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加法范畴中态射的Drazin逆 被引量:5

THE DRAZIN INVERSE OF A MORPHISM IN ADDITIVE CATEGORY
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摘要 本文研究了加法范畴上态射的 Drazin逆 .首先给出了态射和φ+η与态射φ有 Drazin逆的一个关系 ,得到了φ+η的 Drazin逆的一个公式 ,其次证明了态射φ有 Drazin逆当且仅当φk有群逆 (k为某一正整数 ) .最后还证明了 :如果 2为可逆态射 ,则具有 Drazin逆的态射一定为两个可逆态射之和 . In this paper, we investigate the Drazin inverse of a morphism in additive category. First, we give a relation of the Drazin inverse between the morphisms φ+η and φ , obtain a formula of the Drazin inverse of a morphism φ+η . Second, we prove that a morphism φ has the Drazin inverse if and only if φ k has a group inverse for some positive integer k . Last, if 2 is an invertible morphism and φ has the Drazin inverse, then φ is a sum of two invertible morphisms.
作者 游宏 陈建龙
出处 《数学杂志》 CSCD 北大核心 2002年第3期359-364,共6页 Journal of Mathematics
基金 国家自然科学基金项目 (1 0 1 71 0 1 1 ) 江苏省自然科学基金项目 (BK2 0 0 1 0 0 1 )
关键词 DRAZIN逆 群逆 态射 Drazin inverse group inverse morphism
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