利用环上的可逆元素,给出环上(b,c)-逆的一些等价刻画及在一定条件下环上2×2矩阵的(B,C)-逆的表达式.
We gave some equivalent characterizations for the (b, c)-inverse by using invertibility of certain elements in a ring, and gave an expression for the (B,C)-inverse of a 2×2 matrix over a ring under certain conditions.