Non-negative variables and -0.0 values

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Ayesha Farooq

2023年11月08日 20:59

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I am trying to solve a goal programming problem. My deviation variables' (n_l, p_l) values are supposed to be non-negative integers. I even added constraints like

    for l in L:
        m.addConstr(nl[l]>= 0)
        m.addConstr(pl[l]>= 0)

but I still get -0.0 for some of the variable values while 0.0 for others. 

I can see 0.0 is valid but what does -0.0 mean and why the added constraints do not take care of it?

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  Simranjit Kaur

  • Gurobi Staff

  2026年11月13日 01:35

  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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  Marika Karbstein

  • Gurobi Staff

  2023年11月09日 10:49

  Please see this post.

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