A new concept of congruentmatrix is introduced in the paper and its equivalent transformations are discussed.
本文引进了同馀矩阵的新概念，并讨论了它的等价变换。
2
Both congruent and similarity of matrix are equivalence relations.
矩阵的合同关系、相似关系都是等价关系。
3
By means of congruent transformation in matrix, the method of transforming real quadratic form into standard form and the method of normal orthogonal basis are given in this paper.