• O. A. Oleĭnik
  • E. V. Radkevič


Second order equations with nonnegative characteristic form constitute a new branch of the theory of partial differential equations, having arisen within the last 20 years, and having undergone a particularly intensive development in recent years.


Weak Solution Cauchy Problem Elliptic Equation Smooth Solution Order Equation 
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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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