On the Harnack Inequality for a Class of Hypoelliptic Evolution Equations
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چکیده
We give a direct proof of the Harnack inequality for a class of degenerate evolution operators which contains the linearized prototypes of the Kolmogorov and Fokker-Planck operators. We also improve the known results in that we find explicitly the optimal constant of the inequality.
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تاریخ انتشار 2004