Elisabeth Rodríguez Heck

Gurobi Staff Gurobi Staff
  • Total activity 138
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Activity overview

Latest activity by Elisabeth Rodríguez Heck

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Other
    3. Column generation basics webinar

    Hi, You will receive an e-mail to the address with which you registered for the webinar. This can take a week or a bit more. In case you miss the e-mail, you can keep an eye on our events website h...

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    • Elisabeth Rodríguez Heck
    • 1 vote

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Algorithms
    3. Does more threads mean quicker?

    Hi Peilin, Good to read that the NoRel Heuristic helps improving the best incumbent so much. Some other things that may help: The MIP start that you are providing leaves many binary variables unas...

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Algorithms
    3. Does more threads mean quicker?

    Thanks for your advices. Since my problem is NP-hard, It is very hard to solve. So I have to spend all the time finding a better solution. Have you tried other parameters not focusing on heuristi...

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Algorithms
    3. Does more threads mean quicker?

    Hi, If you want Gurobi to only spend time finding a good solution in 500s, you can set NoRelHeurTime=500 and TimeLimit=500. This will make Gurobi apply the NoRel Heuristic for the whole time limit ...

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Algorithms
    3. Solution Method and Runtime

    Hi Regina, Yes, the method used here is Branch-and-Cut. Best regards, Elisabeth

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Systems
    3. Licence type

    Sorry, I realize now that you said one server with multiple users. I thought you meant a cluster with multiple machines, in which case Educational Institution Site licenses are the most suitable op...

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Systems
    3. Licence type

    Hi Sofia, It sounds like you are looking for an Educational Institution Site License. Quoting the article: Gurobi also offers a multi-user Educational Institution Site license that provides a centr...

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Algorithms
    3. Solution Method and Runtime

    Hi Regina, I understand your confusion, this was not completely clear in the Gurobot reply. Branch-and-cut is essentially branch-and-bound with the addition of using Cutting Planes to tighten the L...

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    • Elisabeth Rodríguez Heck
    • 0 votes

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Algorithms
    3. Integer Solutions of Linear Programming Problems

    Hi Sudheer, This is a very interesting topic.  A powerful property related to this is Total Unimodularity. See for example the resources: https://theory.stanford.edu/~jvondrak/MATH233B-2017/lec3.p...

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    • Elisabeth Rodríguez Heck
    • 1 vote

  • Elisabeth Rodríguez Heck commented,

    1. Community
    2. Systems
    3. Gurobi License verification Error

    Hi Kalyan, I already created a ticket for you (#67475), you should have received an e-mail, or be able to see it in the Gurobi Help Center under "Requests". This error means that you are trying to ...

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    • Elisabeth Rodríguez Heck
    • 0 votes