## On degenerate boundary value problems for elliptic differential operators of second order in the plane and the index of degenerate pseudo-differential operators on a closed curve By JOHANNES ELSCHNER in Berlin (Eingegangen am 21.11. 1980)
Compatibility operators for degenerate elliptic equations on the ball and Heisenberg group
β Scribed by C. Robin Graham
- Publisher
- Springer-Verlag
- Year
- 1984
- Tongue
- French
- Weight
- 705 KB
- Volume
- 187
- Category
- Article
- ISSN
- 0025-5874
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## Abstract In [1, 2, 3, 4, 6], the authors posed and discussed some boundaryβvalue problems of second order elliptic equations with parabolic degeneracy. In [5], the authors posed and discussed some boundaryβvalue problems of second order mixed equations with degenerate curve on the sides of an an
Covariant differential operators of arbitrary order, which are analogues of Hill's operator and act on densities of weights -k/2 (k ~ IN), are constructed and the KdV equation is formulated as a flow on a diffeomorphism group. AMS subject classifications (1980). 47B38, 35K55.