Birth, Death, and Horizontal Flight: Malthusian flocks with an easy
plane in three dimensions
Birth, Death, and Horizontal Flight: Malthusian flocks with an easy
plane in three dimensions
I formulate the theory of three dimensional "Malthusian flocks" -- i.e., coherently moving collections of self-propelled entities (such as living creatures) which are being "born" and "dying" during their motion -- whose constituents all have a preference for having their velocity vectors lie parallel to the same two-dimensional plane. I …