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10:51
@N.Maneesh I think $x(s)$ is a fixed function with bounded supremum. In that case, yes $S,T$ commute with $\|S\|=\int_0^1x(t)dt$, $\|T\|=\sup x(s)$, $\|ST\|=\|TS\|=\int_0^1x(t)dt\sup x(s)$
 
6 hours later…
16:59
@vidyarthi I got the answer.

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