H. Langer – författare

Differential Operators and Related Topics

Proceedings of the Mark Krein International Conference on Operator Theory and Applications, Odessa, Ukraine, August 18–22, 1997 Volume I

Operator Theory and Related Topics

Proceedings of the Mark Krein International Conference on Operator Theory and Applications, Odessa, Ukraine, August 18–22, 1997 Volume II

Operator Theory and Boundary Eigenvalue Problems

International Workshop in Vienna, July 27–30, 1993

Introduction to the Spectral Theory of Operators in Spaces with an Indefinite Metric