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Well-posedness of quasilinear parabolic equations in time-weighted spaces
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- Journal:
- Proceedings of the Royal Society of Edinburgh. Section A: Mathematics , First View
- Published online by Cambridge University Press:
- 26 November 2024, pp. 1-33
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Well-posedness in time-weighted spaces of certain quasilinear (and semilinear) parabolic evolution equations
$u'=A(u)u+f(u)$ is established. The focus lies on the case of strict inclusions 
$\mathrm{dom}(f)\subsetneq \mathrm{dom}(A)$ of the domains of the nonlinearities 
$u\mapsto f(u)$ and 
$u\mapsto A(u)$. Based on regularizing effects of parabolic equations it is shown that a semiflow is generated in intermediate spaces. In applications this allows one to derive global existence from weaker a priori estimates. The result is illustrated by examples of chemotaxis systems.
