Efficient algorithms for checking avoiding sure loss

Nakharutai, Nawapon; Troffaes, Matthias C.M.; Caiado, Camila C.C.S.

Abstract

Sets of desirable gambles provide a general representation of uncertainty which can handle partial information in a more robust way than precise probabilities. Here we study the effectiveness of linear programming algorithms for determining whether or not a given set of desirable gambles avoids sure loss (i.e. is consistent). We also suggest improvements to these algorithms specifically for checking avoiding sure loss. By exploiting the structure of the problem, (i) we slightly reduce its dimension, (ii) we propose an extra stopping criterion based on its degenerate structure, and (iii) we show that one can directly calculate feasible starting points in various cases, therefore reducing the effort required in the presolve phase of some of these algorithms. To assess our results, we compare the impact of these improvements on the simplex method and two interior point methods (affine scaling and primal-dual) on randomly generated sets of desirable gambles that either avoid or do not avoid sure loss. We find that the simplex method is outperformed by the primal-dual and affine scaling methods, except for very small problems. We also find that using our starting feasible point and extra stopping criterion considerably improves the performance of the primal-dual and affine scaling methods.

Citation

Nakharutai, N., Troffaes, M. C., & Caiado, C. C. (2017, July). Efficient algorithms for checking avoiding sure loss. Presented at The Tenth International Symposium on Imprecise Probability: Theories and Applications (ISIPTA ’17), Lugano, Switzerland

• Presentation Conference Type: Conference Paper (published)
• Conference Name: The Tenth International Symposium on Imprecise Probability: Theories and Applications (ISIPTA ’17)
• Start Date: Jul 10, 2017
• End Date: Jul 14, 2017
• Acceptance Date: Apr 17, 2017
• Online Publication Date: Jun 20, 2017
• Publication Date: Jun 20, 2017
• Deposit Date: Feb 17, 2017
• Publicly Available Date: May 15, 2017
• Publisher: PMLR
• Pages: 241-252
• Series Title: Proceedings of Machine Learning Research
• Series Number: 62
• Series ISSN: 1938-7228
• Book Title: Proceedings of the Tenth International Symposium on Imprecise Probability : Theories and Applications, 10-14 July 2017, Lugano (Switzerland).
• Public URL: https://durham-repository.worktribe.com/output/1147581
• Publisher URL: http://proceedings.mlr.press/v62/nakharutai17a.html