On Newton's method and Halley's method for the principal $p$th root of a matrix

dc.contributor.authorGuo, Chun-Hua
dc.date.accessioned2014-04-27T23:47:37Z
dc.date.available2014-04-27T23:47:37Z
dc.date.issued2010
dc.description.abstractIf $A$ is a matrix with no negative real eigenvalues and all zero eigenvalues of $A$ are semisimple, the principal $p$th root of $A$ can be computed by Newton's method or Halley's method, with a preprocessing procedure if necessary. We prove a new convergence result for Newton's method, and discover an interesting property of Newton's method and Halley's method in terms of series expansions. We explain how the convergence of Newton's method and Halley's method can be improved when the eigenvalues of $A$ are known or when $A$ is a singular matrix. We also prove new results on $p$th roots of $M$-matrices and $H$-matrices, and consider the application of Newton's method and Halley's method to find the principal $p$th roots of these special matrices.en_US
dc.description.authorstatusFacultyen_US
dc.description.peerreviewyesen_US
dc.description.sponsorshipNSERCen_US
dc.identifier.citationLinear Algebra Appl.en_US
dc.identifier.urihttps://hdl.handle.net/10294/5267
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.titleOn Newton's method and Halley's method for the principal $p$th root of a matrixen_US
dc.typeArticleen_US

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