TWO COUNTING PROCESSES IN A MARKOV CHAIN WITH COUNTINUOUS TIME
 
                 
                
                    
                                        
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Graphical Abstract
 
                                        
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Abstract
    In this paper, we consider two transition numbers among all states and from state set A to B in a homogeneous Markov chain with continuous time during (0, t. In order to calculate their mean transition numbers, some simple useful formulas in stochastic models are obtained and a new class of infinite phase type distributions is introduced.
 
                                        
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