Fig. 1From: Modularity in complex multilayer networks with multiple aspects: a static perspectiveAspect–aspect representation of the multilayer network model (Kivelä et al. 2014). Aspect (I) has two layer sets and aspect (II) has three layer sets. The within-layer edges are denoted with solid lines and the couplings are denoted with dotted lines where different colors indicate the couplings of different aspectsBack to article page