摘要
In this paper the sufficient and necessary conditions are given for a formal triangular matrix ring to be right PP, generalized right PP, or semihereditary, respectively.
In this paper the sufficient and necessary conditions are given for a formal triangular matrix ring to be right PP, generalized right PP, or semihereditary, respectively.
基金
Partially supported by the Fund (KM200610005024) of Beijing Education Committee
the NNSF (10671061) of China.
