A. Yurachkivsky

collaborators

2 papers

math.FA2007

A Criterion for Precompactness in the Space of Hypermeasures

Andriy Yurachkivsky

Let $Q$ denote the space of signed measures on the Borel $σ$ -algebra of a separable complete space $X$ . We endow $Q$ with the norm $∥ q ∥ = sup ∣ \int ϕ d q ∣$ , where the supremum is take…

math.FA2007

Approximate calculation of operator semigroups by perturbation of generators

A. Yurachkivsky, A. Zhugayevych

Let $Ω$ be an operator semigroup with generator $A$ in a sequentially complete locally convex topological vector space $E$ . For a semigroup with generator $A + D$ , where $D$ is a bou…