PREENVELOPE

作品数:8被引量:10H指数:1
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相关领域:理学更多>>
相关作者:陈建龙曾月迪平艳茹樊春燕姚海楼更多>>
相关机构:东南大学山东大学北京工业大学更多>>
相关期刊:《Algebra Colloquium》《Journal of Southeast University(English Edition)》《数学的实践与认识》《Acta Mathematica Scientia》更多>>
相关基金:国家自然科学基金国家教育部博士点基金北京市自然科学基金更多>>
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ON ALMOST PRECOVERS AND ALMOST PREENVELOPES
《Acta Mathematica Scientia》2006年第3期395-400,共6页毛立新 丁南庆 佟文廷 
This research was partially supported by the Specialized Research Fund for the Doctoral Program of Higher ducation of China (20020284009, 20030284033) NSF of China (10331030) Jiangsu Planned Projects for Postdoctoral Research Funds (0203003403)the Postdoctoral Research Funds of China (2006037713)and the Nanjing Institute of Technology of China.
Let C be a class of R-modules closed under isomorphisms and finite direct sums. It is first shown that the finite direct sum of almost C-precovers is an almost C-precover and the direct sum of an almost C-cover and a ...
关键词:Almost precover almost preenvelope 
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