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_______________________________________
Dr. Christof Beyer
Institute of Geosciences
Geohydromodelling
Christian-Albrechts-University Kiel
Ludewig-Meyn-Str. 10
24118 Kiel
Germany
Norbert put one in (brent) when he did the helmholtz equations of state. On the road now and can’t remember exactly where it is, but can look later. It’s in there, with the eos, probably called zbrent.
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_______________________________________
Dr. Christof Beyer
Institute of Geosciences
Geohydromodelling
Christian-Albrechts-University Kiel
Ludewig-Meyn-Str. 10
24118 Kiel
Germany
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Hi Christoph,
you can find Brent’s method in ThirdParty/Brent:
[https://github.com/ufz/ogs5/tree/master/ThirdParty/Brent](https://github.com/ufz/ogs5/tree/master/ThirdParty/Brent)
Best,
Lars
Am 6. Oktober 2016 um 13:42:19, cb (cb@gpi.uni-kiel.de ) schrieb:
> Dear all,
>
> is someone aware of freely available and easy to plug in (OGS5)
> implementations of
>
> - Brent's method
> ([http://www.aip.de/groups/soe/local/numres/bookcpdf/c9-3.pdf](http://www.aip.de/groups/soe/local/numres/bookcpdf/c9-3.pdf))
>
> - numerical approximation of derivatives
> ([http://www.it.uom.gr/teaching/linearalgebra/NumericalRecipiesInC/c5-7.pdf](http://www.it.uom.gr/teaching/linearalgebra/NumericalRecipiesInC/c5-7.pdf))
>
> Best, Christof
>
> --
> _______________________________________
> Dr. Christof Beyer
> Institute of Geosciences
> Geohydromodelling
> Christian-Albrechts-University Kiel
> Ludewig-Meyn-Str. 10
> 24118 Kiel
> Germany
>
> phone: +49(0)431-8803172
> fax: +49(0)431-8807606
> mobile: +49(0)176-24297908
> email: christof.beyer@gpi.uni-kiel.de
> home: [www.uni-kiel.de/ghm](http://www.uni-kiel.de/ghm)
> _______________________________________
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