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arxiv: 1701.07310 · v1 · pith:2TOIBGXZnew · submitted 2017-01-25 · 🧮 math.FA

Equivalence between estimates for quasi-commutators and commutators

classification 🧮 math.FA
keywords estimatescommutatorcommutatorsconditionsderivedequalequivalenceestimate
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In this short note we show that under some mild conditions on the space and the operators, an estimate for $\|Sf(A) - f(B)S\|$ needs only to be studied for invertible $S$ and $B$ equal to $A$. Thus estimates for a quasi-commutator can be derived from that for the commutator.

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