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Mathematics of Computation

Published by the American Mathematical Society since 1960 (published as Mathematical Tables and other Aids to Computation 1943-1959), Mathematics of Computation is devoted to research articles of the highest quality in computational mathematics.

ISSN 1088-6842 (online) ISSN 0025-5718 (print)

The 2020 MCQ for Mathematics of Computation is 1.78.

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On mixed and componentwise condition numbers for Moore–Penrose inverse and linear least squares problems
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by Felipe Cucker, Huaian Diao and Yimin Wei PDF
Math. Comp. 76 (2007), 947-963 Request permission

Abstract:

Classical condition numbers are normwise: they measure the size of both input perturbations and output errors using some norms. To take into account the relative of each data component, and, in particular, a possible data sparseness, componentwise condition numbers have been increasingly considered. These are mostly of two kinds: mixed and componentwise. In this paper, we give explicit expressions, computable from the data, for the mixed and componentwise condition numbers for the computation of the Moore–Penrose inverse as well as for the computation of solutions and residues of linear least squares problems. In both cases the data matrices have full column (row) rank.
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Additional Information
  • Felipe Cucker
  • Affiliation: Department of Mathematics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, P.R. of China
  • Email: macucker@math.cityu.edu.hk
  • Huaian Diao
  • Affiliation: Department of Mathematics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, P.R. of China
  • Email: 50007445@student.cityu.edu.hk
  • Yimin Wei
  • Affiliation: School of Mathematical Sciences, Fudan University, Shanghai 200433 and Key Laboratory of Mathematics for Nonlinear Sciences (Fudan University), Ministry of Education, P.R. of China
  • Email: ymwei@fudan.edu.cn
  • Received by editor(s): July 21, 2005
  • Received by editor(s) in revised form: November 23, 2005
  • Published electronically: November 2, 2006
  • Additional Notes: The first author was partially supported by City University SRG grant 7001860.
    The third author was partially supported by the National Natural Science Foundation of China under grant 10471027 and Shanghai Education Committee.
  • © Copyright 2006 American Mathematical Society
    The copyright for this article reverts to public domain 28 years after publication.
  • Journal: Math. Comp. 76 (2007), 947-963
  • MSC (2000): Primary 15A09, 15A12; Secondary 65F35
  • DOI: https://doi.org/10.1090/S0025-5718-06-01913-2
  • MathSciNet review: 2291844