Adding Constraint

回答済み

Musa Dursun

2020年12月20日 15:03

• 
• 
• 

How can I write code for this constraint ?

Xtk >= Xpk, all t and k, p is from t to last range.

I mean; for t in range 3

X11 >= X12

X11 >= X22

X11 >= X32

X21 >= X22

X21 >= X32

X31 >= X32

0

• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2025年06月23日 03:03 編集済み

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
• 

  Jaromił Najman

  • Gurobi Staff

  2020年12月21日 08:53 編集済み

  Hi Musa,

  This is not really a Gurobi related question but rather a Python question. Nevertheless, you can use one of the following codes to model your inequalities:

  T = [1,2,3]
  K = [1,2]
  X = m.addVars(T, K, vtype=GRB.BINARY, name="X")
  
  for t in T:
    for p in T:
      if p>=t:
        for k1 in K:
          for k2 in K:
            if k2>k1:
              m.addConstr(X[t,k1] >= X[p,k2], name="constrX[%g,%g,%g,%g]"%(t,k1,p,k2))

  You can also use the addConstrs function

  m.addConstrs((X[t,k1] >= X[p,k2] for t in T for p in T if p>=t for k1 in K for k2 in K if k2>k1), name="constrX")

  Best regards,
  Jaromił

  0

投稿コメントは受け付けていません。