In place ILU(0) factorization

[Laslo Tibor Diosady]

Hong,


> The space required remains the same, but
> the row-compressed matrix format
> for the factor will be changed with the
> reordering.
> To store the new format over the
> existing memory, temp space has to be allocated during
> implementation. Thus replacing the original memory with
> newly allocated space would make implementation easier.
>

I guess this depends upon the implementation of the ILU(0) factorization 
for the AIJ or BAIJ formats, which  I didn't (nor  do I ever really want 
to) look into.

Thanks for the help,

Laslo