Having been crafted to welcome a new scientific journal, this paper looks forward but requires no special prerequisite. The argument builds on a technical wrinkle (used earlier but explained here fully for the first time), namely, the author’s grid-bound variant of Brownian motion B(t). While...

We introduce a reaction diffusion model on a lattice involving two particles species, A and B. B particles initially fill the lattice, and A particles diffuse transforming B particles to A particles each time they meet. We keep the number of A particles constant eliminating the oldest ones. The...