本文研究了单位积决定的若当矩阵代数M=Mn(R)的条件及分类问题.利用基矩阵及巧妙对对称双线性映射{·,·}进行构造和扩充,用初等矩阵的方法,获得了一系列新的同样重要的定义,结论与证明(与参考文献[1]相比较),推广了参考文献[1]的结论,作为其应用可以进一步证明了Mn(R)上的任意可逆线性映射都是保单位积的.
In this paper, we investigate the condition and classification of the identity product determined Jordan matrix algebras M = Mn(R). Using the base matrix and the symmetric bilinear map {.,.} skillfully constructed for this purpose and expansion, only elementary matrix method is used. Comparing to the reference [1], we obtain a new series of equally important definition, conclusions and proof improving the conclusions of the reference [1]. As an application we characterize the invertible linear maps on A/I which preserve identity (Jordan) product.