Geodesic
On Conjugate Gradient Type Methods and Polynomial Preconditioners for a Class of Complex Non-Hermitian Matrices.
Numerische Mathematik, Tome 57 (1990) no. 6-7, pp. 285-312.

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Mots-clés : conjugate gradient methods, complex matrices, minimal residual property, Galerkin condition, Euclidean error minimization, error bounds, polynomial preconditioning, numerical experiments, Helmholtz equation 
@article{NUMA_1990__57_6-7_133450,
     author = {Roland Freund},
     title = {On {Conjugate} {Gradient} {Type} {Methods} and {Polynomial} {Preconditioners} for a {Class} of {Complex} {Non-Hermitian} {Matrices.}},
     journal = {Numerische Mathematik},
     pages = {285--312},
     publisher = {mathdoc},
     volume = {57},
     number = {6-7},
     year = {1990},
     zbl = {0702.65034},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133450/}
}
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Roland Freund. On Conjugate Gradient Type Methods and Polynomial Preconditioners for a Class of Complex Non-Hermitian Matrices.. Numerische Mathematik, Tome 57 (1990) no. 6-7, pp. 285-312. http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133450/