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浙江大学学报(理学版)  2021, Vol. 48 Issue (6): 651-654    DOI: 10.3785/j.issn.1008-9497.2021.06.001
数学与计算机科学     
关于n-phantom-态射和n-Ext-phantom-态射的刻画
兰开阳, 卢博
西北民族大学 数学与计算机科学学院,甘肃 兰州 730030
Some characterizations of n-phantom morphisms and n-Ext-phantom morphisms
LAN Kaiyang, LU Bo
College of Mathematics and Computer Science, Northwest Minzu University, Lanzhou 730030, China
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摘要: n为正整数,讨论了模的短正合序列以及拉回图中态射的n-phantom性与n-Ext-phantom性。对正整数m?(m>n),研究了Torn-单态射与Torm-单态射以及Extn-满态射与Extm-满态射之间的关系;研究了Torn-单态射(Extn-满态射)与其示性态射之间的关系。
关键词: n-phantom-态射Torn-单态射Extn-满态射    
Abstract: Let n be a positive integer.We first discuss the n-phantom and n-Ext-phantom of morphisms in short exact sequence and pullback diagram of modules. Then, for a positive integer m?(m>n),the relationship between Torn-monomorphisms and Torm-monomorphisms (Extn-epimorphisms and Extm-epimorphisms) are studied; The relationship between Torn -monomorphisms (Extn-epimorphisms) and their character morphisms has been investigated.
Key words: n-phantom morphism    Torn-monomorphism    Extn-epimorphism
收稿日期: 2019-10-14
CLC:  O154.2  
基金资助: 甘肃省青年博士基金项目(2021QB-066);国家自然科学基金资助项目(12061061);中央高校基本科研业务经费项目(31920210082);西北民族大学创新团队项目(1110130131).
通讯作者: ORCID:https://orcid.org/0000-0003-1542-7384,E-mail:lubo55@126.com.     E-mail: lubo55@126.com
作者简介: 兰开阳(1995—),ORCID:https://orcid.org/0000-0002-2739-9053,男,博士研究生,主要从事同调代数与图论研;
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引用本文:

兰开阳, 卢博. 关于n-phantom-态射和n-Ext-phantom-态射的刻画[J]. 浙江大学学报(理学版), 2021, 48(6): 651-654.

LAN Kaiyang, LU Bo. Some characterizations of n-phantom morphisms and n-Ext-phantom morphisms. Journal of Zhejiang University (Science Edition), 2021, 48(6): 651-654.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2021.06.001        https://www.zjujournals.com/sci/CN/Y2021/V48/I6/651

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