Browsing Department of Mathematics by Subject "functional calculus, spectral operator, extension"

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    • A Functional Calculus for (α, α+ 1)− type R Operators 

      Paul O Oleche, John O Agure (Int. Journal of Math. Analysis,, 2010)
      A closed densely defined operator H, on a Banach space X, whose spectrum is contained in R and satisfies (z − H)−1 ≤ c z α | z|β ∀ z ∈ R with z α := |z|2 + 1 (1) for some α , β ≥ 0; c > 0, is said to ...