2021-12-06T19:03:21Zhttps://repository.dl.itc.u-tokyo.ac.jp/oaioai:repository.dl.itc.u-tokyo.ac.jp:000402262021-03-01T21:04:53ZSato-Kashiwara Determinant and Levi Conditions for SystemsD'Agnolo, Andrea138824415application/pdfWe prove that a second-microlocal version of the Sato-Kashiwara determinant computes the Newton polygon of determined systems of linear partial differential operators with constant multiplicities. Applications are given to the Cauchy problem for hyperbolic systems with regular singularities.departmental bulletin paperGraduate School of Mathematical Sciences, The University of Tokyo2000application/pdfJournal of mathematical sciences, the University of Tokyo37401422AA1102165313405705https://repository.dl.itc.u-tokyo.ac.jp/record/40226/files/jms070303.pdfeng