# Namkyoung Lee

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## Activity overview

Latest activity by Namkyoung Lee
• Namkyoung Lee commented,

Hi Jaromił, Thanks to you, I am able to realize only now the optimizing behavior of model. With regard to the formula issue, I am going to take another measures that implement LP relaxation, modeli...

• Namkyoung Lee commented,

Hi Jaromił, Many thanks for every moment. The module included in objective function, tmp_f() merely represents a simplified form of my real formula. When I consulted a month ago, you mentioned solv...

• Namkyoung Lee created a post,

### How to get the index value of binary variable using indicator constraint

Answered

This thread resumes Indicator constraint which contains constant value. I adopted indicator constraint previously you recommended and focused on programming which means that constant A equals const...

• Namkyoung Lee commented,

Hi Jaromil, You demonstration is very informative as always. I adopted indicator constraint that previously you recommended and focused on programming which means that constant A equals constant B,...

• Namkyoung Lee created a post,

### Indicator constraint which contains constant value

Answered

This is connected posting of recent question.There is an objective function including a formula which is actually so complicated to convert into gurobi library type or slack using. And the input of...

• Namkyoung Lee commented,

Hi Jaromił, I appreciate your continuance of help.This is another sample code, which contains an error about indicator constraint.I pursue constructing formulation with input whether variables have...

• Namkyoung Lee commented,

Hi Jaromił, Your comments were really helpful to understand Gurobi's solving flow. Many thanks. When it comes to the quadratic expression, my problem is actually nonlinear (not quadratic), which re...

• Namkyoung Lee commented,

Firstly, I apologize insufficient previous inquiry. The point is value extraction of variables before optimization, which cannot be captured with X attribute and it's hard to search update method c...

• Namkyoung Lee created a post,

### How can I get values of variables awaiting model update in Gurobi python

Answered

I develop a quadratic programming model using Gurobi python API. In terms of objective formulation containing a function associated with decision variable, such as obj = f(x) + g(y), I need to get ...