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From: Steffen Mazanek <steffen.mazanek_at_unibw.de>

Date: Mon, 11 Feb 2008 05:03:00 -0500

2008/2/8, Michael Hanus <mh_at_informatik.uni-kiel.de>:

*>
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*> Sorry for the insufficient explanation, but PAKCS does not
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*> provide any specific implementation for FD constraints
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*> but just reuses the implementation which is available
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*> in SICStus Prolog. So, look at the documention at
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*>
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*> http://www.sics.se/sicstus/docs/latest3/html/sicstus.html/Enumeration-Predicates.html
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*>
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*> for more details. As far as I understand, it is not possible
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*> to minimize and maximize several variables at the same time
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*> since the labeling function commits to one solution if
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*> maximize/minimize is used. A solution to your problem is
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*> to define a single variable that represents the overall cost
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*> which should be maximized. For instance, you can define
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*> c=y-x-z and maximize c:
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*>
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*> CLPFD> domain [x,y,z] 0 100 & c =# y -# x -# z & labeling [Maximize c] [x,y,z]
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*> Free variables in goal: x, y, z, c
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*>
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*> Result: success
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*> Bindings:
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*> x=0
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*>
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*> y=100
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*> z=0
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*> c=100 ? ;
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*> No more solutions.
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*>
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*> I hope that helps.
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Thank you for your help with that. I have tried your example and it

works as expected. With my more complex constraints unfortunately

I get no solution. I try to break this down to give a simple example.

Thanks again,

Steffen

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Received on Mon Feb 11 2008 - 12:03:15 CET

Date: Mon, 11 Feb 2008 05:03:00 -0500

2008/2/8, Michael Hanus <mh_at_informatik.uni-kiel.de>:

Thank you for your help with that. I have tried your example and it

works as expected. With my more complex constraints unfortunately

I get no solution. I try to break this down to give a simple example.

Thanks again,

Steffen

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curry_at_lists.RWTH-Aachen.DE

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Received on Mon Feb 11 2008 - 12:03:15 CET

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