Let T 1 ,T 2 ,...,T n be independent survival times with hazard rate αi(t) for T i , and introduce the counting processes   a) Let  be known hazard functions (e.g., corresponding to the mortality in...

Let T₁,T₂,...,T_n
be independent survival times with hazard rate αi(t) for T_i, and introduce the counting processes

a) Let
 be known hazard functions (e.g., corresponding to the mortality in the general population). Find the intensity process of the aggregated process