Shift-invariant functionals on Banach sequence spaces

• Autorzy: Albrecht Pietsch
• Języki publikacji: EN

Abstrakty

EN

The present paper is a continuation of [23], from which we know that the theory of traces on the Marcinkiewicz operator ideal
$𝔐 (H):= {T ∈ 𝔏(H): sup_{1≤m<∞} 1/(log m + 1) ∑_{n=1}^{m} aₙ(T) < ∞}$
can be reduced to the theory of shift-invariant functionals on the Banach sequence space
$𝔴(ℕ₀):= {c = (γ_{l}): sup_{0≤k<∞} 1/(k+1) ∑_{l=0}^{k} |γ_{l}| < ∞}$.

The final purpose of my studies, which will be finished in [24], is the following. Using the density character as a measure, I want to determine the size of some subspaces of the dual 𝔐 *(H). Of particular interest are the sets formed by the Dixmier traces and the Connes-Dixmier traces (see [2], [4], [6], and [13]).
As an intermediate step, the corresponding subspaces of 𝔴*(ℕ₀) are treated. This approach has a significant advantage, since non-commutative problems turn into commutative ones.

Kategorie tematyczne

• 47B37: Operators on special spaces (weighted shifts, operators on sequence spaces, etc.)
• 46B45: Banach sequence spaces
• 47B10: Operators belonging to operator ideals (nuclear, p -summing, in the Schatten-von Neumann classes, etc.)

• Wydawca: Institute of Mathematics Polish Academy of Sciences
• Czasopismo: Studia Mathematica
• Rocznik: 2013
• Tom: 214
• Numer: 1
• Strony: 37-66

Daty

wydano

2013

Twórcy

autor

Albrecht Pietsch

• Biberweg 7, D-07749 Jena, Germany

Identyfikatory

DOI

10.4064/sm214-1-3