For example, if a is upper triangular, you can set opts.
举个例子，如果A矩阵是上三角矩阵，你能够调整选择。
A substance is through the primary transformation into an upper triangular matrix, the transformation matrix is a unit lower triangular matrix.
实质上是将A通过初等行变换变成一个上三角矩阵，其变换矩阵就是一个单位下三角矩阵。
In this paper, we characterize the linear operators preserving adjoint matrices on the Spaces of all matrices, symmetric matrices and upper triangular matrices over domain.
本文刻画了整环上的全矩阵空间、对称矩阵空间和上三角矩阵空间上保持伴随矩阵的线性算子的结构。
The exchangeable necessary and sufficient condition is given for a class upper triangular matrixes, and out of it, we have got a simple method of obtaining inverse matrixes.
给出了一类上三角形矩阵可交换的充要条件，并由此得到了求其逆矩阵的一种简便方法。
The authors characterize the forms of additive invertable operators preserving inverse matrix of the upper triangular matrix space over a field which characteristic is not 2 or 3 .
刻划了特征不为2及3的域上的上三角矩阵空间保逆矩阵的可逆加法算子的形式。
All the land tortoise species formed a tight cluster of points in the upper part of the triangle; all the water turtles cluster in the lower part of the triangular graph.
所有陆龟品种都在三角形的上部形成一个紧密的点群；所有的水龟都聚集在三角图的下方。
Often this part of the page is the triangular area in the upper-left corner.
这个区域就在页面左上角的三角地带。
This article gives a Formula for finding inverse matrices of upper (down) triangular matrix.
本文给出了上(下)三角形矩阵的一个求逆公式。
Conclusion. In most cases, the vertebral body shape is hemispherical in the upper part of the pedicle and triangular in the lower part of the pedicle.
结论：大多数的病例，椎弓根上半部的椎体外形为半球形，下半部为三角形。
A new method is proposed to calculate the temperature jump during high-speed wire finish rolling through upper-bound triangular velocity field.
提出了以上界三角形速度场计算高速线材精轧阶段温升的方法。
The protractor (3) with a triangular rule is arranged on a board and is fixed on the two sides on the upper part of the compasses through an elastic fixing clip (7).
板面上带有三角尺的量角器(3)通过弹性固定卡(7)固定在圆规的上部两侧。
The diamond drilling teeth covered with antiwear alloy are welded to the lower end of drilling body and a triangular drilling shank is welded to the upper end.
该钻头是在钻体的下端焊接着有一定耐磨性合金包镶金刚石的钻齿，上端焊接着钻柄。
The diamond drilling teeth covered with antiwear alloy are welded to the lower end of drilling body and a triangular drilling shank is welded to the upper end.
该钻头是在钻体的下端焊接着有一定耐磨性合金包镶金刚石的钻齿，上端焊接着钻柄。
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