数学季刊 ›› 1996, Vol. 11 ›› Issue (2): 82-84.
摘要: In this paper,we proved that the infinitesimal generator of a strongly continuous co- sine operator function is preserved under the time-dependent perturbation in the sun-reflexive case,where the perturbed operator is a bounded linear operator from X into a bigger space X(not X),then the corresponding 2-order abstract Cauchy problem is uniformly well-posed.
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