Originally posted by: Aaronlidebiao

Hi,

I tried to do a optimization by minimizing the sum of the chebyshev distance. The chebyshev distance is the maximal absolute value of the two points' x and y coordinates.

Assume the x[i] and y[i] are the variables, How to express the min-max.

If I express as follow, there is a error message in Cplex.

minimize

max(x[i],y[i])

Thanks.

Regards,

Aaron

Originally posted by: Petr Vilím

Hello,

If I understand correctly, try to use maxl instead of max. The keyword max is reserved for a maximum over a set:

max (i in 1..10) x[i]

while maxl gives maximum from a fixed list of parameters:

maxl(x[1], y[1])

Best, Petr

Originally posted by: Aaronlidebiao

Thank you very much. Petr.

Regards,

Aaron