Inst. f. Informatik   
Uni Leipzig

Bioinformatics Preprint 06-015



Christoph Flamm, Bärbel M. R. Stadler, Peter F. Stadler

Artificial Life, Special Issue on Artifical Chemistry 2006

Barrier trees are a convenient way of representing the structure of complex combinatorial landscapes over graphs. Here we generalize the concept of barrier trees to landscapes defined over general multi-parent search operators based on a suitable notion of topological connectedness that depends explicitly on the search operator. We show that in the case of recombination spaces, path-connectedness coincides with connectedness as defined by the mutation operator alone. In contrast, topological connectedness is more general and depends on the details of the recombination operators as well. Barrier trees can be meaningfully defined for both concepts of connectedness.
Keywords: Recombination, Genetic Algorithm, Fitness Landscape, Barrier Tree, Generalized Topology, Connectedness, Path Connectedness

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