by Federico Greco, Bruno Iannazzo, Federico Poloni
Reference:
The Padé iterations for the matrix sign function and their reciprocals are optimal (Federico Greco, Bruno Iannazzo, Federico Poloni), In Linear Algebra Appl., volume 436, 2012.
Bibtex Entry:
@ARTICLE{GreIP12,
author = {Greco, Federico and Iannazzo, Bruno and Poloni, Federico},
title = {The {P}ad\'e iterations for the matrix sign function and their reciprocals
are optimal},
journal = {Linear Algebra Appl.},
year = {2012},
volume = {436},
pages = {472--477},
number = {3},
coden = {LAAPAW},
doi = {10.1016/j.laa.2011.04.016},
fjournal = {Linear Algebra and its Applications},
issn = {0024-3795},
mrclass = {15A24 (41A21 65F60)},
mrnumber = {2854885},
pdf = {files2/GreIP12_arxiv.pdf},
url = {http://dx.doi.org/10.1016/j.laa.2011.04.016}
}