Editorial: Staying Healthy and Strong Together

Evolutionary construction by staying together and coming together.

The evolutionary trajectory of life on earth is one of increasing size and complexity. Yet the standard equations of evolutionary dynamics describe mutation and selection among similar organisms that compete on the same level of organization. Here we begin to outline a mathematical theory that might help to explore how evolution can be constructive, how natural selection can lead from lower to ...

Moving and staying together without a leader

A microscopic, stochastic, minimal model for collective and cohesive motion of identical self-propelled particles is introduced. Even though the particles interact strictly locally in a very noisy manner, we show that cohesion can be maintained, even in the zero-density limit of an arbitrarily large flock in an infinite space. The phase diagram spanned by the two main parameters of our model, w...

Staying Together: Protein Molecules in Mesoscopic Clusters.

Collective behavior of protein molecules in solutions is critically important for understanding their biological functions, as well as for efficient control of various technological processes. A number of recent experimental studies have observed the formation of various clusters in protein solutions in different systems (1–5). While the existence of small molecular complexes in solutions is a ...

Rank Aggregation: Together We're Strong

We consider the problem of finding a ranking of a set of elements that is “closest to” a given set of input rankings of the elements; more precisely, we want to find a permutation that minimizes the Kendall-tau distance to the input rankings, where the Kendall-tau distance is defined as the sum over all input rankings of the number of pairs of elements that are in a different order in the input...

Staying Healthy Naturally in the Third World