If we have a physical swarm (not the general swarm).  We could use a Gaussian surface to calculate the flux of the individuals.  Could this be part of the general swarm calculus.  If we defined the domain using features other than distance?  A more general type of Gaussian surface?

Could this be applied to any types of systems.  What useful things could we say then using this info?  Could we model coordination using the ideas of the flow of (simplified idea of) electrons in a wire?

Combine this with the idea of how to model coordination.  Could we then model the general swarm?