LEADER 02819nmm a2200421 i 4500 001 991003324949707536 007 cr cn ---mpcbr 008 170207s2014 sz | o j |||| 0|eng d 020 $a9783319022734 (ebook) 024 7 $a10.1007/978-3-319-02273-4$2doi 035 $ab14316171-39ule_inst 040 $aBibl. Dip.le Aggr. Matematica e Fisica - Sez. Matematica$beng 082 04$a515.353$223 084 $aAMS 35L45 084 $aAMS 35L40 084 $aAMS 35L55 100 1 $aNishitani, Tatsuo$059540 245 10$aHyperbolic Systems with Analytic Coefficients$h[e-book] :$bWell-posedness of the Cauchy Problem /$cby Tatsuo Nishitani 260 $aCham :$bSpringer Intern. Publ.,$c2014 300 $a1 online resource (viii, 237 p.) 336 $atext$btxt$2rdacontent 337 $acomputer$bc$2rdamedia 338 $aonline resource$bcr$2rdacarrier 347 $atext file$bPDF$2rda 490 1 $aLecture Notes in Mathematics,$x1617-9692 ;$v2097 505 0 $aIntroduction ; Necessary conditions for strong hyperbolicity ; Two by two systems with two independent variables ; Systems with nondegenerate characteristics ; Index 520 $aThis monograph focuses on the well-posedness of the Cauchy problem for linear hyperbolic systems with matrix coefficients. Mainly two questions are discussed: (A) Under which conditions on lower order terms is the Cauchy problem well posed? (B) When is the Cauchy problem well posed for any lower order term? For first order two by two systems with two independent variables with real analytic coefficients, we present complete answers for both (A) and (B). For first order systems with real analytic coefficients we prove general necessary conditions for question (B) in terms of minors of the principal symbols. With regard to sufficient conditions for (B), we introduce hyperbolic systems with nondegenerate characteristics, which contains strictly hyperbolic systems, and prove that the Cauchy problem for hyperbolic systems with nondegenerate characteristics is well posed for any lower order term. We also prove that any hyperbolic system which is close to a hyperbolic system with a nondegenerate characteristic of multiple order has a nondegenerate characteristic of the same order nearby 650 0$aDifferential equations, partial 650 0$aMathematical physics 710 2 $aSpringerLink (Online service) 773 0 $aSpringer eBooks. 776 08$aPrinted edition:$z9783319022727. 856 40$uhttp://link.springer.com/book/10.1007/978-3-319-02273-4$zAn electronic book accessible through the World Wide 907 $a.b14316171$b03-03-22$c07-02-17 912 $a991003324949707536 996 $aHyperbolic systems with analytic coefficients$9820703 997 $aUNISALENTO 998 $ale013$b07-02-17$cm$d@ $e-$feng$gsz $h0$i0