Hello,

I'm using glpk and I don't know how to write the condition below in my 
model:


? x[k,l] = p ?(i, j ) ? {1,..., I }× {1,..., J } as Obstacle[i,j] = 0
(k,l)?{1,...,I}×{1,..., J }
as ( k - i )² + ( l - j )² = d²


- The only variable of the problem is x[i,j] : x[i,j] ? {0,1} , i ? 
{1,..., I }, j ? {1,..., J } .
- I,J,d and Obstacle[i,j] are parameters of the problem

Please can you give me a solution to write this in my model.

Best Regards,

Mansour.






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