2016

A Second-Order Cone Based Approach for Solving the Trust Region Subproblem and Its Variants

Ho-Nguyen, Nam, Kilinc-Karzan, Fatma

Understand

We study the trust-region subproblem (TRS) of minimizing a nonconvex quadratic function over the unit ball with additional conic constraints.

  • Despite having a nonconvex objective, it is known that the classical TRS and a number of its variants are polynomial-time solvable.
  • In this paper, we follow a second-order cone (SOC) based approach to derive an exact convex reformulation of the TRS under a structural condition on the conic constraint.
  • Our structural condition is immediately satisfied when there is no additional conic constraints, and it generalizes several such conditions studied in the literature.

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