A mathematical brain teaser challenges people to solve the matchstick equation in just two moves. The puzzle uses matchsticks to create an equation that shows 3 + 3 = 8 and instructs viewers to make ...

We prove the existence of travelling wave solutions in a reaction-diffusion equation with general periodic diffusion coefficients, zero drift coefficients, and combustion nonlinearity in Rn, n ≥ 1. We ...