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In this paper, apply an established transference principle to obtain the boundedness of certain functional calculi for the sequence of semigroup generators. It is proved thatif -𝐴𝐴 𝑗𝑗 be the sequence generates 𝐶𝐶 0 -semigroups on a Hilbert space, then for each 𝜀𝜀 > -1 the sequence of operators 𝐴𝐴 𝑗𝑗 has bounded calculus for the closed ideal of bounded holomorphic functions on right half-plane. The bounded of this calculus grows at most logarithmically as(1 + 𝜀𝜀) ↘ 0. As a consequence decay at ∞. Then showed that each sequence of semigroup generator has a socalled (strong) m-bounded calculus for all m ∈ ℕ, and that this property characterizes the sequence of semigroup generators. Similar results are obtained if the underlying Banach space is a UMD space. Upon restriction to so-called 𝛾𝛾 𝑗𝑗 -𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏 semigroups, the Hilbert space results actually hold in general Banach spaces.
Shawgy Hussein. 2019. \u201cFunctional Calculus for the Series of Semigroup Generators Via Transference\u201d. Global Journal of Science Frontier Research - F: Mathematics & Decision GJSFR-F Volume 19 (GJSFR Volume 19 Issue F5): .
Crossref Journal DOI 10.17406/GJSFR
Print ISSN 0975-5896
e-ISSN 2249-4626
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Total Score: 76
Country: Sudan
Subject: Global Journal of Science Frontier Research - F: Mathematics & Decision
Authors: Shawgy Hussein, Simon Joseph, Ahmed Sufyan, Murtada Amin, Ranya Tahir, Hala Taha (PhD/Dr. count: 0)
View Count (all-time): 169
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Publish Date: 2019 12, Mon
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In this paper, apply an established transference principle to obtain the boundedness of certain functional calculi for the sequence of semigroup generators. It is proved thatif -𝐴𝐴 𝑗𝑗 be the sequence generates 𝐶𝐶 0 -semigroups on a Hilbert space, then for each 𝜀𝜀 > -1 the sequence of operators 𝐴𝐴 𝑗𝑗 has bounded calculus for the closed ideal of bounded holomorphic functions on right half-plane. The bounded of this calculus grows at most logarithmically as(1 + 𝜀𝜀) ↘ 0. As a consequence decay at ∞. Then showed that each sequence of semigroup generator has a socalled (strong) m-bounded calculus for all m ∈ ℕ, and that this property characterizes the sequence of semigroup generators. Similar results are obtained if the underlying Banach space is a UMD space. Upon restriction to so-called 𝛾𝛾 𝑗𝑗 -𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏 semigroups, the Hilbert space results actually hold in general Banach spaces.
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