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两个幂等元之和的可逆性 被引量:1

On the invertibility of the sum of idempotents
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摘要 研究在一个有单位元的环中的两个幂等元之和的可逆性问题,利用幂等元的性质,得到了两个幂等元之和可逆的几个充分必要条件,并给出了它们在矩阵环中的几个应用. The invertibility of the sum of two idempotents of a unitary ring is studied in this paper. Using properties of idempotents, we have shown several necessary and sufficient conditions for the invertibility of the sum of two idempotents, and have presented some applications to matrix rings.
作者 左可正
出处 《华中师范大学学报(自然科学版)》 CAS 北大核心 2014年第4期465-467,共3页 Journal of Central China Normal University:Natural Sciences
基金 国家自然科学基金项目(11272005) 湖北省教育厅重点项目(D20122202)
关键词 有单位元的环 幂等元 可逆性 矩阵环 unitary ring idempotents invertibility matrix ring
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参考文献10

  • 1Wimmer H K.Canonical angles of unitary spaces and perturbations of direct complements[J].Linear Alg Appl,1999,287:373-379.
  • 2Wimmer H K.Lipschitz continuity of obligne projections[J].Proc Amer Math Soc,2000,128:873-876.
  • 3RakocevicV.On the norm of idempotents in a Hilbert space[J].Amer Math Mothly,2000,107:745-750.
  • 4Groβ J,Trenkler G.Nonsingularity of the difference of two oblique projectors[J].SIAM J Matrix Anal Appl,1999,21:390-395.
  • 5Koliha J J,Rakoeevie V,Straskraba I.The difference and sum of projectors[J].Linear Algebra Appl,2004,388:279-288.
  • 6Koliha J J,RakoeevieV.The nullity and rank of linear combinations of idempotent matrices[J].Linear Algebra Appl,2006,418:11-14.
  • 7Zuo K.Nonsingularity of the difference and the sum of two idempotent matrices[J].Linear Algebra Appl,2010,433:476-482.
  • 8Koliha J J,RakoeevieV.Invertibility of the sum of idempotents[J].Linear Multil Algebra,2002,50:285-292.
  • 9左可正.关于幂等元之差的可逆性[J].数学杂志,2007,27(1):96-100. 被引量:9
  • 10Koliha J J,Rakocevid V.Invertibility of the difference of idempotents[J].Linear Multil Algebra,2003,51:97-110.

二级参考文献6

  • 1Gross J.,Trenkler G..Nonsingularity of the difference of two obligue projectors[J].SIAM J.Matrix Anal.Appl.1999,21(2):390-395.
  • 2Koliha J.J..Rakoevic V.Invertibility of the sum of idempotents[J].Linear Multil.Algebra,2002,50(4):285-292.
  • 3Koliha J.J.,Rakoevic V..Invertibility of the difference of idempotents[J].Linear Multil.Algebra,2003,51(1):97-100.
  • 4Rakocevic V..On the norm of idempotents in a Hilbert space[J].Amer.Math.Monthly,2000,107(8):748-750.
  • 5Wimmer H.K..Canonical angles of unitary spaces and perturbations of direct complements[J].Linear Alg.Appl.1999,287(3):373-379.
  • 6Wimmer H.K..Lipschitz continuity of obligue projections[J].Proc.Amer.Math.Soc.2000,128(3):873-876.

共引文献8

同被引文献5

  • 1Wimmer H K. Canonical angles of unitary spaces and perturbations of direct complements [ J ]. Linear Alg. Appl., 1999,287 : 373- 379.
  • 2Wimmer H K. Lipschitz continuity of obligne projections [J]. Proc Amer. Math. Soc., 2000,128(3):873-876.
  • 3Gross I, Trenkler G. Nonsingularity of the difference of two oblique projectors [ J]. SIAM. J. Matrix Anal. Appl., 2000,21 (2) : 390- 395.
  • 4Koliha J J, Rakocevic V. The nullity and rank of linear combinations of idempotent matrices [ J ]. Linear Algebra Appl., 2006,418 : 11-14.
  • 5Koliha J J ,Rakoeevic V,Straskraba I.The difference and sum of projectors[ J].Linear Algebra Appl., 2004,388:279-288.

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