G. Lewicki

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20102022

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Showing 2015Show all

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math.FA2015

Characterization Conditions and the Numerical Index

Asuman Guven Aksoy, Grzegorz Lewicki

In this paper we survey some recent results concerning the numerical index $n (\cdot)$ for large classes of Banach spaces, including vector valued $ℓ_{p}$ -spaces and $ℓ_{p}$ -sums…

math.FA2015

Bernstein's Lethargy Theorem in Frechet Spaces

Asuman Guven Aksoy, Grzegorz Lewicki

In this paper we consider Bernstein's Lethargy Theorem (BLT) in the context of Fréchet spaces. Let $X$ be an infinite-dimensional Fréchet space and let $V = {V_{n}}$ be a n…