中文摘要：

利用矩阵的Σ-K-L分解,研究了广义投影算子（A2=A＊）和超广义投影算子（A2=A＋）的性质,得到了一些新的特征,这些结论推广了Baksalary的有关结果.

英文摘要：

Using the decomposition of ∑-K-L of the matrix, we obtain several new prop- erties and characteristics of the generalized projectors（ A^2 = A^＊） and the hypergeneralized projectors（ A^2 = A^＋ ）, which generalize some related results of Baksalary.