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pro vyhledávání: '"Bogdan D. Doytchinov"'
Publikováno v:
Semigroup Forum. 54:100-111
LetX be a Banach space and letA be the infinitesimal generator of a differentiable semigroup {T(t) |t ≥ 0}, i.e. aC0-semigroup such thatt ↦T(t)x is differentiable on (0, ∞) for everyx eX. LetB be a bounded linear operator onX and let {S(t) |t