On the Local Smoothness of Weak Solutions and Hypoellipticity of Second Order Differential Equations
Chapter II is basically concerned with the study of local smoothness of weak solutions of second order equations with nonnegative characteristic form and, in particular, conditions for hypoellipticity.
KeywordsWeak Solution Differential Operator Induction Hypothesis Order Equation Pseudo Differential Operator
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© American Mathematical Society, Providence, Rhode Island and Plenum Press, New York 1973