« first day (1976 days earlier)      last day (1932 days later) » 

Martin Sleziak
Martin Sleziak
11:08 AM
In connection with the tag-wikis copied without an attribution:
Aug 12 '18 at 12:57, by Martin Sleziak
It seems that the tag-info for reductive-groups was taken from Wikipedia. However, the Wikipedia article has changed substantially since then - here is the current revision.
 
 
2 hours later…
Martin Sleziak
Martin Sleziak
1:33 PM
0
Q: Norm of a tuple of operators

SchülerLet $F$ be a complex Hilbert space and $\mathcal{B}(F)$ be the algebra of all bounded linear operators on $F$. For ${\bf A} = (A_1,...,A_d) \in \mathcal{B}(F)^d$, the norm of ${\bf A}$ is given by $$\|{\bf A}\|^2=\sum_{k=1}^d\|A_k\|^2.$$ For ${\bf T}=(T_1,...,T_d) \in \mathcal{B}(F)^d$ and ${...

fa.functional-analysis abstract-algebra
I will just remind that the (abstract-algebra) is deprecated on MathOverflow - see the tag-info. (But I should probably leave the choice of the correct tags for users more knowledgeable of this area.) — Martin Sleziak 1 min ago
 
 
6 hours later…
Martin Sleziak
Martin Sleziak
7:20 PM
@MartinSleziak The post was retagged by Nate Eldredge.
 

« first day (1976 days earlier)      last day (1932 days later) »