Fritz John pp 267-291 | Cite as

Solutions of Second Order Hyperbolic Differential Equations with Constant Coefficients in a Domain with a Plane Boundary

  • Fritz John
Part of the Contemporary Mathematicians book series (CM)


It is known that solutions of partial differential equations often have special regularity properties that set them apart from the “arbitrary” functions of any class C m or even C . For example solutions of analytic elliptic equations are themselves analytic. Similarly, solutions of the heat equation are analytic in the space variables and of class C in the time. Even solutions of hyperbolic or ultra-hyperbolic equations have their special regularity properties, where however “regularity” does not always consist in possessing a large number of derivatives. This may find its expression in the fact that local integral transforms of the solution have many derivatives or even are analytic. Often the solutions form a family of functions, which share with the analytic functions the property of unique continuation, at least within certain limits.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer Science+Business Media New York 1985

Authors and Affiliations

  • Fritz John

There are no affiliations available

Personalised recommendations