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Commutator of translation invariant operators on $L^2(\mathbb{R})$

I have a question concerning the commutator of translation invariant operators on $L^2(\mathbb{R})$. Recall that $S:L^2(\mathbb{R})\to L^2(\mathbb{R})$ is translation invariant if $Su_t=u_tS$ for all …
Lenard Velasquez's user avatar