 14'50      Abstract
  
  
• Bernd Kirstein: Heinz Langer and his relations to the Mathematical Institute of Leipzig University in the period 1980-2024
  Saturday 17'30 (online)      Abstract
  
  
• Matthias Langer: Asymptotic behaviour of N_κ^∞-functions
  Friday 15'30      Abstract
  
  
• Annemarie Luger: From Nevanlinna functions to quasi-Herglotz and beyond
  Saturday 15'10      Abstract
  
  
• Mark Malamud: Trace formulas for pairs of nonselfadjoint operators. Langer's contribution to the theory and its development.
  Saturday 9'40      Abstract
  
  
• Marco Marletta: Essential spectra of Maxwell systems and some remarks on analytic pencils
  Sunday 10'10      Abstract
  
  
• Manfred Möller: On continuous parameter dependence of roots of analytic functions
  Saturday 17'00 (online)      Abstract
  
  
• Zoltán Sasvári: On measurability and decomposition of functions with a finite number of negative squares. Two questions of Heinz Langer
  Sunday 9'30      Abstract
  
  
• Henk de Snoo: The Langer-Textorius paper, almost fifty years ago
  Saturday 11'00      Abstract
  
  
• Franciszek Szafraniec: Reproducing property in the indefinite environment
  Saturday 16'30 (online)      Abstract
  
  
• Christiane Tretter: Spectral bounds for damped systems
  Friday 9'30      Abstract
  
  
• Kresimir Veselic: Optimising damped systems
  Friday 16'50      Abstract
  
  
• Henrik Winkler: Canonical systems of differential equations on star-like graphs
  Sunday 12'10      Abstract
  
  
• Harald Woracek: Indefinite canonical systems and applications
  Sunday 11'30      Abstract