The Journal of Diff. Equations was considered as a good journal in the field of differential equations and dynamical systems, and was given the A* ranking (the highest ranking) by the Australian system. I even considered submitting a paper to that journal. But now I have serious doubts about their quality and the seriousness of their Editorial Board, after discovering that a guy (which I will not name here) published 3 papers in it in a year last year. There is nothing wrong per se in sending 3 papers to a same journal within a year. But things start to look suspicious when:
* that guy published nearly 300 papers, but was cited less than 600 times (per MathSciNet), meaning only 2 citations per paper. Most of them are, without a doubt, self-citations or citations by his direct collaborators.
* I tried to read a paper of his, and found it of very “modest” quality. (It’s not surprising, given the fact that his many papers were not very appreciated and cited by people other than his students and direct collaborators). But why did J Diff Equ accept so many papers of “modest” quality from him ?!
Now, this is a journal published by Elsevier. Elsevier has become notorious for their very loosy scientific standards. So it may be quite logical that J Diff Equ also went downhill. One more reason to boycott Elsevier !