The lumped mass matrix is a diagonal matrix . 集中质量阵是一个对用阵。
The square matrix is called a diagonal matrix . 该方矩阵称为对角矩阵。
The n vertical planes are called diagonal plane . N个竖直的平面叫做等分面。
The rule on the move of a bishop on a chessboard is that it moves only on the diagonal . 象在棋盘中移动的规则是只许走对角线。
Use the vector dot product to find the obtuse angle between two diagonals of a cube . 用矢量点积求立方体的两条对角线所夹的钝角。
We showed that a determinant in diagonal form is equal to the product of the diagonal elements . 我们已证明一对角形行列式等于其对角元素的乘积。
The truss comprises four plane trusses each two panels and each panel has one diagonal brace . 桁架由四个平面桁架组成，每两个节间及每个节间均有对角撑。
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。
The catalan numbers also count the number of ways in which an n-gon can be dissected into triangles by nonintersecting diagonals . 加泰隆数还数计有多少方式来将多边形用不相交的对角线划分成三角形。
A determinant in which all elements are zero except the elements of the principal diagonal and the elements immediately above and below this diagonal is called a continuant . 一个行列式除了主对角元素以及紧靠对角线的上面和下面的元素外，所有的元素均为零者叫做连行列式。
