Mario Ruthmair
- 合計アクティビティ 8
- 前回のアクティビティ
- メンバー登録日
- フォロー 0ユーザー
- フォロワー 0ユーザー
- 投票 0
- サブスクリプション 2
アクティビティの概要
Mario Ruthmairさんの最近のアクティビティ-
Mario Ruthmairさんがコメントを作成しました:
Hi Eli, Your callback should be written to generate lazy constraints to cut off MIPSOL solutions that violate your capacity constraints, even if you have previously added the same lazy constraints...
-
Mario Ruthmairさんがコメントを作成しました:
Hi Eli, this is indeed a very interesting point! The problem I want to solve is a capacitated routing problem. Capacity cuts (the cut you are mentioning above is one of them) are used both as lazy ...
-
Mario Ruthmairさんがコメントを作成しました:
Hi Jaromił, if I add all lazy constraints a priori to the model with lazy attribute 1, then all lazy constraints are correctly satisfied and the solution is different (I added the LP file including...
-
Mario Ruthmairさんが投稿を作成しました:
Ignored lazy constraint leads to wrong solution
進行中Hi, I am working on a branch-and-cut algorithm in C++ using both lazy constraints and user cuts. For one particular model, an incumbent solution is accepted although a violated lazy constraint is a...
-
Mario Ruthmairさんがコメントを作成しました:
The answer to question 4 is in fact easy: It is the total number of callback calls, including POLLING, PRESOLVE, MIPSOL, MIPNODE, etc., not only the user-cut callbacks. Best regards, Mario
-
Mario Ruthmairさんが投稿を作成しました:
same LP solution multiple times in root node, user cuts ignored
Dear support team, I am working on a branch-and-cut algorithm using the C++ interface of Gurobi to add user cuts via callbacks. While I know that Gurobi heuristically decides which user cuts to acc...