Author: Kratz, Werner
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Kratz, Werner:
Sturm-Liouville difference equations and banded matrices.
(English).
Archivum Mathematicum,
vol. 36
(2000),
issue 5,
pp. 499-505
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Kratz, Werner:
Quadratic functionals: positivity, oscillation, Rayleigh's principle.
(English).
Archivum Mathematicum,
vol. 34
(1998),
issue 1,
pp. 143-151
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