On the Local Smoothness of Weak Solutions and Hypoellipticity of Second Order Differential Equations

  • O. A. Oleĭnik
  • E. V. Radkevič


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.


Weak Solution Differential Operator Induction Hypothesis Order Equation Pseudo Differential Operator 
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Copyright information

© American Mathematical Society, Providence, Rhode Island and Plenum Press, New York 1973

Authors and Affiliations

  • O. A. Oleĭnik
    • 1
  • E. V. Radkevič
    • 2
  1. 1.Moscow State UniversityMoscowUSSR
  2. 2.Institute for Problems of MechanicsAcademy of Sciences of the USSRMoscowUSSR

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