If $X_nto X$ in $L^p$, is $E(X_n^p)to E(X^p)$ true?
  
 
     
     
             
                 
 
 
         
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    Let $p$  denote a positive integer. If $X_nto X$  in $L^p$ , is $E(X_n^p)to E(X^p)$  true?    If each $X_n$  and $X$  are nonnegative, then it follows directly from Minkowski's inequality.   Then how about the general case? I separated each $X_n$  into its positive and negative parts as $X_n=X_n^+-X_n^-$ , but it might not be the case that $X_n^+to X^+$  and $X_n^-to X^-$  in $L^p$ .      
 
         
             
                 probability-theory lp-spaces 
             
         
 
     
         
             
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         edited Dec 2 at 12:42 
     
     
         
     
     
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         asked Dec 2 at 11:37 
     
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