Re: [boost] Re: Comments on Special functions, Quaternions, Octonions

From: Beman Dawes (bdawes_at_[hidden])
Date: 2001-05-30 16:18:09

At 05:30 AM 5/30/2001, Peter wrote:
 >Salut,
 >
 >On Wednesday 30 May 2001 00:06, you wrote:
 >> Hubert HOLIN wrote:
 >> > > Peter
 >> > >
 >> > > P.S: interval< octernion<double> > will be funny
 >> >
 >> >                 For that matter, what would interval< complex< 
float> >
 >> > mean?
 >>
 >> This doesn't make sense, because complex<T> is not ordered.  The way to
 >> do it is to use   octonion< interval<double > >   and
 >> complex< interval<double> >.  Except that the latter is not valid for
 >You're right, I've been using interval with Pascal-XSC only, there it's
 >just called cinterval.
 >
 >> std::complex, because it's not defined for general T.
 >>
 >> Jens Maurer
 >That's a pitty. I would like to use complex< interval<double> >  later
 >this year for some quantum mechanical calculations. Of course I can
 >create my own complex for that so it's not a real problem.
 >
 >Is this currently adressed by the commitee ? Or is there a
 >reason for it.

Not AFAIK.  Nothing on the issue list.

One of the problems the C++ committee used to have with numerics was lack 
of participation from the numerics community.  That seems to be changing; 
several people with a numerics background have joined the committee, many 
of whom are also participating in Boost.

So if you have specific defect reports on numerics issues, the committee is 
in a better position to address them that it used to be.  If you don't know 
how to prepare a defect report, email me privately or look at the 
comp.std.c++ FAQ.  The committee is also starting to talk about 
enhancements for a library technical report, details still up in the air.

--Beman