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Some Rank Equalities about Combinations of Two Idempotent Matrices 被引量:1

Some Rank Equalities about Combinations of Two Idempotent Matrices
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摘要 The paper researches the rank of combinations a PA+bAQ-cPAQ of two idempotent matrices P and Q.Using the properties of the idempotent matrix and elementary block matrix operation,we get some rank equalities for combinations a PA+bAQ-cPAQ of two idempotent matrices P and Q.These rank equalities generalize the results of Koliha J J,Rakoevi V and Tian Y,and give some applications of the rank equalities. The paper researches the rank of combinations a PA+bAQ-cPAQ of two idempotent matrices P and Q.Using the properties of the idempotent matrix and elementary block matrix operation,we get some rank equalities for combinations a PA+bAQ-cPAQ of two idempotent matrices P and Q.These rank equalities generalize the results of Koliha J J,Rakoevi V and Tian Y,and give some applications of the rank equalities.
作者 ZUO Kezheng
出处 《Wuhan University Journal of Natural Sciences》 CAS 2010年第5期380-384,共5页 武汉大学学报(自然科学英文版)
关键词 idempotent matrix RANK INVERTIBILITY RANGE null space idempotent matrix rank invertibility range null space
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同被引文献12

  • 1TIAN Y’STYAN G P H. Rank equalities for idempotent matrices with applications[J]. Journal of Computational and AppliedMathematics, 2006,191:7-97.
  • 2GROfi J ,TRENKLER G. Nonsingularity of the difference of two oblique projectors[J]. SIAM J Matrix Anal Appl, 2000, 21 :390-395.
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  • 4TIAN Y’STYAN G P H. Rank equalities for idempotent and involutory matrices [J]. Linear Algebra and Its Applications,2001,335:101-117.
  • 5TIAN Y. Rank equalities related to generalized Inverses of matrices and their applications[DB/OL]. [2011-08-06]. http://arxiv. org/abs math/0003224vl,2000-03-30:17-25.
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  • 8HWA-LONG GAU, CHIH-JEN WANG, NGAI-CHING WONG. Invertibility and fredholmness of linear combinations ofquadratic,^-potent and nilpotent operators[J]. Operators and Matrices,2008,2(2) : 193-199.
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  • 10KOLIHA J J,RAKOCEVIC V,STRASKRABA I. The difference and sum of projectors[J]. Linear Algebra Appl, 2004,388 :279-288.

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