Dimension of $J(F(GL_2(3)))$, where $J$ stands for Jacobson radical.












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I want to find dimension of $J(F(GL_2(3)))$, where $J$ stand for Jacobson radical, for the group algebra $F(GL_2(3))$ of general linear group of two by two matrices over the field $mathbb{Z}_3,$ and $F$ is any finite field of of characteristic $3.$ There are lots of results about dimension of Jacobson radical of group algebra in Karpilovsky book with title "Jacobson radical of group algebras." But i didn't find any way to find dimension of $J(F(GL_2(3)))$. By using GAP it’s dimension is equal to 20. But I don’t know is it . Please help me. Thanks.










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    $begingroup$


    I want to find dimension of $J(F(GL_2(3)))$, where $J$ stand for Jacobson radical, for the group algebra $F(GL_2(3))$ of general linear group of two by two matrices over the field $mathbb{Z}_3,$ and $F$ is any finite field of of characteristic $3.$ There are lots of results about dimension of Jacobson radical of group algebra in Karpilovsky book with title "Jacobson radical of group algebras." But i didn't find any way to find dimension of $J(F(GL_2(3)))$. By using GAP it’s dimension is equal to 20. But I don’t know is it . Please help me. Thanks.










    share|cite|improve this question











    $endgroup$















      1












      1








      1





      $begingroup$


      I want to find dimension of $J(F(GL_2(3)))$, where $J$ stand for Jacobson radical, for the group algebra $F(GL_2(3))$ of general linear group of two by two matrices over the field $mathbb{Z}_3,$ and $F$ is any finite field of of characteristic $3.$ There are lots of results about dimension of Jacobson radical of group algebra in Karpilovsky book with title "Jacobson radical of group algebras." But i didn't find any way to find dimension of $J(F(GL_2(3)))$. By using GAP it’s dimension is equal to 20. But I don’t know is it . Please help me. Thanks.










      share|cite|improve this question











      $endgroup$




      I want to find dimension of $J(F(GL_2(3)))$, where $J$ stand for Jacobson radical, for the group algebra $F(GL_2(3))$ of general linear group of two by two matrices over the field $mathbb{Z}_3,$ and $F$ is any finite field of of characteristic $3.$ There are lots of results about dimension of Jacobson radical of group algebra in Karpilovsky book with title "Jacobson radical of group algebras." But i didn't find any way to find dimension of $J(F(GL_2(3)))$. By using GAP it’s dimension is equal to 20. But I don’t know is it . Please help me. Thanks.







      radicals group-rings






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      edited Dec 14 '18 at 17:29







      neelkanth

















      asked Dec 14 '18 at 16:59









      neelkanthneelkanth

      2,15121028




      2,15121028






















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