[ADOL-C] traceless mode for implicit function

[hg]

Dear Prof. Andrea Walther

That's exactly what I'm looking for. Thanks.

Giang

On Tue, Feb 27, 2018 at 10:55 AM, Andrea Walther <
andrea.walther at uni-paderborn.de> wrote:

> Dear Giang,
>
> I'm wondering if traceless forward mode derivatives are available for
>> implicit function,
>>
>
> no, so far the derivative computation for implicit functions is not
> covered by our traceless mode implementation.
>
> Using trace mode is quite difficult when the material law contains a large
>> number of parameters. I don't think assigning material parameters as an
>> independent variable is not a good idea. But it has a changing value
>> depending on the Cartesian coordinates.
>>
>
> In the current version of ADOL-C it is possible to use additional
> parameters that do not enter the computation as independent variables.
>
> Hence, they provide exactly the functionality that you are looking for,
> i.e., they are not active but the values of these parameters can be changed
> when computing derivatives.
>
> See the directory
>
> examples/additional_examples/param
>
> for an illustration of this functionality.
>
> Best regards
>
> Andrea
> --
> Prof. Dr. Andrea Walther
> Lehrstuhl fuer Mathematik und ihre Anwendungen
> Institut fuer Mathematik
> Universitaet Paderborn
> Warburger Str. 100
> 33098 Paderborn
>
> Email: andrea.walther at uni-paderborn.de
> Phone: ++49 5251 602721
> Fax:   ++49 5251 603728
>
> **********
>
>
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