Hongyu Zhang
- 合計アクティビティ 11
- 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 4
投稿
Hongyu Zhangによる最近のアクティビティ-
Getting "DUAL_INFEASIBLE" when solving a very simple linear programming problem.
回答済みHello! I am solving a simple LP problem with dual simplex and presolve. I get the model is unbounded but I couldn't see why such a model is unbounded, can it relates to numerical issues? Please hel...
-
Why Barrier report numerical trouble encountered even the ranges are not large?
進行中Hello! I am using Barrier with persovle on to solve an LP. So I rescaled the model to make the matrix and objective range relatively small. And this model is solved with dual simplex without an iss...
-
How Gurobi solves a optimisation problem that doesn't have an objective?
回答済みHello! I am solving an LP optimisation problem and wondering how Gurobi solves a problem without an objective? For example, an LP problem with some inequality constraints and some equality constra...
-
Retrieve constraints matrix from Gurobi or MOI or JuMP in Julia
回答済みHello! I want to retrieve an LP model in matrix form from Gurobi. I am using package JuMP in Julia. I can print all the constraints using MathOptInterface but not in matrix form. I have no idea h...