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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.48.

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Flow invariance for nonlinear partial differential delay equations
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by Wolfgang M. Ruess PDF
Trans. Amer. Math. Soc. 361 (2009), 4367-4403 Request permission

Abstract:

Several fundamental results on existence, flow-invariance, regularity, and linearized stability of solutions to the nonlinear partial differential delay equation $\dot {u}(t) + Bu(t) \ni F(u_t), t\geq 0, u_0 = \varphi ,$ with $B\subset X\times X$ $\omega -$accretive, are developed for a general Banach space $X.$ In contrast to existing results, with the history-response $F$ globally defined and, at least, Lipschitz on bounded sets, the results are tailored for situations with $F$ defined on (possibly) thin subsets of the initial-history space $E$ only, and are applied to place several classes of population models in their natural $L^1-$setting. The main result solves the open problem of a subtangential condition for flow-invariance of solutions in the fully nonlinear case, paralleling those known for the cases of (a) no delay, (b) ordinary delay equations with $B\equiv 0,$ and (c) the semilinear case.
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Additional Information
  • Wolfgang M. Ruess
  • Affiliation: Fachbereich Mathematik, Universität Duisburg-Essen, D-45117 Essen, Germany
  • Email: wolfgang.ruess@uni-due.de
  • Received by editor(s): October 2, 2007
  • Published electronically: March 4, 2009
  • © Copyright 2009 American Mathematical Society
    The copyright for this article reverts to public domain 28 years after publication.
  • Journal: Trans. Amer. Math. Soc. 361 (2009), 4367-4403
  • MSC (2000): Primary 47J35, 35R10; Secondary 47H06, 47H20, 47N60, 92D25
  • DOI: https://doi.org/10.1090/S0002-9947-09-04833-8
  • MathSciNet review: 2500891