Derek Long

  • Gurobi-versary
  • First Comment
  • First Question
  • Total activity 8
  • Last activity
  • Member since
  • Following 0 users
  • Followed by 0 users
  • Votes 0
  • Subscriptions 2

Activity overview

Latest activity by Derek Long

  • Derek Long commented,

    Thanks Jaromił. Please find the updated .mps file here (I've checked that the incumbent solution has the same objective as before).  Kind regards,Derek

    View comment Derek Long 0 votes

  • Derek Long commented,

    Hi Jaromił, Thanks for your response. Currently, the objective looks like the following (where `self.distances`, `self.teams`, and `self.timesteps` are arrays of constants, and `self.l` are the Loc...

    View comment Derek Long 0 votes

  • Derek Long created a post,

    Solving a very Large QIP

    Answered

    Dear Gurobi Team, Hope you are well. I am trying to solve a large QIP and have been running it for quite some time without much improvement in the optimality gap. Would you be able to take a look a...

    Derek Long 2 followers 5 comments 0 votes

  • Derek Long commented,

    Great, were you able to find a feasible solution to those models within that time? Kind regards, Derek

    View comment Derek Long 0 votes

  • Derek Long commented,

    Hi Jaromił, Thanks for your response. Here's the model with t=1,...,100 and the model with t=1,...,177 (which is the actual problem I am aiming to solve but cannot currently optimize due to insuffi...

    View comment Derek Long Edited 0 votes

  • Derek Long created a post,

    Numerical Issues with Large QIP

    Answered

    Hey Gurobi Team, I'm trying to solve a fairly large quadratic integer program (lots of binary variables) but it's getting stuck at Root simplex log... Here is the code: import numpy as npimport pan...

    Derek Long Edited 2 followers 5 comments 0 votes