2. Krylov's methods
2.1 Base construction
All these methods start from a given initial vector x 0 having n components. In general, x 0 = 0 or a vector with random components is chosen. The initial residual r 0 is defined by r 0 = b – Ax 0 . The Krylov space of order k constructed over A and r 0 and denoted (A, r 0 ...
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Krylov's methods
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