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. 2016 Nov 7;6:35831. doi: 10.1038/srep35831

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(a) Network activity ρ(I, W) as a function of I for several W; (b) Susceptibility χ(I, W) as a function of W for several I. Notice the divergence χ_C(I) ∝ I^−1/2 for small I; (c) Firing rate of an isolated neuron ρ(I, W = 0) for monomial exponents r = 0.5, 1 and 2.