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Apr
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awarded  Revival
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Feb
17
answered Every norm-decreasing algebra morphism $L_1(G)\to\mathcal{B}(E)$ comes from a group representation
Feb
17
answered Why are the convolvers in the bicommutant of the pseudo-measures? ($CV_p(G)\subseteq PM_p(G)''$)
Feb
16
revised Weak*-closure of finite rank operators on dual space
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Feb
16
answered Weak*-closure of finite rank operators on dual space
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Feb
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comment Ultraweak topology on B(X): Is the map X\otimes X* -> B(X)* isometric?
@YemonChoi: I would look at $B(X,X^{**})$ instead of $B(X^*)$, then we're asking if the ball of $B(X,X)$ is weak$^*$-dense in the ball of $B(X,X^{**})$. The PLR shows that this is true for finite-rank operators; and the metric approximation property allows you to reduce from all operators to just the finite-rank ones. If $X$ is reflexive, then there is nothing to prove. What I don't see is how to combine these two rather different viewpoints...!
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Jul
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accepted “Minimal” group C*-algebra?
Jul
3
revised Arveson's extension for normal completely positive maps
Showing that the final part is not correct.
Jul
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answered Arveson's extension for normal completely positive maps
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