# American Institute of Mathematical Sciences

October  2019, 15(4): 1795-1807. doi: 10.3934/jimo.2018123

## Homotopy method for solving generalized Nash equilibrium problem with equality and inequality constraints

 School of Science, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China

* Corresponding author: Xiaona Fan

Received  July 2017 Revised  May 2018 Published  August 2018

In this paper, we utilize a new homotopy method to solve generalized Nash equilibrium problem with equality and inequality constraints on unbounded sets. Based on the existing homotopy method, we establish a new homotopy equation by introducing a suitable perturbation on the equality constraint, the existence and the global convergence of homotopy path under certain assumptions have also been proved. In the proposed method, the initial point only needs to satisfy the inequality constraints. Compared with the existing homotopy method, this method expands the scope of the initial points and provides the convenience for solving generalized Nash equilibrium problem. The numerical results illustrate the effectiveness of this method.

Citation: Xiaona Fan, Li Jiang, Mengsi Li. Homotopy method for solving generalized Nash equilibrium problem with equality and inequality constraints. Journal of Industrial & Management Optimization, 2019, 15 (4) : 1795-1807. doi: 10.3934/jimo.2018123
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##### References:
The numerical results of Example 3.1
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.8, 0.2, 0.5, 0.5)^T$ A1 0.049842 19 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $5.6755\times 10^{-7}$ A2 0.068653 23 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $4.8879\times 10^{-7}$ $(0.6, 0.4, 0.5, 0.5)^T$ A1 0.032000 11 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $1.2632\times 10^{-7}$ A2 0.047000 12 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $8.5698\times 10^{-7}$ $(0.3, 0.4, 0.6, 0.5)^T$ A1 0.015000 12 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $1.3661\times 10^{-7}$ $(0.3, 0.4, 0.5, 0.4)^T$ A1 0.016000 12 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $5.6057\times 10^{-7}$
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.8, 0.2, 0.5, 0.5)^T$ A1 0.049842 19 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $5.6755\times 10^{-7}$ A2 0.068653 23 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $4.8879\times 10^{-7}$ $(0.6, 0.4, 0.5, 0.5)^T$ A1 0.032000 11 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $1.2632\times 10^{-7}$ A2 0.047000 12 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $8.5698\times 10^{-7}$ $(0.3, 0.4, 0.6, 0.5)^T$ A1 0.015000 12 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $1.3661\times 10^{-7}$ $(0.3, 0.4, 0.5, 0.4)^T$ A1 0.016000 12 $(0.5000, 0.5000, 0.7743, 0.2257)^T$ $5.6057\times 10^{-7}$
The numerical results of Example 3.2
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.7, 0.3, 0.3, 0.7)^T$ A1 0.017811 20 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $5.5142\times 10^{-7}$ A2 0.052286 23 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $1.2044\times 10^{-7}$ $(0.7, 0.3, 0.5, 0.5)^T$ A1 0.016000 11 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $1.7536\times 10^{-7}$ A2 0.032000 11 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $5.0169\times 10^{-7}$ $(0.6, 0.3, 0.6, 0.5)^T$ A1 0.016000 10 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $2.0758\times 10^{-7}$ $(0.6, 0.5, 0.6, 0.5)^T$ A1 0.015000 9 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $8.4904\times 10^{-7}$
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.7, 0.3, 0.3, 0.7)^T$ A1 0.017811 20 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $5.5142\times 10^{-7}$ A2 0.052286 23 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $1.2044\times 10^{-7}$ $(0.7, 0.3, 0.5, 0.5)^T$ A1 0.016000 11 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $1.7536\times 10^{-7}$ A2 0.032000 11 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $5.0169\times 10^{-7}$ $(0.6, 0.3, 0.6, 0.5)^T$ A1 0.016000 10 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $2.0758\times 10^{-7}$ $(0.6, 0.5, 0.6, 0.5)^T$ A1 0.015000 9 $(0.5000, 0.5000, 0.7500, 0.2500)^T$ $8.4904\times 10^{-7}$
The numerical results of Example 3.3
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.8, 0.2, 0.2, 0.8)^T$ A1 0.060919 27 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $2.9945\times 10^{-7}$ A2 0.102540 102 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $9.3449\times 10^{-7}$ $(0.9, 0.1, 0.1, 0.9)^T$ A1 0.036579 33 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $4.5683\times 10^{-7}$ A2 0.097798 128 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $9.6001\times 10^{-7}$ $(0.3, 0.8, 0.4, 0.5)^T$ A1 0.050146 18 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $8.8414\times 10^{-7}$ $(0.2, 0.6, 0.3, 0.4)^T$ A1 0.032000 22 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $1.6179\times 10^{-7}$
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.8, 0.2, 0.2, 0.8)^T$ A1 0.060919 27 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $2.9945\times 10^{-7}$ A2 0.102540 102 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $9.3449\times 10^{-7}$ $(0.9, 0.1, 0.1, 0.9)^T$ A1 0.036579 33 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $4.5683\times 10^{-7}$ A2 0.097798 128 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $9.6001\times 10^{-7}$ $(0.3, 0.8, 0.4, 0.5)^T$ A1 0.050146 18 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $8.8414\times 10^{-7}$ $(0.2, 0.6, 0.3, 0.4)^T$ A1 0.032000 22 $(0.2165, 0.7835, 0.4331, 0.5669)^T$ $1.6179\times 10^{-7}$
The numerical results of Example 3.4
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.8, 0.2, 0.2, 0.8)^T$ A1 0.090294 34 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $9.9066\times 10^{-7}$ A2 0.170305 79 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $8.9245\times 10^{-7}$ $(0.7, 0.3, 0.3, 0.7)^T$ A1 0.074322 31 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $9.4454\times 10^{-7}$ A2 0.096164 64 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $6.9529\times 10^{-7}$ $(0.3, 0.8, 0.4, 0.7)^T$ A1 0.071024 32 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $7.7431\times 10^{-7}$ $(0.4, 0.5, 0.4, 0.5)^T$ A1 0.031000 17 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $1.3352\times 10^{-7}$
 $x_0$ method CPU IT $x^*$ $\mu^*$ $(0.8, 0.2, 0.2, 0.8)^T$ A1 0.090294 34 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $9.9066\times 10^{-7}$ A2 0.170305 79 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $8.9245\times 10^{-7}$ $(0.7, 0.3, 0.3, 0.7)^T$ A1 0.074322 31 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $9.4454\times 10^{-7}$ A2 0.096164 64 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $6.9529\times 10^{-7}$ $(0.3, 0.8, 0.4, 0.7)^T$ A1 0.071024 32 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $7.7431\times 10^{-7}$ $(0.4, 0.5, 0.4, 0.5)^T$ A1 0.031000 17 $(0.4420, 0.5580, 0.6384, 0.3616)^T$ $1.3352\times 10^{-7}$
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