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An algorithm for Lagrangian subspaces
Hansen, Sönke
In: Linear algebra and its applications, Jg. 1990, S. 155-176
The leading singularity of the scattering kernel for a transparent obstacle
Hansen, Sönke
In: Mathematische Annalen, Jg. 1987, S. 125-139
Localizable analytically uniform spaces and the fundamental principle
Hansen, Sönke
In: Transactions of the American Mathematical Society, Jg. 1981, S. 235-250
On the "Fundamental Principle" of L. Ehrenpreis
Hansen, Sönke
In: Partial differential equations : papers presented at Stefan Banach International Math. Center at the semester "Partial differential equations" held Sept. 11 - Dec. 16, 1978 (Banach Center publications : 10), Jg. 1983, S. 185-201
Propagation of discontinuities in wave fields
Hansen, Sönke
In: Proceedings on "Model Optimization in Exploration Geophysics" (6th International Seminar, Berlin, February 1988), Jg. 1989, S. 31-39
Singularities of transmission problems
Hansen, Sönke
In: Mathematische Annalen, Jg. 1984, S. 233-253
Solution of a hyperbolic inverse problem by linearization
Hansen, Sönke
In: Communications in Partial Differential Equations, Jg. 1991, S. 291-309
Traveltimes in common midpoint sections of anisotropic media
Hansen, Sönke
In: Soviet Geology and Geophysics, Jg. 1991, S. 120-126
Uniqueness of the Cauchy problem for convolution equations
Hansen, Sönke
In: Journal für die reine und angewandte Mathematik, Jg. 1980, S. 1-15

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