Polynomial-delay generation of functional digraphs up to isomorphism

02/27/2023
by   Antonio E. Porreca, et al.
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We describe a procedure for the generation of functional digraphs up to isomorphism; these are digraphs with uniform outdegree 1, also called mapping patterns, finite endofunctions, or finite discrete-time dynamical systems. This procedure is based on an algorithm for the generation of connected functional digraphs, which is then generalised to arbitrary ones. Both algorithms have an O(n^3) delay between consecutive outputs. We also provide a proof-of-concept implementation of the algorithms.

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