共 50 条
- [1] REGULARITY OF A CLASS OF SECOND ORDER DEGENERATE ELLIPTICAL OPERATORS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1969, 268 (20): : 1177 - &
- [3] A GENERALIZATION OF MORSE INDEX THEOREM TO A CLASS OF DEGENERATE ELLIPTIC OPERATORS JOURNAL OF MATHEMATICS AND MECHANICS, 1969, 19 (01): : 37 - &
- [4] A GENERALIZATION OF MORSE INDEX THEOREM TO A CLASS OF DEGENERATE ELLIPTIC OPERATORS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1969, 16 (01): : 193 - &
- [5] CLASS OF DEGENERATE ELLIPTICAL OPERATORS WITH SEVERAL VARIABLES BULLETIN DE LA SOCIETE MATHEMATIQUE DE FRANCE, 1973, (34): : 55 - 140
- [6] PARTIAL HYPOELLIPTICITY OF CLASS OF ELLIPTICAL AND DEGENERATE OPERATORS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1974, 278 (11): : 775 - 778
- [8] STUDY OF REGULARITY AND SPECTRUM OF A CLASS OF ELLIPTICAL DEGENERATED OPERATORS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1968, 266 (06): : 336 - &
- [9] A CERTAIN CLASS OF ORDINARY ELLIPTICAL AND DEGENERATE DIFFERENTIAL OPERATORS PROCEEDINGS OF THE JAPAN ACADEMY, 1968, 44 (09): : 944 - &
- [10] REGULARITY OF A CLASS OF SECOND ORDER DEGENERATE ELLIPTIC OPERATORS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1969, 268 (10): : 532 - &