What is the Kappa attribute?

Answered

Bo Yang

April 28, 2021 05:33

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Dear Sir/Madam,

I'm trying to measure the ill-conditioning of my LP. The manual says the Kappa value could reflect whether the LP is ill-conditioned. But I'm not sure how you define the Kappa. Is it as same as the condition number of the matrix? That is, the ratio of the largest to the smallest singular values?

Thank you for your help. 

Best,

Bo

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 02:56 Edited

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
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  Jaromił Najman

  • Gurobi Staff

  April 28, 2021 08:12

  Hi Bo,

  Please have a look at our documentation on the Kappa value. Please also note that the Kappa attribute is only the estimated value of Kappa while the KappaExact attribute provides the exact condition number. However, computing the exact Kappa is computationally more expensive.

  Best regards,
  Jaromił

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