Questions tagged [c#]
The c# tag has no usage guidance.
10
questions
6
votes
1answer
407 views
Is there any open source quadratic programming solver with C# API
I have a quadratic programming model (i.e., quadratic objective function and linear constraint) and, I want to solve it on an open-source solver. Since our project developed on C#, we also would like ...
0
votes
0answers
23 views
Add bunch of constraints using IRange and add to Model in Cplex C#
I am new in C#-CPLEX. In public samples, the constraints are added one by one as follows:
...
2
votes
0answers
72 views
Building model takes so much time in Cplex
I am a beginner in CPLEX. I have a model with about 1 million constants and 800k rows and 1.6 million columns. I implemented in both GAMS and CPLEX (C# as the platform). The final solution for both is ...
2
votes
1answer
119 views
Using OR-Tools with .NET and GUROBI
We want to model our MILP problem with Google OR-Tools in .NET, and solve it using GUROBI (solver may change in the next 1-2 years). However, we couldn't find the correct syntax to call GUROBI.
https:/...
1
vote
1answer
52 views
How to call Cplex.AddMIPStart method
Could you please tell where I can find a method Cplex.AddMIPStart? By that I mean in which library and how to link this library to my C# project.
1
vote
1answer
97 views
CP-SAT _ Summing variables under conditions
I have been working lately on scheduling optimization using CP-SAT in OR-TOOLS and now I'm at the point where I need to start considering due dates in my model.
I didn't want to put them as ...
3
votes
2answers
146 views
Google OR returning different values depending on language
Lately, I have been working on a CP-SAT model for solving multi-resource flexible job shop problems.
I used the code (1) as an inspiration for building code (2) in Python which works well. Then I had ...
1
vote
1answer
170 views
Flexible Job Shop Problem with several resources per alternative - Ortools
It has been quite a journey for me to go from 0 to understanding the job shop (js) and the flexible job shop (fjs) examples given by Google's ORTOOLS team.
Now the time has come for me to start ...
0
votes
1answer
99 views
How can I use warm start in C#
I have been working on an MIP in C#. I want to reduce the gap, so I'm trying warm start. I use this code just before solve().
...
3
votes
1answer
154 views
Optimal way to ensure optional intervals are consecutive in OR-Tools
I am trying to solve a scheduling problem in OR-Tools. There are lots of "events" that need to be scheduled to "blocks" (essentially half-days). I am naturally using optional intervals for the events. ...
