The archive ZDT2_DEMO.zip containts the approximation sets for the problem ZDT2 
found by the DEMO algorithm, implemented as described in paper:

T. Robic and B. Filipic. DEMO: Differential Evolution for Multiobjective Optimization. 
(submitted to the conference on Evolutionary Multiobjective Optimization EMO 2005) 

The files in the archive containing the approximation sets have the form 
ZDT2.DEMO.X.Y.Z.set, where:

- X means the applied DEMO variant: 
	parent      = DEMO/parent
	closest_dec = DEMO/closest/dec
	closest_obj = DEMO/closest/obj
	
- Y stands for the used crossover probability: 
	c30 = crossover probability 30%
	c60 = crossover probability 60%
	c90 = crossover probability 90%
	
- Z denotes the run (from 01 to 10).

Population size was 100 and number of generations was 250.

The file ZDT2.DEMO.metrics contains the generational distance, convergence and diversity 
metric values for each approximation set.

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