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Old 2015-11-15, 23:43   #3
jasonp
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Oct 2004

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Neither block Lanczos nor block Wiedemann have a tutorial article available that explains them step by step; also, neither are amenable to small examples, as both methods require a matrix several times larger than the block size in order to need several iterations. Just making the block size 2 isn't safe either, as solving a matrix that small can work by random chance even if the implementation is broken.

Pretty much the only BW available that can scale to large problems is in CADO-NFS. Unfortunately scaling to large problems disqualifies the implementation for tutorial applications. The same is true of the BL code in Msieve.

Last fiddled with by jasonp on 2015-11-15 at 23:46
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