共 50 条
- [2] Hypoellipticity and well-posedness of the Cauchy problem for a class of degenerate elliptic operators [J]. BOLLETTINO DELLA UNIONE MATEMATICA ITALIANA, 2001, 4A (03): : 511 - 514
- [3] Global Hypoellipticity for a Class of Pseudo-differential Operators on the Torus [J]. Journal of Fourier Analysis and Applications, 2019, 25 : 1717 - 1758
- [5] ON THE HYPOELLIPTICITY OF DIFFERENTIAL-OPERATORS IN THE CLASS OF GENERALIZED PERIODIC-FUNCTIONS [J]. DOKLADY AKADEMII NAUK SSSR, 1982, 266 (03): : 565 - 568
- [6] GLOBAL HYPOELLIPTICITY OF A CLASS OF 2ND-ORDER OPERATORS [J]. CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, 1994, 37 (03): : 301 - 305
- [9] Hypoellipticity for a class of operators with multiple characteristics [J]. Journal d'Analyse Mathématique, 2007, 103 : 377 - 396
- [10] Hypoellipticity for a class of operators with multiple characteristics [J]. JOURNAL D ANALYSE MATHEMATIQUE, 2007, 103 (1): : 377 - 396