In place ILU(0) factorization

[Laslo Tibor Diosady]

Thanks,

Laslo


On Tue, 8 Aug 2006, Hong Zhang wrote:

>
> Laslo,
>
> We figured out a way to implement ILU(0) with reordering
> without allocating workspace.
> We'll add this support later. I'll let you know when
> it is done.
>
> Thanks for your request that help us to make petsc
> better.
>
> Hong
>
> On Fri, 4 Aug 2006, Laslo Tibor Diosady wrote:
>
>> 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
>>
>>
>
>