Property on Kronecker product












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I read a paper and there was an equation which was finally derived an equivalent expression as



$$
L = L_{T} otimes I_{G} + I_{T} otimes L_{G} = {color{blue}{L_{T} times L_{G}}} ,
$$



and considering $L_{T} = U_{T}Lambda_{T} U_{T}^{*}$ and $L_{G} = U_{G}Lambda_{G} U_{G}^{*}$, it is obtained



$$
L = {color{red}{(U_{T}otimes U_{G})(Lambda_{T} times Lambda_{G})(U_{T} otimes U_{G})^*}} ,
$$



where $otimes$ accounts for the Kronecker product, $*$ is the Hermitian and $times$ is the Cartesian product.



I am confused how to obtain the results in blue and red. Would you please help me to clarify them?










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    0












    $begingroup$


    I read a paper and there was an equation which was finally derived an equivalent expression as



    $$
    L = L_{T} otimes I_{G} + I_{T} otimes L_{G} = {color{blue}{L_{T} times L_{G}}} ,
    $$



    and considering $L_{T} = U_{T}Lambda_{T} U_{T}^{*}$ and $L_{G} = U_{G}Lambda_{G} U_{G}^{*}$, it is obtained



    $$
    L = {color{red}{(U_{T}otimes U_{G})(Lambda_{T} times Lambda_{G})(U_{T} otimes U_{G})^*}} ,
    $$



    where $otimes$ accounts for the Kronecker product, $*$ is the Hermitian and $times$ is the Cartesian product.



    I am confused how to obtain the results in blue and red. Would you please help me to clarify them?










    share|cite|improve this question











    $endgroup$















      0












      0








      0


      1



      $begingroup$


      I read a paper and there was an equation which was finally derived an equivalent expression as



      $$
      L = L_{T} otimes I_{G} + I_{T} otimes L_{G} = {color{blue}{L_{T} times L_{G}}} ,
      $$



      and considering $L_{T} = U_{T}Lambda_{T} U_{T}^{*}$ and $L_{G} = U_{G}Lambda_{G} U_{G}^{*}$, it is obtained



      $$
      L = {color{red}{(U_{T}otimes U_{G})(Lambda_{T} times Lambda_{G})(U_{T} otimes U_{G})^*}} ,
      $$



      where $otimes$ accounts for the Kronecker product, $*$ is the Hermitian and $times$ is the Cartesian product.



      I am confused how to obtain the results in blue and red. Would you please help me to clarify them?










      share|cite|improve this question











      $endgroup$




      I read a paper and there was an equation which was finally derived an equivalent expression as



      $$
      L = L_{T} otimes I_{G} + I_{T} otimes L_{G} = {color{blue}{L_{T} times L_{G}}} ,
      $$



      and considering $L_{T} = U_{T}Lambda_{T} U_{T}^{*}$ and $L_{G} = U_{G}Lambda_{G} U_{G}^{*}$, it is obtained



      $$
      L = {color{red}{(U_{T}otimes U_{G})(Lambda_{T} times Lambda_{G})(U_{T} otimes U_{G})^*}} ,
      $$



      where $otimes$ accounts for the Kronecker product, $*$ is the Hermitian and $times$ is the Cartesian product.



      I am confused how to obtain the results in blue and red. Would you please help me to clarify them?







      linear-algebra kronecker-product






      share|cite|improve this question















      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Jan 3 at 6:29







      Amin

















      asked Jan 3 at 4:08









      AminAmin

      1,3281719




      1,3281719






















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