Figure 4.

Unsupervised Hebbian learning rule. (A) Piecewise linear transfer function. The dashed gray horizontal line indicates the plasticity threshold r_w. (B) Post-synaptic dependence on the rates of the stationary connectivity function, f(r). The vertical dashed gray line indicates the plasticity threshold. (C) Contour plot of the stationary connectivity function, 𝕎_maxf(r_i)g(r_j). The dashed gray box indicates the plasticity threshold. For W_i,j = 0.5w_max the red region below the dashed green line corresponds to LTD while the yellow region above it to LTP. Parameters can be found in Table S3.