GeneticProgrammingTheoryandPracticeIVwasdevelopedfromthefourthworkshopattheUniversityofMichigan’sCenterfortheStudyofComplexSystemstofacilitatetheexchangeofideasandinformationrelatedtotherapidlyadvancingfieldofGeneticProgramming(GP).Contributionsfromtheforemostinternationalresearchersan