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Transactions of the American Mathematical Society

Published by the American Mathematical Society, the Transactions of the American Mathematical Society (TRAN) is devoted to research articles of the highest quality 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 1.43.

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Characterization of nonlinear semigroups associated with semilinear evolution equations
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by Shinnosuke Oharu and Tadayasu Takahashi PDF
Trans. Amer. Math. Soc. 311 (1989), 593-619 Request permission

Abstract:

Nonlinear continuous perturbations of linear dissipative operators are considered from the point of view of the nonlinear semigroup theory. A general class of nonlinear perturbations of linear contraction semigroups in a Banach space $X$ is introduced by means of a lower semicontinuous convex functional $[{\text {unk}}]:X \to [0,\infty ]$ and two notions of semilinear infinitesimal generators of the associated nonlinear semigroups are formulated. Four types of necessary and sufficient conditions are given for a semilinear operator $A + B$ of the class to be the infinitesimal generator of a nonlinear semigroup $\{ S(t):t \geqslant 0\}$ on the domain $C$ of $B$ such that for $x \in C$ the $C$-valued function $S( \cdot )x$ on $[0,\infty )$ provides a unique mild solution of the semilinear evolution equation $u’(t) = (A + B)u(t)$ satisfying a growth condition for the function $[{\text {unk]}}(u( \cdot ))$. It turns out that various types of characterizations of nonlinear semigroups associated with semilinear evolution equations are obtained and, in particular, a semilinear version of the Hille-Yosida theorem is established in a considerably general form.
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Additional Information
  • © Copyright 1989 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 311 (1989), 593-619
  • MSC: Primary 47H20; Secondary 58D25
  • DOI: https://doi.org/10.1090/S0002-9947-1989-0978369-9
  • MathSciNet review: 978369