CRYSTAL-CHEMICAL FEATURES OF MONOCLINIC LANTHANIDE OXOBROMOTUNGSTATES OF COMPOSITION LNWO4BR (LN = EU, GD, DY, ER, YB)
Russian Journal of Inorganic Chemistry. IAPC Nauka/Interperiodica. Том 51. 2006. С. 960-963
The central result is a theorem on the solubility on compact subsets for differential equations of quasiprincipal type with real principal pencil of symbols. The proof is based on the analysis of the microlocal structure of the singularities of solutions of equations in this class. © 2006 RAS(DoM) and LMS.