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相對于余撓對的內射模和投射模

2019-04-09 05:41何東林李煜彥
關鍵詞:東林隴南李煜

何東林,李煜彥

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相對于余撓對的內射模和投射模

*何東林,李煜彥

(隴南師范高等??茖W校數信學院,甘肅,隴南 742500)

設=(C,F)是一個完全的遺傳的余撓對。給出--內射模和是--投射模的概念,研究--內射模和--投射模的若干性質和等價刻畫。

余撓對;--內射模;--投射模

1 預備知識

2 t -子模

3 相對于余撓對的內射模

由上面的引理易得如下兩個推論。

證明 對任意正合列

由上面的定理易得如下推論。

4 相對于余撓對的投射模

由上面的定理易得如下推論。

[1] Mao L X, Ding N Q. FP-projective dimensions[J]. Comm Algebra, 2005, 33(4):1153-1170.

[2] Mao L X, Ding N Q. Relative projective modules and relative injective modules[J]. Comm. Algebra, 2006, 34: 2403-2418.

[3] Holm H. Gorenstein homological dimensions[J]. Journal of pure and applied algebra, 2004, 189(1-3): 167-193.

[4] Bennis D, Mahdou N. Strongly Gorenstein projective, injective, and flat modules[J]. Journal of Pure and Applied Algebra, 2007, 210(2): 437-445.

[5] Abbas M S. On relative pure injective modules[J]. Al-Mustansiriyah Journal of Science, 2010, 21(6): 374-382.

[6] Wang L. Strongly n-Ding projective and injective modules under change of rings[J]. International Research Journal of pure Algebra, 2017, 7(3): 509-512.

[7] Abbas M S, Hamid M F. Pure Injective Modules Relative to Torsion Theories[J]. International Journal of Algebra, 2014, 8(4): 187-194.

[8] Anderson F W, Fuller K R. Rings and categories of modules[M]. Springer: SpringerScience & Business Media, 2012.

[9] Enochs E E, Jenda O M G. Relative homological algebra [M]. New York: Walter de Gruyter, 2000.

[10] 佟文廷.同調代數引論[M].北京:高等教育出版社,1996.

Injective and projective modules relative to cotorsion pair

*HE Dong-lin, LI Yu-yan

(Department of Mathematics, Longnan Teachers College, Longnan, Gansu 742500, China)

cotorsion pair;--injective modules;--projective modules

O153

A

10.3969/j.issn.1674-8085.2019.02.001

1674-8085(2019)02-0001-05

2018-12-03;

2019-01-26

甘肅省高等學??蒲许椖?2018A-269),隴南師范高等??茖W校校級科研重點項目(2016LSZK01003)

*何東林(1983-),女,甘肅白銀人,講師,碩士,主要從事同調代數研究(E-mail: hdl7979085@163.com);

李煜彥(1983-),男,甘肅西和人,講師,碩士,主要從事環模理論研究(E-mail: nwnulyy@126.com).

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