Recent content by xiaoxiaoyu

  1. X

    A permutation group must be a euclidean group?

    Thank you very much for your explanation!
  2. X

    A permutation group must be a euclidean group?

    I don't think you follow my question. I mean All the permutations . So there is only one such permutation group.
  3. X

    A permutation group must be a euclidean group?

    All the perutations of elements in R(3)(three dimension euclidean space) form a permutation group. This group must be E(3)(euclidean group)?
  4. X

    Why E's representation marix is unit matrix

    I know this, but I don't know how to prove that exactly
  5. X

    Why E's representation marix is unit matrix

    In group representation theory, identity element's representation matrix is unit matrix. But why? Could you give me an exact explanation? Thany you.
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