Journal of Statistical Physics, Vol. 44, Nos. 5/6, 1986. p. 933-939.
This note contains a formalism for calculating properties of random walks in the presence of a set of partially absorbing traps. The properties that are considered are the probability of trapping at a specific point and the survival probability as a function of step number. The results are expressed in terms of determinants, but approximations to these can be found.