4
As you know, there are journals -predatory journals- which are just publishing scams, without actual peer review, etc. but look like genuine ones, and it is a problem for the honest researcher to avoid them. Until recently there was a free blacklist, Jerry Beall's (which had flaws), and now there...
Two simple remarks:
The polynomial $x^k-1$ can be factorised over the integers as a product of (irreducible) cyclotomic polynomials: $$x^k-1 = \prod_{d|k}\Phi_d(x).$$
If we choose $k$ to be a number that has a lot of divisors, then $x^k-1$ will have a lot of factors. For example, if $k$ is a pr...
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As you know, there are journals -predatory journals- which are just publishing scams, without actual peer review, etc. but look like genuine ones, and it is a problem for the honest researcher to avoid them. Until recently there was a free blacklist, Jerry Beall's (which had flaws), and now there...
