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Ned Nedialkov wrote:
On Nov 22, 2010, at 4:14 AM, Arnold Neumaier wrote:
The credible alternative is to require only the three predicates subset, interior, and disjoint (and perhaps equal).As a person that has written quite a bit of interval software, I would say that subset, interior, equal, and not equal must be present.
Just curious: Where did you need that two intervals are distinct?