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Possible Duplicate:
How can I give a bound on the $L^2$ norm of this function?

For $f\in L^p((1,\infty),m)$, $2

Want to prove that there exists $C$ which only depends on $p$, such that

$$V(f,x)=\frac{1}{x}\int^{10x}_x\frac{f(t)}{t^{\frac{1}{4}}}dm(t)$$

satisfies

$$||V(f,x)||_{L^2((1,\infty),m)}\le C||f||_{L^p((1,\infty),m)}$$

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    I have seen a similar question on this website if it is not exactly the same.2012-11-29

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