Observations on degenerate saddle point
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Andrew V. Knyazev
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Article
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2007
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Elsevier Science
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English
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We investigate degenerate saddle point problems, which can be viewed as limit cases of standard mixed formulations of symmetric problems with large jumps in coefficients. We prove that they are well-posed in a standard norm despite the degeneracy. By wellposedness, we mean a stable dependence of the