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From Luc Maisonobe <>
Subject Re: [math] Releasing 2.0
Date Sat, 18 Jul 2009 18:38:40 GMT
Luc Maisonobe a écrit :
> Phil Steitz a écrit :
>> Looks like we are - at last - ready to cut 2.0.   All that remains is
>> 1)  resolve MATH-260 and MATH-261 (which I am +1 as marking fixed, based
>> on Luc's last changes)
> +1
>> 2)  push remaining unscheduled issues to 2.1
> Concerning MATH-268 I would consider closing it with won't fix and
> reopening it later if the user still wants it. This is a difficult and
> non-standard feature.
>> 3)  generate clirr report
>> 4)  enhance the maven-changes-report to create proper release notes
> 5) fix the last few bits in Adams-Bashforth and Adams-Moulton that still
> don't work ... Sorry for that but I'm still unhappy with the accuracy of
> these two integrators. I'm working on it. If somebody want to have a
> look at the implementation, please do. Be aware it is quite difficult. I
> have put in the class javadoc as much as I could to explain the
> underlying theory because I only found sparse documentation on the web
> and had to redevelop some equations myself.

I got it! It now seems to me the problem was numerical instability, not
an error in the equations or implementation. Step size growth should be
very slow for these integrators, I've changed the initial automatic
setting to a safer value.

Now there is nothing left on my side that would delay 2.0 anymore.

>> I will do the RM-ing if no one else wants to but would appreciate help
>> in writing a summary of API changes to add to the release notes.
> I can help on that. I'll first try once again to understand the problem
> with the integrator and if it takes too long I'll give up for a while
> and will put a notice for users that these are experimental
> implementations. Then I'll write a summary on the various API changes I
> know about (mainly ODE, optimization, root solvers and linear algebra).

Where do you want me to put such a summary ? I think the release notes
are automatically generated from the changes.xml file, so I probably
need to put it somewhere else.


> Luc
>> Phil
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