Dynamic Message Passing (DMP) Algorithm for Independent Cascade Model

When the recovery rate of the SIR model is 100%，the discrete SIR model will degenerate to Independent Cascade model which is the bases of information diffusion modeling. According to Inferring the origin of an epidemic with a dynamic message-passing algorithm, we can simplify their DMP and get the iterative formula for IC model.

For more details of DMP please refer to:

'Lokhov, Andrey Y. et al. “Inferring the origin of an epidemy with dynamic message-passing algorithm.” Physical review. E, Statistical, nonlinear, and soft matter physics 90 1 (2014): 012801 .'