Using the method of images, exact solutions are given for various random walk models involving two interacting walkers on a finite one dimensional lattice. We extend the method of images to treat nonsymmetric walks with both reflecting and absorbing boundaries. One application of the models treated is the reversible unraveling (with a final irreversible step) of helical macromolecules.
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Schwarz et al. (1975) studied this question.
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