Higham, Nicholas J. and Relton, Samuel D. (2014) Estimating the Condition Number of the Frechet Derivative of a Matrix Function. SIAM Journal on Scientific Computing, 36 (6). C617C634. ISSN 10648275
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Abstract
The Fr\'{e}chet derivative $L_f$ of a matrix function $f \colon \mathbb{C}^{n\times n} \to \mathbb{C}^{n\times n}$ is used in a variety of applications and several algorithms are available for computing it. We define a condition number for the Fr\'{e}chet derivative and derive upper and lower bounds for it that differ by at most a factor $2$. For a wide class of functions we derive an algorithm for estimating the 1norm condition number that requires $O(n^3)$ flops given $O(n^3)$ flops algorithms for evaluating $f$ and $L_f$; in practice it produces estimates correct to within a factor $6n$. Numerical experiments show the new algorithm to be much more reliable than a previous heuristic estimate of conditioning.
Item Type:  Article 

Uncontrolled Keywords:  matrix function, condition number, Fr\'{e}chet derivative, Kronecker form, matrix exponential, matrix logarithm, matrix powers, matrix $p$th root, MATLAB, expm, logm, sqrtm 
Subjects:  MSC 2010, the AMS's Mathematics Subject Classification > 15 Linear and multilinear algebra; matrix theory MSC 2010, the AMS's Mathematics Subject Classification > 65 Numerical analysis 
Depositing User:  Nick Higham 
Date Deposited:  26 Nov 2014 
Last Modified:  20 Oct 2017 14:13 
URI:  https://eprints.maths.manchester.ac.uk/id/eprint/2197 
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Estimating the Condition Number of the Frechet Derivative
of a Matrix Function. (deposited 20 Dec 2013)
 Estimating the Condition Number of the Frechet Derivative of a Matrix Function. (deposited 26 Nov 2014) [Currently Displayed]
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