Abstract
This paper proposes a novel formulation using the matrix cone programming to compute an upper bound of the Shannon capacity of graphs, which is theoretically superior to the Lovász number. To achieve this, a sequence of matrix cones is constructed by adding certain co-positive matrices to the positive semi-definite matrix cones during the matrix cone programming. We require the sequence of matrix cones to have the weak product property so that the improved result of the matrix cone programming remains an upper bound of the Shannon capacity. Our result shows that the existence of a sequence of suitable matrix cones with the weak product property is equivalent to the existence of a co-positive matrix with testable conditions. Finally, we give some concrete examples with special structures to verify the existence of the matrix cone sequence.
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Acknowledgements
The authors would like to thank Prof. Si-Huang Hu, Prof. De-Feng Sun and Prof. Hao Wu for their valuable discussions and helpful advice on optimization and information theory.
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Shi-Tong Wu and Zhen-Nan Zhou developed the presented idea of the matrix cone programming to investigate the Shannon Capacity. Shi-Tong Wu drafted the article, Zhen-Nan Zhou, Zhong-Yi Huang and Bo Bai reviewed and co-supervised this work. Zhen-Nan Zhou and Zhong-Yi Huang verified the theoretical result and examples and supervised the findings of this work. Bo Bai provided useful suggestions on the information theory and the application of the Shannon Capacity from industrial perspective. All the authors discussed the results and contributed to the final manuscript.
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The authors declare that there is no conflict of interests regarding the publication of this paper.
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This work was supported by the National Natural Science Foundation of China (Nos. 11871297, 11871298, 12025104 and 12031013) and the Tsinghua University Initiative Scientific Research Program. Zhen-Nan Zhou was also partially supported by the National Key R &D Program of China (No. 2020YFA0712000).
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Wu, ST., Zhou, ZN., Huang, ZY. et al. Approximation of the Shannon Capacity Via Matrix Cone Programming. J. Oper. Res. Soc. China 11, 875–889 (2023). https://doi.org/10.1007/s40305-022-00408-6
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DOI: https://doi.org/10.1007/s40305-022-00408-6