Can we find a natural norm smaller than the infinite norm for this special matrix?












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Let $hat{bf H}$ be a $phat{N}times p hat{N}$ sparse matrix consisting of $ptimes p$ blocks, where each block is of size $hat{N}timeshat{N}$. The values in $hat{bf H}$ is illustrated below (empty places are zero):




enter image description here




The infinite norm of $hat{bf H}$ is obviously 1, and I know infinite norm is no larger than any $p$-norm. My question is, is there an even smaller natural norm for this $hat{bf H}$?





The proof that infinite norm is no larger than any $p$-norm.




enter image description here











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$endgroup$

















    1












    $begingroup$


    Let $hat{bf H}$ be a $phat{N}times p hat{N}$ sparse matrix consisting of $ptimes p$ blocks, where each block is of size $hat{N}timeshat{N}$. The values in $hat{bf H}$ is illustrated below (empty places are zero):




    enter image description here




    The infinite norm of $hat{bf H}$ is obviously 1, and I know infinite norm is no larger than any $p$-norm. My question is, is there an even smaller natural norm for this $hat{bf H}$?





    The proof that infinite norm is no larger than any $p$-norm.




    enter image description here











    share|cite|improve this question











    $endgroup$















      1












      1








      1





      $begingroup$


      Let $hat{bf H}$ be a $phat{N}times p hat{N}$ sparse matrix consisting of $ptimes p$ blocks, where each block is of size $hat{N}timeshat{N}$. The values in $hat{bf H}$ is illustrated below (empty places are zero):




      enter image description here




      The infinite norm of $hat{bf H}$ is obviously 1, and I know infinite norm is no larger than any $p$-norm. My question is, is there an even smaller natural norm for this $hat{bf H}$?





      The proof that infinite norm is no larger than any $p$-norm.




      enter image description here











      share|cite|improve this question











      $endgroup$




      Let $hat{bf H}$ be a $phat{N}times p hat{N}$ sparse matrix consisting of $ptimes p$ blocks, where each block is of size $hat{N}timeshat{N}$. The values in $hat{bf H}$ is illustrated below (empty places are zero):




      enter image description here




      The infinite norm of $hat{bf H}$ is obviously 1, and I know infinite norm is no larger than any $p$-norm. My question is, is there an even smaller natural norm for this $hat{bf H}$?





      The proof that infinite norm is no larger than any $p$-norm.




      enter image description here








      linear-algebra norm






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      share|cite|improve this question













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      share|cite|improve this question








      edited Dec 8 '18 at 16:02







      Tony

















      asked Dec 8 '18 at 5:50









      TonyTony

      1,7741828




      1,7741828






















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