On degenerate boundary value problems fo
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Johannes Elschner
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Article
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1981
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John Wiley and Sons
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English
โ 680 KB
## 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)