“…In fact, studies of traveling wave solutions on reaction-diffusion equations u t (x, t) = ∆u(x, t) + f (u(x, t)), x ∈ R N , t > 0, which can be originated from the pioneer work of Fisher [6], have attracted a lot of attention [4,10,11,23,24,42], which mainly focus on 1-D traveling wave solutions and planar traveling wave solutions in R N (N ≥ 2). The gradually mature theory of 1-D traveling wave solutions promotes the research on multidimensional traveling wave solutions, which are proper to describe the traveling wave phenomena in multidimensional space, see [2,3,13,14,15,28,29,34,35,44] for the scalar equation and [5,16,17,18,19,27,36,43,45,46] for the reaction diffusion system.…”