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Bhattacharyya matrices and cubic exponential families |
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| Authors: | A Hassairi M Zarai |
| Institution: | Faculté des Sciences de Sfax, B.P.802, SFAX, Tunisie |
| Abstract: | This paper introduces a notion of semi-diagonality for a Bhattacharyya matrix to give a characterization of the Letac–Mora class of real natural exponential families having cubic variance function. |
| Keywords: | Semi-diagonality Bhattacharyya matrix Exponential family Variance function |
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