Converging almost everywhere in finite space but not in p-th mean












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Give example of a finite measure space and a sequence of functions which converges $mu$-a.e but not in p-mean, for any $pgeqslant 1$.




I was thinking of the following spaces $([0,1],mathscr{B_{[0,1]}},lambda)$ and $(mathbb{R},mathscr{B_{mathbb{R}}},lambda)$. I need to find a sequence of function that as $nto 0$ the function goes to infinity.



I was tinking of $f(x)=x^n$ for $0<x<1$. But I am not sure.



Question:



Which function would you suggest?



Thanks in advance!










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    1












    $begingroup$



    Give example of a finite measure space and a sequence of functions which converges $mu$-a.e but not in p-mean, for any $pgeqslant 1$.




    I was thinking of the following spaces $([0,1],mathscr{B_{[0,1]}},lambda)$ and $(mathbb{R},mathscr{B_{mathbb{R}}},lambda)$. I need to find a sequence of function that as $nto 0$ the function goes to infinity.



    I was tinking of $f(x)=x^n$ for $0<x<1$. But I am not sure.



    Question:



    Which function would you suggest?



    Thanks in advance!










    share|cite|improve this question









    $endgroup$















      1












      1








      1





      $begingroup$



      Give example of a finite measure space and a sequence of functions which converges $mu$-a.e but not in p-mean, for any $pgeqslant 1$.




      I was thinking of the following spaces $([0,1],mathscr{B_{[0,1]}},lambda)$ and $(mathbb{R},mathscr{B_{mathbb{R}}},lambda)$. I need to find a sequence of function that as $nto 0$ the function goes to infinity.



      I was tinking of $f(x)=x^n$ for $0<x<1$. But I am not sure.



      Question:



      Which function would you suggest?



      Thanks in advance!










      share|cite|improve this question









      $endgroup$





      Give example of a finite measure space and a sequence of functions which converges $mu$-a.e but not in p-mean, for any $pgeqslant 1$.




      I was thinking of the following spaces $([0,1],mathscr{B_{[0,1]}},lambda)$ and $(mathbb{R},mathscr{B_{mathbb{R}}},lambda)$. I need to find a sequence of function that as $nto 0$ the function goes to infinity.



      I was tinking of $f(x)=x^n$ for $0<x<1$. But I am not sure.



      Question:



      Which function would you suggest?



      Thanks in advance!







      functional-analysis measure-theory examples-counterexamples






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      asked Jan 30 at 12:02









      Pedro GomesPedro Gomes

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          $begingroup$

          On the space you are considering take $f_n(x)=n$ of $0<x<frac 1 n$ and $0$ otherwise.






          share|cite|improve this answer









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            1 Answer
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            active

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            active

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            1












            $begingroup$

            On the space you are considering take $f_n(x)=n$ of $0<x<frac 1 n$ and $0$ otherwise.






            share|cite|improve this answer









            $endgroup$


















              1












              $begingroup$

              On the space you are considering take $f_n(x)=n$ of $0<x<frac 1 n$ and $0$ otherwise.






              share|cite|improve this answer









              $endgroup$
















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                1





                $begingroup$

                On the space you are considering take $f_n(x)=n$ of $0<x<frac 1 n$ and $0$ otherwise.






                share|cite|improve this answer









                $endgroup$



                On the space you are considering take $f_n(x)=n$ of $0<x<frac 1 n$ and $0$ otherwise.







                share|cite|improve this answer












                share|cite|improve this answer



                share|cite|improve this answer










                answered Jan 30 at 12:04









                Kavi Rama MurthyKavi Rama Murthy

                72.1k53170




                72.1k53170






























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