Abstract
Representations of solutions of boundary value problems for simple domains in the Monte Carlo algorithms are widely distributed [2]. In particular, widespread use is made of such a representation for the ball. It allows one to formally write an integral equation of the second kind for the required function in an arbitrary domain with regular boundary. Moreover, with the involvement of the joining conditions [1], one can picture a possible construction of a random process to “solve” the problem. However, the “walk in spheres” process, which solves the first boundary value problem for the Poisson equation, results in ɛ-biased estimators, and so the introduction of a regularization parameter is required.
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