A result on the well posedness of the Cauchy problem for a class of hyperbolic operators with double characteristics
Milena Petrini (1995)
Rendiconti del Seminario Matematico della Università di Padova
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Milena Petrini (1995)
Rendiconti del Seminario Matematico della Università di Padova
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Nishitani, Tatsuo (2008)
Serdica Mathematical Journal
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2000 Mathematics Subject Classification: 35L15, Secondary 35L30. In this paper we prove that for non effectively hyperbolic operators with smooth double characteristics with the Hamilton map exhibiting a Jordan block of size 4 on the double characteristic manifold the Cauchy problem is well posed in the Gevrey 6 class if the strict Ivrii-Petkov-Hörmander condition is satisfied.
Drahoslava Janovská (2002)
Applications of Mathematics
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An algorithm for hyperbolic singular value decomposition of a given complex matrix based on hyperbolic Householder and Givens transformation matrices is described in detail. The main application of this algorithm is the decomposition of an updated correlation matrix.
H. Komatsu (1980-1981)
Séminaire Équations aux dérivées partielles (Polytechnique)
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N. Iwasaki (1985-1986)
Séminaire Équations aux dérivées partielles (Polytechnique)
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Hideo Yamahara (2000)
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Maria C. Carbinatto, Krzysztof P. Rybakowski (2007)
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Carvalho e Silva, Jaime (1988)
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