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. Author manuscript; available in PMC: 2016 Apr 22.
Published in final edited form as: IEEE Trans Neural Netw Learn Syst. 2014 Oct;25(10):1879–1893. doi: 10.1109/TNNLS.2013.2297686

Fig. 2.

Fig. 2

Here we show a case of two objective functions. u(S) represents the set of all the objective vectors with the Pareto frontier colored in red. The Pareto-optimal solution θ can be determined by minimizing u1 given that u2 is upper-bounded by ε.