how to write a square constraint？

Answered

w sj

August 05, 2023 16:10

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Hello，when i using python API to establish a model，i can't write the constraint  in gurobi 8.1.

5*（x1^2+x2^2）^0.5<30 

Thank you very much for your answer

Related to

• Bilinear

1

• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 13, 2026 01:39

  This post is more than two 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 try Gurobot, our chatbot interface offering instant, expert-level support.
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  Riley Clement

  • Gurobi Staff

  August 06, 2023 02:06

  Hi,

  You can divide both sides of the inequality by 5, then square each side to get an equivalent form.  You can then use

  m.addConstr(x1*x1 + x2*x2 <= 36)

  - Riley

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  w sj

  August 06, 2023 03:00

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  Thanks.This inequality is just a small example I gave to illustrate the problem, and it may not be very appropriate. I successfully wrote this constraint by introducing auxiliary variables .

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