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Does the loss of regularity really appear?
Author(s) -
Lu Xiaojun,
Reissig Michael
Publication year - 2008
Publication title -
mathematical methods in the applied sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.719
H-Index - 65
eISSN - 1099-1476
pISSN - 0170-4214
DOI - 10.1002/mma.1086
Subject(s) - mathematics , cauchy distribution , pure mathematics , calculus (dental) , mathematical analysis , mathematical economics , medicine , dentistry
In the theory of weakly hyperbolic equations we have the effect of loss of regularity . The present paper devotes to the study of two problems. On the one hand we describe families of weakly hyperbolic Cauchy problems for which we have no loss of regularity . On the other hand we discuss the question if the loss of derivatives really appears. Copyright © 2008 John Wiley & Sons, Ltd.