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Ali Mohammadian Mosammam

Kent J. T. & Mohammadzadeh, M. & Mosammam, A. M.
The dimple in Gneiting's spatial-temporal covariance model  

Gneiting (2002) proposed a nonseparable covariance model for spatial-temporal data. In the present paper we show that in certain circumstances his model possesses a counterintuitive dimple. In some cases, the magnitude of the dimple can be nontrivial.



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