Published online by Cambridge University Press: 26 November 2024
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.