Claudio and JB. You both raised similar arguments about why the empty interval is basically the same whether it is [9:00, 9:00) or [10:00, 10:00), i.e. the important factor is that it's empty, not what it's end-point is.
if you look at the interval [9:00, 9:00) as the limit of [9:00, 9:00 + epsilon) as epsilon goes to zero, you have a situation where each of the intervals on the way to the limit (i.e. epsilon > 0) overlaps [9:00, 10:00) and is _not_ contained in [10:00, 11:00). i'm arguing that the limit [9, 9) should be interpreted in a way that is consistent with the behavior of the sequence that defines it [9, 9 + e). this is what i mean by _intuitive_ behavior. i.e. [9:00, 9:00) overlaps [9:00, 10:00) and is not contained in [10:00, 11:00). in any case, my proposed solution involves allowing both open and closed intervals. which results in a more complete and consistent set-theoretic framework for intervals. which it sounds like JB, at least, may favor. and as i said earlier, i already have a use case for closed intervals, so there's at least one person that needs them. i don't have one for open intervals yet, but i suspect there are valid use cases out there. regards, al Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Joda-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/joda-interest
