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Otro precondicionador<br />

Otro precondicionador<br />

M. J. Grote, T. Huckle. Parallel preconditioning with sparse approximate inverses. SIAM Journal<br />

of Scientific Computing, Vol. 18-3, pp. 838–853, 1997.<br />

También parte de minimizar por submatrices de A<br />

factorizando la matriz A<br />

donde R es una matriz triangular superior.<br />

Sea c=Q T e j, la solución de (2) es<br />

min∥e<br />

j−<br />

m j<br />

A m j∥2, (2)<br />

A=Q R<br />

0 ,<br />

m j =R −1 c.<br />

11/10/11 25/27

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