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Allen's Interval Algebra
- jayajay 10y agoAwesome... I found this on December 17th: https://www.research.ibm.com/haifa/ponderthis/challenges/January2001.html https://www.research.ibm.com/haifa/ponderthis/challenges/Jan... I can't remember if I stumbled upon that from HN or not, but it's a neat little problem to think about, and seems like it would have been nice to see Allen's algebra at the time.