(j3.2006) Liaison to IFIP WG 2.5
Wed Aug 22 16:35:17 EDT 2007
On Wed, 22 Aug 2007, Van Snyder wrote:
> On Wed, 2007-08-22 at 19:59 +0100, Lawrie Schonfelder wrote:
> > I thought intervals were about accuracy critical not performance
> > critical!
> In many applications, if performance costs 100 times as much, accuracy
> will be reluctantly sacrificed. Ultimately, the scientists will blame
> the software engineer for the situation.
> And interval arithmetic isn't just about accuracy. Some algorithms are
> not guaranteed to work, or are impossible altogether, in point
> arithmetic, while they are guaranteed to work in interval arithmetic.
> The poster child for this is global minimization.
While you're arguing about the goodness of interval arithmetic, I still
don't see the reason why it should be part of standard fortran. People
have written interval arithmetic packages using derived types and operator
overloading. As far as I can tell, the code ultimately generated would be
pretty much the same either way, particularly if the compiler is clever
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