Subject: Re: your mail

> 
> HI: DR. Collberg:
> 
> I do the Homework II on "Slide 1-49". However, I can not get the correct way to
> figure out the _est relationship.
> 
> for example:
>     youngestsibling(X,Y,G)
> should we get the full set of Y's siblings and then compare all pairs of them.
> How to get the full set of Y's siblings is also a problem.
> 
> This _est relation is very important. Could you please give me some clues?
> 
> Thanks for your time.
> 

Pick a sibling such that there does not exist a younger one.
I.e. you need to use negation.

/CC

___________________________________________________________________________
Christian Collberg      | Email: c_collberg@cs.auckland.ac.nz
Computer Science Dept   | Fax:   +64-9-373-7453
University of Auckland  | Phone: +64-9-373-7599 x 6137
Private Bag 92019,      | WWW:   http://www.cs.auckland.ac.nz/~collberg/
Auckland, NZ            |
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"Education is an admirable thing, but it is well to remember from time
to time that nothing that is worth knowing can be taught." - Oscar Wilde
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