Mathematics – Analysis of PDEs
Scientific paper
2002-04-15
Mathematics
Analysis of PDEs
Final version, to appear in Zeitschrift fuer Analysis und ihre Anwendungen
Scientific paper
We prove a Harnack inequality for a class of two-weight degenerate elliptic
operators. The metric distance is induced by continuous Grushin-type vector
fields. It is not know whether there exist cutoffs fitting the metric balls.
This obstacle is bypassed by means of a covering argument that allows the use
of rectangles in the Moser iteration.
Fernandes J. D.
Groisman Jorge
Melo Severino T.
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