Annali di Matematica Pura ed Applicata

, Volume 39, Issue 1, pp 63–64 | Cite as

Extension of Huyghens' principle to the ultrahyperbolic equation

  • Hans Lewy


Asgeirsson's formula of spherical averages in shown to be a consequence of the validity of the ultrahyperbolic equation on a certain characteristic manifold.


Spherical Average Characteristic Manifold Ultrahyperbolic Equation 
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  1. (1).
    SeeR. Courant andD. Hilbert,Methoden der mathematischen Physik, Volume II, Springer, Berlin 1937, p. 417.Google Scholar

Copyright information

© Swets & Zeitlinger B. V. 1955

Authors and Affiliations

  • Hans Lewy
    • 1
  1. 1.BerkeleyU.S.A.

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