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Posted to user@commons.apache.org by Stefan Hubert <st...@gmail.com> on 2016/04/15 14:30:39 UTC
[MATH] Ordinary differential equations - stiff solver
Hi everybody!
I am curious if a support for solving stiff ordinary differential equations
is planned in future?
There are a lot of them available for Fortran 77 (e. g.
https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html). I do
have a direct Java translation of LSODE, maybe this helps to get started?
Best,
Stefan
Re: [MATH] Ordinary differential equations - stiff solver
Posted by Stefan Hubert <st...@gmail.com>.
Hi Giles,
Thanks for letting me know. I will see how I can get this thing started :)
Best,
Stefan
On Sat, Apr 23, 2016 at 5:32 AM, Gilles <gi...@harfang.homelinux.org>
wrote:
> Hi.
>
> There is also a long-pending issue on that subject:
> https://issues.apache.org/jira/browse/MATH-172
>
> Regards,
> Gilles
>
>
>
> On Thu, 21 Apr 2016 02:55:42 +0200, Gilles wrote:
>
>> Hi.
>>
>> On Fri, 15 Apr 2016 21:41:32 -0400, Stefan Hubert wrote:
>>
>>> Hello Gilles,
>>>
>>> the Java code I have from LSODA is from a C-Code translation, which was
>>> at
>>> MIT license.
>>>
>>> I would definitely offer the LSODA Java code I already have, to get
>>> things
>>> started. Is anyone else interested in starting this project? How can we
>>> start it?
>>>
>>
>> You could post a proposal on the "dev" ML.
>> But you should be ready to make most of the adaptation work; Commons Math
>> is a project that needs contributors... :-}
>>
>> Best,
>>> Stefan
>>>
>>>
>>>
>>> On Fri, Apr 15, 2016 at 9:00 AM, Gilles <gi...@harfang.homelinux.org>
>>> wrote:
>>>
>>> Hello.
>>>>
>>>> On Fri, 15 Apr 2016 08:30:39 -0400, Stefan Hubert wrote:
>>>>
>>>> Hi everybody!
>>>>>
>>>>> I am curious if a support for solving stiff ordinary differential
>>>>> equations
>>>>> is planned in future?
>>>>>
>>>>> There are a lot of them available for Fortran 77 (e. g.
>>>>>
>>>>> https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html). I
>>>>> do
>>>>> have a direct Java translation
>>>>>
>>>>>
>>>> We should be wary of direct translations, as they are no more
>>>> understandable
>>>> than the original source.
>>>> Commons Math, being implemented in _pure_ Java, should be an
>>>> object-oriented
>>>> library.
>>>>
>>>> of LSODE,
>>>>
>>>>>
>>>>>
>>>> Unless I'm mistaken, there is no license.
>>>>
>>>> maybe this helps to get started?
>>>>
>>>>>
>>>>>
>>>> Yes, if you are willing to use it as a reference implementation of a
>>>> new,
>>>> independent, free, object-oriented version of the functionality.
>>>>
>>>> Best regards,
>>>> Gilles
>>>>
>>>>
>>>> Best,
>>>>> Stefan
>>>>>
>>>>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>
>
Re: [MATH] Ordinary differential equations - stiff solver
Posted by Gilles <gi...@harfang.homelinux.org>.
Hi.
There is also a long-pending issue on that subject:
https://issues.apache.org/jira/browse/MATH-172
Regards,
Gilles
On Thu, 21 Apr 2016 02:55:42 +0200, Gilles wrote:
> Hi.
>
> On Fri, 15 Apr 2016 21:41:32 -0400, Stefan Hubert wrote:
>> Hello Gilles,
>>
>> the Java code I have from LSODA is from a C-Code translation, which
>> was at
>> MIT license.
>>
>> I would definitely offer the LSODA Java code I already have, to get
>> things
>> started. Is anyone else interested in starting this project? How can
>> we
>> start it?
>
> You could post a proposal on the "dev" ML.
> But you should be ready to make most of the adaptation work; Commons
> Math
> is a project that needs contributors... :-}
>
>> Best,
>> Stefan
>>
>>
>>
>> On Fri, Apr 15, 2016 at 9:00 AM, Gilles
>> <gi...@harfang.homelinux.org>
>> wrote:
>>
>>> Hello.
>>>
>>> On Fri, 15 Apr 2016 08:30:39 -0400, Stefan Hubert wrote:
>>>
>>>> Hi everybody!
>>>>
>>>> I am curious if a support for solving stiff ordinary differential
>>>> equations
>>>> is planned in future?
>>>>
>>>> There are a lot of them available for Fortran 77 (e. g.
>>>>
>>>> https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html).
>>>> I do
>>>> have a direct Java translation
>>>>
>>>
>>> We should be wary of direct translations, as they are no more
>>> understandable
>>> than the original source.
>>> Commons Math, being implemented in _pure_ Java, should be an
>>> object-oriented
>>> library.
>>>
>>> of LSODE,
>>>>
>>>
>>> Unless I'm mistaken, there is no license.
>>>
>>> maybe this helps to get started?
>>>>
>>>
>>> Yes, if you are willing to use it as a reference implementation of
>>> a new,
>>> independent, free, object-oriented version of the functionality.
>>>
>>> Best regards,
>>> Gilles
>>>
>>>
>>>> Best,
>>>> Stefan
>>>>
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Re: [MATH] Ordinary differential equations - stiff solver
Posted by Gilles <gi...@harfang.homelinux.org>.
Hi.
There is also a long-pending issue on that subject:
https://issues.apache.org/jira/browse/MATH-172
Regards,
Gilles
On Thu, 21 Apr 2016 02:55:42 +0200, Gilles wrote:
> Hi.
>
> On Fri, 15 Apr 2016 21:41:32 -0400, Stefan Hubert wrote:
>> Hello Gilles,
>>
>> the Java code I have from LSODA is from a C-Code translation, which
>> was at
>> MIT license.
>>
>> I would definitely offer the LSODA Java code I already have, to get
>> things
>> started. Is anyone else interested in starting this project? How can
>> we
>> start it?
>
> You could post a proposal on the "dev" ML.
> But you should be ready to make most of the adaptation work; Commons
> Math
> is a project that needs contributors... :-}
>
>> Best,
>> Stefan
>>
>>
>>
>> On Fri, Apr 15, 2016 at 9:00 AM, Gilles
>> <gi...@harfang.homelinux.org>
>> wrote:
>>
>>> Hello.
>>>
>>> On Fri, 15 Apr 2016 08:30:39 -0400, Stefan Hubert wrote:
>>>
>>>> Hi everybody!
>>>>
>>>> I am curious if a support for solving stiff ordinary differential
>>>> equations
>>>> is planned in future?
>>>>
>>>> There are a lot of them available for Fortran 77 (e. g.
>>>>
>>>> https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html).
>>>> I do
>>>> have a direct Java translation
>>>>
>>>
>>> We should be wary of direct translations, as they are no more
>>> understandable
>>> than the original source.
>>> Commons Math, being implemented in _pure_ Java, should be an
>>> object-oriented
>>> library.
>>>
>>> of LSODE,
>>>>
>>>
>>> Unless I'm mistaken, there is no license.
>>>
>>> maybe this helps to get started?
>>>>
>>>
>>> Yes, if you are willing to use it as a reference implementation of
>>> a new,
>>> independent, free, object-oriented version of the functionality.
>>>
>>> Best regards,
>>> Gilles
>>>
>>>
>>>> Best,
>>>> Stefan
>>>>
---------------------------------------------------------------------
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Re: [MATH] Ordinary differential equations - stiff solver
Posted by Gilles <gi...@harfang.homelinux.org>.
Hi.
On Fri, 15 Apr 2016 21:41:32 -0400, Stefan Hubert wrote:
> Hello Gilles,
>
> the Java code I have from LSODA is from a C-Code translation, which
> was at
> MIT license.
>
> I would definitely offer the LSODA Java code I already have, to get
> things
> started. Is anyone else interested in starting this project? How can
> we
> start it?
You could post a proposal on the "dev" ML.
But you should be ready to make most of the adaptation work; Commons
Math
is a project that needs contributors... :-}
> Best,
> Stefan
>
>
>
> On Fri, Apr 15, 2016 at 9:00 AM, Gilles
> <gi...@harfang.homelinux.org>
> wrote:
>
>> Hello.
>>
>> On Fri, 15 Apr 2016 08:30:39 -0400, Stefan Hubert wrote:
>>
>>> Hi everybody!
>>>
>>> I am curious if a support for solving stiff ordinary differential
>>> equations
>>> is planned in future?
>>>
>>> There are a lot of them available for Fortran 77 (e. g.
>>> https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html).
>>> I do
>>> have a direct Java translation
>>>
>>
>> We should be wary of direct translations, as they are no more
>> understandable
>> than the original source.
>> Commons Math, being implemented in _pure_ Java, should be an
>> object-oriented
>> library.
>>
>> of LSODE,
>>>
>>
>> Unless I'm mistaken, there is no license.
>>
>> maybe this helps to get started?
>>>
>>
>> Yes, if you are willing to use it as a reference implementation of a
>> new,
>> independent, free, object-oriented version of the functionality.
>>
>> Best regards,
>> Gilles
>>
>>
>>> Best,
>>> Stefan
>>>
---------------------------------------------------------------------
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Re: [MATH] Ordinary differential equations - stiff solver
Posted by Stefan Hubert <st...@gmail.com>.
Hello Gilles,
the Java code I have from LSODA is from a C-Code translation, which was at
MIT license.
I would definitely offer the LSODA Java code I already have, to get things
started. Is anyone else interested in starting this project? How can we
start it?
Best,
Stefan
On Fri, Apr 15, 2016 at 9:00 AM, Gilles <gi...@harfang.homelinux.org>
wrote:
> Hello.
>
> On Fri, 15 Apr 2016 08:30:39 -0400, Stefan Hubert wrote:
>
>> Hi everybody!
>>
>> I am curious if a support for solving stiff ordinary differential
>> equations
>> is planned in future?
>>
>> There are a lot of them available for Fortran 77 (e. g.
>> https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html). I do
>> have a direct Java translation
>>
>
> We should be wary of direct translations, as they are no more
> understandable
> than the original source.
> Commons Math, being implemented in _pure_ Java, should be an
> object-oriented
> library.
>
> of LSODE,
>>
>
> Unless I'm mistaken, there is no license.
>
> maybe this helps to get started?
>>
>
> Yes, if you are willing to use it as a reference implementation of a new,
> independent, free, object-oriented version of the functionality.
>
> Best regards,
> Gilles
>
>
>> Best,
>> Stefan
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@commons.apache.org
> For additional commands, e-mail: user-help@commons.apache.org
>
>
Re: [MATH] Ordinary differential equations - stiff solver
Posted by Gilles <gi...@harfang.homelinux.org>.
Hello.
On Fri, 15 Apr 2016 08:30:39 -0400, Stefan Hubert wrote:
> Hi everybody!
>
> I am curious if a support for solving stiff ordinary differential
> equations
> is planned in future?
>
> There are a lot of them available for Fortran 77 (e. g.
> https://people.sc.fsu.edu/~jburkardt/f77_src/odepack/odepack.html). I
> do
> have a direct Java translation
We should be wary of direct translations, as they are no more
understandable
than the original source.
Commons Math, being implemented in _pure_ Java, should be an
object-oriented
library.
> of LSODE,
Unless I'm mistaken, there is no license.
> maybe this helps to get started?
Yes, if you are willing to use it as a reference implementation of a
new,
independent, free, object-oriented version of the functionality.
Best regards,
Gilles
>
> Best,
> Stefan
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