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Jul 29 at 16:57 vote accept Zhaoting Wei
Jul 29 at 8:46 comment added David Gao As it turns out, $A_q$ is just the unitization of the algebra of compact operators. $a$ is a diagonal compact operator, while $b$ is the product of a diagonal compact operator and the unilateral shift.
Jul 28 at 19:26 history became hot network question
Jul 28 at 17:25 comment added David Gao I’ve now provided a concrete description of $A_q$ and $a, b \in A_q$ in my answer, which should give you any information you may want on its elements, not just the norms of $a$ and $b$.
S Jul 28 at 16:07 history mod moved comments to chat
S Jul 28 at 16:07 comment added Stefan Kohl Comments have been moved to chat; please do not continue the discussion here. Before posting a comment below this one, please review the purposes of comments. Comments that do not request clarification or suggest improvements usually belong as an answer, on MathOverflow Meta, or in MathOverflow Chat. Comments continuing discussion may be removed.
Jul 28 at 14:01 history edited LSpice CC BY-SA 4.0
Podle\'s -> Podleś also in body; `||\cdot||` -> `\lVert\cdot\rVert`
Jul 28 at 13:46 answer added David Gao timeline score: 8
Jul 28 at 12:55 history edited Martin Sleziak CC BY-SA 4.0
edited title
S Jul 28 at 12:47 history suggested JP McCarthy CC BY-SA 4.0
It wasn't a typo - there is an accent on the s.
Jul 28 at 10:31 review Suggested edits
S Jul 28 at 12:47
Jul 28 at 6:54 history edited Martin Sleziak CC BY-SA 4.0
a minor typo
Jul 28 at 2:58 history asked Zhaoting Wei CC BY-SA 4.0