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Re: P1788: Motion 26 PLEASE VOTE



On 08/16/2011 09:20 PM, Chenyi Hu wrote:
Thanks Nate! Yes, set operation was my main concern.

- Chenyi

"Nate Hayes"<nh@xxxxxxxxxxxxxxxxx>  8/16/2011 9:50 AM>>>
John Pryce wrote:
On 15 Aug 2011, at 14:35, Chenyi Hu wrote:
I vote no on this motion.

However, I would vote yes if the description of the motion assures that
proposed decorations will assure reliability repeatedly (i.e. on the same
and different machines the intervals contain the solution although the
intervals may not be the same exactly.)

It does assure that.

Assuming no intersection or union operations are present.
Otherwise all bets are off.

According to Motion 26, union and intersection yield an undecorated result. This can be further processed with undecorated interval arithmetic, as has been the case in the past 50 years. Thus things are as safe as they always have been.


Arnold Neumaier