principal diagonal

1. A determinant whose only nonzero elements occur in square blocks centered about the principal diagonal is in block-diagonal form.
   仅有的非零元素集中于主对角线的方块中的行列式是分块对角形式的。
2. New Calibration Method of Principal Distance of Star Sensors Through Diagonal Distance
   利用星角距对星敏感器主距进行标定的新方法
3. The main contribution of the paper is to put forward the principal diagonal dominant norm for determining coordination equilibrated situation.
   论文的主要贡献是提出一种新的判断协同均衡局势的主对角占优准则。

noun

1. the diagonal of a square matrix running from the upper left entry to the lower right entry

   Synonym:    main diagonal