Grassman Algebra Spad Code

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Martin Baker

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Nov 18, 2009, 11:36:53 AM11/18/09
to FriCAS - computer algebra system
Bertfried (and anyone else interested in Grassman algebra),

> If you have code, please let me know...

Yes, I have now linked to the code on this page:

http://www.euclideanspace.com/maths/standards/program/clifford/

I have also put there, notes about what I have done already and what
remains to be done, along with test output and so on.

I should warn you that most of my time have been spent so far on the
nuts&bolts of getting things working in spad (All the small issues,
like I found that I needed to use NNI to index a vector and SINT to do
bitwise logic and since I needed to use the same integer for both I
had to work out when I needed to force a conversion) so I have had
very little time to understand the maths.

So this means that some of the algorithms don't give correct result
yet (especially non-diagonal case).

However, with that warning in mind, I would appreciate and feedback
about whether I am on the right track and any hints to help me
progress.

Thanks,

Martin
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