Indefinite Least Squares Problem with Quadratic Constraint and its Condition Numbers?
Received:August 21, 2018  Revised:February 15, 2019
Key Word: Indefinite least squares problem   Quadratic constraint   Normwise condition number   Mixed condition number   Componentwise condition number.  
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mahvish samar chongqing university mahvishsamar@hotmail.com 
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Abstract:
      In this paper, we consider the indefinite least squares problem with quadratic constraint and its condition numbers. The conditions under which the problem has the unique solution are first presented. Then, the normwise, mixed, and componentwise condition numbers for solution and residual of this problem are derived. Numerical example is also provided to illustrate these results.
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