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Michel Hack wrote:
In conclusion, I think this issue needs to be resolved strictly in the Interval Arithmetic context. There is no sensible FP equivalent. We may need FP-primitive assistance along the lines discussed by Arnold Neumaier and Ian McIntosh -- but we must not try to assign FloatingPoint semantics to it.
...although whatever we come up with will likely be much more "sellable" to the rest of the world if at least it also provides some (future) benefit to floating-point. So we should at least keep that in the back of our minds when trying to consider what will work best for "us".
Nate Hayes