I'm trying to model a linear programming task with the condition 4 people going to the same place among 3 different places for at least 5 days. I have the variables for the time spend each person in each city and the binary variables telling if each person goes to each citie.
My approach was sometihng related to multiplying the binary variables, but then i reallized that if we have variable multiplications we would not be talking about a linear task.
Any ideas?