ocr: Recombination Methods Genetic programming applies recombination methods. to population expressions in tree form. in this form, GPS uses the CROSSOVER method tor replace a subtree of (A) with a subtree of (B). For example, replacing the shaded subtree in (A) with the shaded subtree in (B) gives the expres- sion silver(t) + gold(t-2). GPS. uses the MUTATION method to replace the subtree in (A) with a newly generated subtree (like primerate(t-3) resuiting in primerated-3)-golde-2), GPS uses RERANDOM- IZATION to replace some of the numbers in an expression with new numbers, so that (B) becomes sil ...
