找出了单位矩阵的所有平方根。

Having found all square roots of an identity matrix.

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直接法中的平方根法，就是利用对称正定矩阵的三角分解而得到的求解对称正定方程组的一种有效方法。

Square root method is one of direct methods, which is an effective method for the solution of symmetrical positive liner equations through triangle decomposition of symmetrical positive matrix.

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最后还给出了求友循环矩阵主平方根矩阵的算法。

At last, an algorithm for computing the principal square-rooting matrix is given.

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