Re: Idempotence and "Replication Insensitivity" are equivalent ?
Date: 23 Sep 2006 02:04:49 -0700
Aloha Kakuikanu wrote:
> Jan Hidders wrote:
> > You'd split that into computing (minDate, maxDate) and then do some
> > post-processing. For (minDate, maxDate) you get:
> > - E = (null, null)
> > - S(d) = (d,d)
> > - A((d1, d2), (d3, d4)) = (MIN(d1, d3), MAX(d2, d4))
> > with MIN and MAX defined such that MIN(d, null) = MIN(null, d) = MAX(d,
> > null) = MAX(null, d) = d.
> This null thingy doesn't make sence:
Nulls rarely do. In this case I was only concerned with defining an example of (E,S,A), so I don't care my MIN and MAX don't satisify the law of absorption.
- Jan Hidders