$\[{L^2}\]$-HYPOELLIPTICITY FOR A CLASS OF OPERATORS OF MIXED TYPE
Citation：
Hong Jiaxing.$\[{L^2}\]$-HYPOELLIPTICITY FOR A CLASS OF OPERATORS OF MIXED TYPE[J].Chinese Annals of Mathematics B,1988,9(2):183~188
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Authors：
Hong Jiaxing;
Abstract：
The present paper gives the notion of $\[{L^2}\]$-hypoellipticity for differential operator and proves that a class of differential operators of mixed type are of $\[{L^2}\]$-hypoellipticity on their degenerated curves.
