兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (4): 144-151.

• 数理科学 • 上一篇    下一篇

三角矩阵环上FC-投射模的刻画

吴德军*, 付家慧   

  1. 兰州理工大学 理学院, 甘肃 兰州 730050
  • 收稿日期:2021-05-06 出版日期:2022-08-28 发布日期:2022-10-09
  • 通讯作者: 吴德军(1978-),男,甘肃金昌人,博士,教授.Email:39666867@qq.com
  • 基金资助:
    国家自然科学基金(11761047)

A characterization of FC-projective modules over triangular matrix rings

WU De-jun, FU Jia-hui   

  1. School of Science, Lanzhou Univ. of Tech., Lanzhou 730050, China
  • Received:2021-05-06 Online:2022-08-28 Published:2022-10-09

摘要: T=A0UB是形式三角矩阵环,其中A,B是环,U是(B,A)-双模. 给出了有限余生成左T-模和有限余表示左T-模在形式三角矩阵环上的等价刻画, 进而给出了形式三角矩阵环T上FC-投射左T-模的刻画.作为应用,讨论了左T-模的FC-投射维数.

关键词: FC-投射模, 余诺特环, FC-投射维数

Abstract: Let T=A0 UB be a formal triangular matrix ring, where A and B are rings and U is a (B, A)-bimodule. Equivalent characterizations of left T-modules of finite cogeneration and finite corepresentation on the formal triangular matrix ring are given. Furthermore, a characterization of FC-projective left T-modules over the formal triangular matrix ring is given. As an application, the FC-projective dimensions of left T-modules are discussed.

Key words: FC-projective module, co-noetherian ring, FC-projective dimension

中图分类号: