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$u_t=Au+F(u)$ where $A$ is the infinitesimal generator of $C_0$-semigroup

Yes the theorem is true in the general case. The semigroup is assumed to be contractive for the sake of simplicity. Of course the assumption is not restrictive since there is always an equivalent norm …
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1 vote

Variational formulation of abstract Cauchy problem, possible?

See the book of A. Bensoussane et al. for different notions of solutions in section: 3 Nonhomogeneous linear evolution equations, especially Proposition 3.1 and 3.2 where it is proved that some of the …
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