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IBM Data and AI Ideas Portal for Customers

This portal is to open public enhancement requests against products and services offered by the IBM Data & AI organization. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (

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Status Future consideration
Created by Guest
Created on May 25, 2020

Implement nonconvex quadratic constraints in CPLEX

CPLEX already supports nonconvex quadratic objectives, but not yet constraints, even though they bring a lot of flexibility in modelling.

Needed by Date May 25, 2021
  • Guest
    Jul 16, 2024

    We are solving mixed-integer quadratically-constrained quadratic programming problems (MIQCQP). We are happy with the CPLEX functionality (we have the version 22.1.1) as long as our quadratic constraints are convex. However, we are working on implementation of new functionality in our product where the quadratic constraints are inherently nonconvex. At the moment, we are using a workaround but it might not be too reliable. We would really appreciate if you could implement nonconvex quadratic constraints in CPLEX.

    Thank you very much,

    Alexander Kuznetsov

    Tindeco Financial Services Ltd.