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  1. identity matrix

    • n.
      a square matrix in which all the elements of the principal diagonal are ones and all other elements are zeros. The effect of multiplying a given matrix by an identity matrix is to leave the given matrix unchanged.
    • noun: identity matrix, plural noun: identity matrices

    • 更多解釋
    • n.
      a square matrix in which all the elements of the principal diagonal are ones and all other ...

    Oxford Dictionary

  2. 知識+

    • 工程數學的問題 矩陣 正交? 幫幫忙

      ...的轉置矩陣 (也就是把 A 裡面的數值所在的行與列掉換.) I 是 identity matrix 單位矩陣. 除了對角線上是 1 之外, 其他所有數值都是 0. 所以這題, 你必須...