[Haskell-cafe] low-cost matrix rank?

[Mike Meyer]

Noticing that diagrams 1.3 has moved from vector-space to linear, I decided
to check them both for a function to compute the rank of a matrix. Neither
seems to have it.

While I'm doing quite a bit of work with 2 and 3-element vectors, the only
thing I do with matrices is take their rank, as part of verifying that the
faces of a polyhedron actually make a polyhedron.

So I'm looking for a relatively light-weight way of doing so that will work
with a recent (7.8 or 7.10) ghc release. Or maybe getting such a function
added to an existing library. Anyone have any suggestions?

Thanks,
Mike
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