ON A CHARACTERIZATION OF THE MULTIVARIATE LIFE DISTRIBUTIONS SNBU AND ITS CLOSURE PROPERTY
 
                 
                
                    
                                        
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Graphical Abstract
 
                                        
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Abstract
    In this paper, some properties of the multivariate life distributions SNBU are discussed. A necessary and sufficient condition for the non-negative random vector T to be SNBU distribution is given. A definition of G-mapping is introducced. Some dosure properties of the SNBU distribution are derived.
 
                                        
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