Inproceedings,

Size Fair and Homologous Tree Genetic Programming Crossovers

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Proceedings of the Genetic and Evolutionary Computation Conference, 2, page 1092--1097. Orlando, Florida, USA, Morgan Kaufmann, (13-17 July 1999)

Abstract

Size fair and homologous crossover genetic operators for tree based genetic programming are described and tested. Both produce considerably reduced increases in program size and no detrimental effect on GP performance. GP search spaces are partitioned by the ridge in the number of program versus their size and depth. A ramped uniform random initialisation is described which straddles the ridge. With subtree crossover trees increase about one level per generation leading to sub-quadratic bloat in length.

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