[AMPL 2609] How to handle the "max" and "abs" functions applied to variables in an objective or constraint

[Chano-3]

Hi,

I need to know how to handle the max and abs functions applied to
variables in an objectives or constraint. I don´t have the AMPL Book
and in the web it doesn´t appear, so I have not read anything about
it. There is someone who can help me. This is a big bottle neck of my
investigation.


minimize FO {k in i}: max (Y[k]+H[k]/2) ;


subject to traslape {k in i, p in i}:
                         max ( abs(X[k]-X[p]) - W[k]/2 - W[p]/2, abs(Y[k]-Y[p]) - H[k]/2 - H
[p]/2 ) >= 0;

Thanks

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