Evolutionary pathways in epistatic mechanical networks.

Abstract excerpt

An elastic spring network is an example of evolvable matter. It can be pruned to couple separated pairs of nodes so that when a strain is applied to one of them, the other responds either in-phase or out-of-phase. This produces two pruned networks, with incompatible functions, that are nearly identical but differ from each other by a set of "mutations" each of which removes or adds a single bond in the network....

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