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Generalising diagonal strict concavity property for uniqueness of Nash equilibrium

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Abstract

In this paper, we extend the notion of diagonally strictly concave functions and use it to provide a sufficient condition for uniqueness of Nash equilibrium in some concave games. We then provide an alternative proof of the existence and uniqueness of Nash equilibrium for a network resource allocation game arising from the so-called Kelly mechanism by verifying the new sufficient condition. We then establish that the equilibrium resulting from the differential pricing in the Kelly mechanism is related to a normalised Nash equilibrium of a game with coupled strategy space.

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Correspondence to Eitan Altman.

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Eitan Altman and Rajesh Sundaresan were supported by IFCAM (Indo-French Centre for Applied Mathematics). Manjesh Kumar Hanawal was supported by the European Commission within the framework of the CONGAS project FP7-ICT-2011-8-317672.

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Altman, E., Hanawal, M.K. & Sundaresan, R. Generalising diagonal strict concavity property for uniqueness of Nash equilibrium. Indian J Pure Appl Math 47, 213–228 (2016). https://doi.org/10.1007/s13226-016-0185-4

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  • DOI: https://doi.org/10.1007/s13226-016-0185-4

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