Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.
Updated
Claim. A. Schinzel and E. Wirsing, Multiplicative properties of the partition function, Proc. Indian Acad. Sci. Math. Sci. 97 (1987), nos. 1–3, 297–303. Write for the number of multiplicatively independent values of in , and for that number in . The paper's Theorem states that there is an such that
for and all , and that the same lower bound applies to the number of distinct prime factors of . Its Corollary 2 gives when , and the paper then states that
The left side is , the number of distinct prime factors of in Problem 1106, so for all large , and in particular ; the site's commentary and the formal-conjectures entry both credit that bound to this paper. The inequality is elementary: positive integers built from primes lie in a free abelian group of rank , so multiplicatively independent values force at least distinct primes. Ono [On00] cites the paper for the bound on the number of primes that divide some .
Covers. The first question: , at the rate . The second question, whether for all large , is not addressed.
Depends on. No page of this wiki: the bound on is stated in the paper.
Acceptance. Refereed: the paper appeared in Proceedings of the Indian
Academy of Sciences (Mathematical Sciences) in December 1987. The site's
commentary credits to this paper, but the site labels the
problem OPEN, so the commentary is not acceptance and no reviewed is
listed. The
formal-conjectures file
states the first question as erdos_1106.parts.i with answer(True), the
category research solved and a sorry body, citing this paper; it is a
statement, not a proof.