Discussion related to cado-nfs

[Jhon Alejandro M <alejandromelo@unicauca.edu.co>]

Mr Zimmermann

Your answer has been great very helpful. I have successfully executed block wiedemann algorithm with matrices greater than 100 rows per 100 columns, but with smaller matrices, the following error appears

-The current code expects a column permutation replicated on rows, not the converse. There is little adaptation work, but yet to be done. Maybe you could pass "--reorder columns" to mf_bal ?

I don't understand the message error.  ¿How can I solve it?  or ¿Why does the error appears?

by last. I have been trying to understand the output files of bwc but I don`t understand the output format. ¿How should I interpret the K.sols file <s1> - <s2>. <J> .txt? I am trying to solve matrices GF(2) but in the output appears hex numbers

Thanks and Regard

Jhon Melo

El mié., 21 nov. 2018, 3:55 a. m., paul zimmermann <Paul.Zimmermann@inria.fr> escribió:

       Hi Jhon,

> From: Jhon Alejandro M <alejandromelo@unicauca.edu.co>
> Date: Tue, 20 Nov 2018 16:31:06 -0500
>
> Hello, my name is Jhon. I am university student of Universidad del cauca. I
> am implementing Quadratic Sieve algorithm. I am trying to implement Block
> Wiedemann algorithm. ¿Can I run just the block-wiedemann part of cado-nfs?
> and ¿Exist any example?
>
> Thanks and Regard
> Jhon Melo
> Universidad del Cauca Colombia

the simplest way to get an example is to run the README example:

$ export CADO_DEBUG=true
$ ./cado-nfs.py 90377629292003121684002147101760858109247336549001090677693 workdir=/tmp/c60

Then look at /tmp/c60/c60.bwc.stdout.1: its first line contains an example of
command line of bwc.pl, the Perl script that calls Block Wiedemann.

Additional documentation can be found in linalg/bwc/README.

Best regards,
Paul Zimmermann

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