Deletion of Mathematics and mechanics of complex systems

Comment: This journal is listed in MathSciNet and in Zentralblatt MATH. As far as I know these are reliable third party sources for the mathematics field, and as far as I know both are selective. We've already had this discussion, perhaps two years ago, with WikiProject Mathematics editors, when some were adding Mathematics academic journals to Wikipedia. I think trivializing these databases requires sources to back up that they are trivial. WOS is not the only selective database. Also, we go by what  says more than stated opinions
Stance: keep
Cited policy: Wikipedia:Notability (WP:NJOURNALS)

Comment: Indexing in MathSciNet meets  alone. Zentralblatt MATH further drives the point home
Stance: keep
Cited policy: Wikipedia:Notability (WP:NJOURNALS)

Comment: to Mathematical Sciences Publishers.  The reasoning at the  essay makes it clear that coverage in selective indexes is what is required, and MR and ZM are comprehensive rather than selective
Stance: merge
Cited policy: Wikipedia:Notability (WP:NJOURNALS)