On a class of degenerate elliptic equations
1974 ◽
Vol 55
◽
pp. 181-204
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Keyword(s):
We shall prove in Chapter I the hypoellipticity for a class of degenerate elliptic operators of higher order. Chapter II will be devoted to the consideration of the regularity at the boundary for the solutions of general boundary problems for the equations considered in Chapter I being restricted to the second order.
2012 ◽
Vol 278
(1)
◽
pp. 1-9
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1969 ◽
Vol 8
(1)
◽
pp. 1-32
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Keyword(s):
1987 ◽
Vol 39
(6)
◽
pp. 3088-3148
◽
1994 ◽
Vol 127
(3)
◽
pp. 231-254
◽
Keyword(s):
Keyword(s):
2005 ◽
Vol 21
(2)
◽
pp. 118-131
◽
Keyword(s):