ffc team mailing list archive

[jhoffman@xxxxxxxxxxx]

> On Fri, Sep 02, 2005 at 09:43:16AM +0200, jhoffman@xxxxxxxxxxx wrote:
>> Anders,
>>
>> Some operations for Functions in FFC that would be very useful are:
>> multiplication, division, and powers, including taking the square root,
>> with the operations defined as the corresponding operations for the
>> nodal
>> values.
>
> What do you mean by multiplication? FFC already does
> multiplication. Do you mean interpolating a product w1*w2 to remove
> one of the factors in the output to reduce the complexity of evaluation?

Sorry, multiplication should not have been there.

>> Together with access to a local (cell) h in some form, I think we will
>> be
>> able to implement a wide range of solvers in Dolfin.
>>
>> /Johan
>
> I agree. All this will be added.
>
> There are a couple of things I need to implement in FFC. Which is the
> most important? Which should be implemented first?
>
> 1. Improve the expressiveness of the form language: division, powers,
> square root, predefined h, index ranges (for Garth), operators such as
> grad(), rot(), div(), unit tensor etc.
>
> 2. Boundary integrals using *ds.
>
> 3. Option -f blas for generating BLAS output (to speed up compilation of
> complicated forms).
>
> I should be able to start implementing one of these early next week.

I'd say: 1-3-2

/Johan