Mathematics Subject Classification 2000
35Hxx Close-to-elliptic equations ( 0 Dok. )
- 35H10 Hypoelliptic equations ( 0 Dok. )
- 35H20 Subelliptic equations ( 0 Dok. )
- 35H30 Quasi-elliptic equations ( 0 Dok. )
- 35H99 None of the above, but in this section ( 0 Dok. )