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- W2000970266 abstract "Local variational min-sup characterizations are presented for the real spectrum of a selfadjoint operator pencil. Instead of minimizing over all subspaces of fixed codimension as in the classical result, the new characterizations minimize over subspaces that are close to extremal subspaces. In this way, the entire real spectrum, including continuous spectrum, can be characterized." @default.
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- W2000970266 date "1992-01-01" @default.
- W2000970266 modified "2023-10-16" @default.
- W2000970266 title "Some general local variational principles" @default.
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- W2000970266 doi "https://doi.org/10.1090/s0002-9939-1992-1072084-7" @default.
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