ourmodelbyderivingthelikelihoodfPofanobservedsetofphotostreamsPBasedontheassumptionA1andA2thelikelihoodfPisdenedasfollowsfPLYl1fPlfPlfxl1tl1LlYi2fxlitlijxli1tli11wher ID: 151158
ourmodelbyderivingthelikelihoodf(P)ofanobservedsetofphotostreamsP.Basedontheassumption(A1)and(A2)