Bad properties of the Bernstein numbers
Studia Mathematica, Tome 184 (2008) no. 3, pp. 263-269
Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences
We show that the classes $\mathfrak L_p^{\rm bern}:=
\{ T : (b_n(T) ) \in l_p \}$
associated with the Bernstein numbers $b_n$ fail to be operator ideals.
Moreover, $\mathfrak L_p^{\rm bern} \circ \mathfrak L_q^{\rm bern}
\not\subseteq \mathfrak L_r^{\rm bern}$
for $1/r = 1/p + 1/q$.
Keywords:
classes mathfrak bern associated bernstein numbers fail operator ideals moreover mathfrak bern circ mathfrak bern subseteq mathfrak bern
Affiliations des auteurs :
Albrecht Pietsch  1
@article{10_4064_sm184_3_5,
author = {Albrecht Pietsch},
title = {Bad properties of the {Bernstein} numbers},
journal = {Studia Mathematica},
pages = {263--269},
year = {2008},
volume = {184},
number = {3},
doi = {10.4064/sm184-3-5},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.4064/sm184-3-5/}
}
Albrecht Pietsch. Bad properties of the Bernstein numbers. Studia Mathematica, Tome 184 (2008) no. 3, pp. 263-269. doi: 10.4064/sm184-3-5
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