Help: sets in Lingo 8

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Abed

Posted: Tue Dec 05, 2006 10:08 am

Guest

Hi!, in an AoN network (activity on node), we have a set of activities,

SA={1,..,n}, and a set named P={1,..,Pn}, in which Pi denotes the set
of predecessor activities of activity i, i=(1,..,n), note that Pi is a
subset of SA. how can I define a set (in Lingo) which it's members are
sets? can anyone help me?
remember that i don't want sets like this:
sets:
TASK /1,..,n/ ;
Pred(task,task) ;
endsets

thank you,

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