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brent's method and numerical derivatives

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)

- numerical approximation of derivatives (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
_______________________________________

Christof,

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.

Josh

···

On Oct 6, 2016 4:42 AM, “cb” cb@gpi.uni-kiel.de wrote:

Dear all,

is someone aware of freely available and easy to plug in (OGS5) implementations of

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


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Hi Christoph,

you can find Brent’s method in 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)

- numerical approximation of derivatives
(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
_______________________________________

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void NsPol3 (double p, double q, double r, vector* roots)

···

On Thu, Oct 6, 2016 at 4:50 PM, Lars Bilke lars.bilke@ufz.de wrote:

Hi Christoph,

you can find Brent’s method in 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)

  • numerical approximation of derivatives

(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


You received this message because you are subscribed to the Google Groups “ogs-devs”

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Thanks guys!

  eos zbrent is the same as  gcc zbrent and is based on Numerical Recipes. This is the functio I want to replace.

I’ll try Lars and Ashoks suggestions.

Christof

···

On Thu, Oct 6, 2016 at 4:50 PM, Lars Bilke lars.bilke@ufz.de
wrote:

        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)

            > _______________________________________

            >

            > --

            > You received this message because you are subscribed to the Google Groups "ogs-devs"

            > group.

            > To unsubscribe from this group and stop receiving emails from it, send an email to ogs-devs+unsubscribe@googlegroups.com.

            > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).

            >



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