Skip to main content
MathOverflow
Olaf Kummers's user avatar
Olaf Kummers's user avatar
Olaf Kummers's user avatar
Olaf Kummers
Unregistered
  • Member for 12 years, 8 months
Profile Activity

23 Actions

All Accepts Posts Badges Comments Revisions Reviews Suggestions
comment
Do (Banach) ultrapowers carry some sort of 'elementary equivalence'?
A wonderful answer. Unfortunately, the above-mentioned property for $\ell_2\oplus c_0$ is not clear to me...
accepted
Do (Banach) ultrapowers carry some sort of 'elementary equivalence'?
comment
Projections which are not completely bounded
Sure, sorry. :)
comment
Projections which are not completely bounded
What do you mean both? One of them can be e.g. $\ell_\infty$.
comment
Projections which are not completely bounded
Thanks. How about (Banach) complemented subspaces (Banach) isomorphic to $\mathcal{K}(H)$ or $\mathcal{B}(H)$?
accepted
Projections which are not completely bounded
asked
Projections which are not completely bounded
comment
Do (Banach) ultrapowers carry some sort of 'elementary equivalence'?
Please note $c_0$ has also this property.
comment
Do (Banach) ultrapowers carry some sort of 'elementary equivalence'?
Yes, I am. Of course, I am asking about reasonable but non-trivial properties.
asked
Do (Banach) ultrapowers carry some sort of 'elementary equivalence'?
accepted
Unbounded sequences in Banach spaces
accepted
Basic sequences in $\ell_p$
revised
Unbounded sequences in Banach spaces
edot
revised
Unbounded sequences in Banach spaces
dr
asked
Unbounded sequences in Banach spaces
awarded
 Editor
revised
Basic sequences in $\ell_p$
dr
comment
Basic sequences in $\ell_p$
Thank you. Indeed, I am also interested in the $L_p$ case as well so let me modify my question.
asked
Basic sequences in $\ell_p$
awarded
 Scholar
1
2