Embedding of Riemannian symmetric spaces $E_I$ and $E_{IV}$ into $E_6$ Lie group












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In answer and comments to this mathoverflow question we have discussed possiblity of embedding Riemmanian symmetric spaces $E_I, E_{II}, E_{III},E_{IV}$ of dimension $42,40,32,26$ respectively into $E_6$ Lie group. Spaces $E_{II}$ and $E_{III}$ can be embedded as set $M={x^2=1}$ having $12$ and $16$ dimensions of eigenspaces with eigenvalue $-1$. Consider set $P={x^2 in E_{III}}$ in Lie group $E_6$. Is there chance to find $E_I$ or $E_{IV}$ in $P$ ?



The hint is $Spin_{10}$ subgroup and grassmanians which can be found in set ${x^2=-1}$ in Clifford algebra.










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    $begingroup$


    In answer and comments to this mathoverflow question we have discussed possiblity of embedding Riemmanian symmetric spaces $E_I, E_{II}, E_{III},E_{IV}$ of dimension $42,40,32,26$ respectively into $E_6$ Lie group. Spaces $E_{II}$ and $E_{III}$ can be embedded as set $M={x^2=1}$ having $12$ and $16$ dimensions of eigenspaces with eigenvalue $-1$. Consider set $P={x^2 in E_{III}}$ in Lie group $E_6$. Is there chance to find $E_I$ or $E_{IV}$ in $P$ ?



    The hint is $Spin_{10}$ subgroup and grassmanians which can be found in set ${x^2=-1}$ in Clifford algebra.










    share|cite|improve this question











    $endgroup$















      0












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      0





      $begingroup$


      In answer and comments to this mathoverflow question we have discussed possiblity of embedding Riemmanian symmetric spaces $E_I, E_{II}, E_{III},E_{IV}$ of dimension $42,40,32,26$ respectively into $E_6$ Lie group. Spaces $E_{II}$ and $E_{III}$ can be embedded as set $M={x^2=1}$ having $12$ and $16$ dimensions of eigenspaces with eigenvalue $-1$. Consider set $P={x^2 in E_{III}}$ in Lie group $E_6$. Is there chance to find $E_I$ or $E_{IV}$ in $P$ ?



      The hint is $Spin_{10}$ subgroup and grassmanians which can be found in set ${x^2=-1}$ in Clifford algebra.










      share|cite|improve this question











      $endgroup$




      In answer and comments to this mathoverflow question we have discussed possiblity of embedding Riemmanian symmetric spaces $E_I, E_{II}, E_{III},E_{IV}$ of dimension $42,40,32,26$ respectively into $E_6$ Lie group. Spaces $E_{II}$ and $E_{III}$ can be embedded as set $M={x^2=1}$ having $12$ and $16$ dimensions of eigenspaces with eigenvalue $-1$. Consider set $P={x^2 in E_{III}}$ in Lie group $E_6$. Is there chance to find $E_I$ or $E_{IV}$ in $P$ ?



      The hint is $Spin_{10}$ subgroup and grassmanians which can be found in set ${x^2=-1}$ in Clifford algebra.







      lie-groups symmetric-spaces






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      share|cite|improve this question













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      edited Jan 25 at 11:00







      Marek Mitros

















      asked Jan 23 at 14:49









      Marek MitrosMarek Mitros

      367212




      367212






















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