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Figure 1

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One critical point, μ 1 = 3.5, μ 2 = 3.2, θ 1 = 0.6, θ 2 = 1.0, w 11 = w 12 = w 22 = 1, w 21 = 2.
One critical point, μ 1 = 3.5, μ 2 = 3.2, θ 1 = 0.6, θ 2 = 1.0, w 11 = w 12 = w 22 = 1, w 21 = 2.