## Double Summation question ( how to open this? )

Minimise ∑ ∑ ∑ ( ( ∑ Cp * ( Wi,p,t * Gi,p,k + Yi,q,t * Gi,q,t ) +
t∈T p∈P k∈K i∈Ip

∑ ( Dq ( Wi,p,t * Hi,p,m + Yi,q,t * Hi,q,t ) * Zm) ))
m∈M

this is a Nonlinear mixed integer programming model , i need to open this objective function, i can do p=1 and k=1, so i think that its a double summation, this function have to set of objective
function and constraints constitutes thats a mixed integer nonlinear
programming model .