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-  form of evolutionary computation where the individuals are
computer programs instead of bit strings
-  typically represented by trees corresponding to parse trees of
the program
-  user must define primitive functions
-  fitness is determined by executing the program on the training
data
-  Crossover replaces a randomly chosen subtree from one parent
with one from the other
 
Patricia Riddle 
Fri May 15 13:00:36 NZST 1998