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## Main Question or Discussion Point

Hi!

I frequently have to solve systems of nonlinear equations with Fortran. So far I used a code which I didn't write by myself which is based on a Newtonian root finder from Numerical recipes.

I would like to write a Fortran code on my own, based on another Numerical subroutine available on the internet.

I found "Minipack" http://www.netlib.org/minpack/

But there are subroutines missing? I wanted to compile the testprogram file08.f (under link ex). In the description is said what is needed to include: MINPACK-SUPPLIED ... SPMPAR,ENORM,HYBRD1,INITPT,VECFCN . But there's no file spmpar.f on the above page to download!? If you run file08.f it consequently tells you that there are undefined references.

It needn't to be Minipack! I just want to get to a program over which I have "full control / overwiev". Is there a good documentation on the internet or a book on how to solve nonlinear equations with fortran?

Best regards, Martin

I frequently have to solve systems of nonlinear equations with Fortran. So far I used a code which I didn't write by myself which is based on a Newtonian root finder from Numerical recipes.

I would like to write a Fortran code on my own, based on another Numerical subroutine available on the internet.

I found "Minipack" http://www.netlib.org/minpack/

But there are subroutines missing? I wanted to compile the testprogram file08.f (under link ex). In the description is said what is needed to include: MINPACK-SUPPLIED ... SPMPAR,ENORM,HYBRD1,INITPT,VECFCN . But there's no file spmpar.f on the above page to download!? If you run file08.f it consequently tells you that there are undefined references.

It needn't to be Minipack! I just want to get to a program over which I have "full control / overwiev". Is there a good documentation on the internet or a book on how to solve nonlinear equations with fortran?

Best regards, Martin