Re: [eigen] [PATCH] Toeplitz matrix specialization |

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On Thu, 29 Jan 2009, Gael Guennebaud wrote:

to start the debate I put some thougths on the wiki:
http://eigen.tuxfamily.org/index.php?title=SpecialMatrix

`Does "we assume we don't need a special class for triangular storage" mean
``that triangular matrices are stored as general matrices (and thus half the
``memory is wasted)? That strikes me as an assumption that could be
``regretted later. So perhaps we should make sure that a special class for
``triangular storage can be added later.
`

`One other usage scenario, of which I'm wondering how difficult it would be
``to implement in the current setting, is in-place LU decomposition (that
``is, replace the matrix A by its L and U factors, so that you don't need to
``allocate extra memory except for the permutation vector).
`
Cheers,
Jitse