55 research outputs found
Fast linear algebra is stable
In an earlier paper, we showed that a large class of fast recursive matrix
multiplication algorithms is stable in a normwise sense, and that in fact if
multiplication of -by- matrices can be done by any algorithm in
operations for any , then it can be done
stably in operations for any . Here we extend
this result to show that essentially all standard linear algebra operations,
including LU decomposition, QR decomposition, linear equation solving, matrix
inversion, solving least squares problems, (generalized) eigenvalue problems
and the singular value decomposition can also be done stably (in a normwise
sense) in operations.Comment: 26 pages; final version; to appear in Numerische Mathemati
THEORETICAL AND PRACTICAL ASPECTS OF AROMA RETENTION IN SPRAY DRYING AND FREEZE DRYING
Contribuição ao protocolo de monitoramento ambiental da maricultura de Kappaphycus alvarezii (Doty) Doty ex P.C. Silva (Areschougiaceae - Rhodophyta) na baía de Sepetiba, RJ, Brasil
International consensus statement on nomenclature and classification of the congenital bicuspid aortic valve and its aortopathy, for clinical, surgical, interventional and research purposes
This International Consensus Classification and Nomenclature for the congenital bicuspid aortic valve condition recognizes 3 types of bicuspid valves: 1. The fused type (right-left cusp fusion, right-non-coronary cusp fusion and left-non-coronary cusp fusion phenotypes); 2. The 2-sinus type (latero-lateral and antero-posterior phenotypes); and 3. The partial-fusion (forme fruste) type. The presence of raphe and the symmetry of the fused type phenotypes are critical aspects to describe. The International Consensus also recognizes 3 types of bicuspid valve-associated aortopathy: 1. The ascending phenotype; 2. The root phenotype; and 3. Extended phenotypes.Cardiolog
Machining performance optimisation of MQL-assisted turning of Inconel-825 superalloy using GA for industrial applications
Machining performance optimisation of MQL-assisted turning of Inconel-825 superalloy using GA for industrial applications
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