On Geršgorin-type problems and ovals of cassini
Electronic transactions on numerical analysis, Tome 8 (1999), pp. 15-20.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: Recently, two Ger$\check $sgorin-type matrix questions were raised. These are answered here, using ovals of Cassini.
Classification : 15A18
Keywords: ger$\check $sgorin circle theorem, ovals of Cassini
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     author = {Varga, Richard S. and Krautstengel, Alan},
     title = {On {Ger\v{s}gorin-type} problems and ovals of cassini},
     journal = {Electronic transactions on numerical analysis},
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     publisher = {mathdoc},
     volume = {8},
     year = {1999},
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Varga, Richard S.; Krautstengel, Alan. On Geršgorin-type problems and ovals of cassini. Electronic transactions on numerical analysis, Tome 8 (1999), pp. 15-20. http://geodesic.mathdoc.fr/item/ETNA_1999__8__a9/