Wang, Jing-rong Several sufficient conditions for the local solvability of linear PDO with multiple characteristics. (Chinese) Zbl 0513.47036 J. Lanzhou Univ., Nat. Sci. 1982, No. 2, 24-41 (1982). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 47F05 General theory of partial differential operators Keywords:Nirenberg-Treves condition; local solvability; linear partial; differential operators with multiple characteristics PDFBibTeX XMLCite \textit{J.-r. Wang}, J. Lanzhou Univ., Nat. Sci. 1982, No. 2, 24--41 (1982; Zbl 0513.47036)