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Jan 29, 2022 at 17:48 comment added Niser $T=\partial_t +a(t,x,\partial_x)$ where $a$ is a differential operator for example.
Jan 29, 2022 at 17:27 comment added Michael Renardy What is $T$? An operator in $H^s$ that is independent of t? Then I do not see how such an inequality would ever hold in the first place.
Jan 29, 2022 at 8:07 history edited Daniele Tampieri CC BY-SA 4.0
Minor Math Jaxing: I've made explicit the dependency of $u$ on $t$.
Jan 29, 2022 at 7:37 history asked Niser CC BY-SA 4.0