Bradley Ning
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Latest activity by Bradley Ning-
Bradley Ning commented,
Dear Eli, thanks for your kind help and very detailed response, it is work if u is defined variable. While in my original problem, the 'u' in my code actually is a combination of other variables, f...
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Bradley Ning created a post,
A weird output, is it a bug of Gurobi 8.1.1?
AnsweredHi there, I am runing the following simple python code, the m.ObjVal output is 4.0, v.X is 0.01, while obviously, the minimum should be 0 if u is between 1/3 to 2/3? My Gurobi version is 8.1.1, an...
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Bradley Ning commented,
Hi Eli, I understand how to get the value of a variable, while what I want is add constraint to T[i][j], T[i][j] are binary variables, and T[i][j] = T[i][j] or ( T[i][k] and T[k][j] ) with i, j, k ...
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Bradley Ning commented,
My logic experssion and operation is: T[i][j] = T[i][j] or ( T[i][k] and T[k][j] ) with i, j, k in T.keys() loops T[i][j] are binary variables, it looks like Guroby does not support such logic oper...
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Bradley Ning commented,
Hi Sonja: Thanks for your reply, I have copied a screen shot here. From the screen shot, we can find that: print(ttt['A']['A'], x_ij['B']['C']) the output is: <gurobi.Var T_A_A (value 0.0)> <gurobi...
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Bradley Ning created a post,
Very weird output of binary variable?
AnsweredAfter optimizing successfully, when I transfer the binary variables as input parameters to a logic function (‘and’, ‘or’ operation etc.), the output is different from when I transfer the values of ...