Parallels between the perfect and abundant numbers and their recursive analogs point to deeper structure in the recursive divisor function.
Recursively divisible numbers are a new kind of number that are highly divisible, whose quotients are highly divisible, and so on.
A theoretical model of recursive innovation suggests that new technologies are recursively built up from new combinations of existing ones.
Identifying ranking hierarchies in complex networks is of paramount importance in many disciplines and applications
In systems of innovation, the relative usefulness of different components changes as the number of components we possess increases.
The information needed to self-assemble a structure quantifies its modularity and explains the prevalence of certain structures over others.