[seqfan] Re: A174397 and primes with negative value.
franktaw at netscape.net
franktaw at netscape.net
Fri Mar 19 22:27:13 CET 2010
My cut at this is that negations of primes are very definitely prime.
However, "the primes" is usually shorthand for "the primes of N" or
"the primes of the non-negative integers" (these are the same, since 0
is not prime).
This being the case, any use of "prime" to include the negative primes
should be clearly identified. A phrase like "positive or negative
prime" is quite sufficient.
Franklin T. Adams-Watters
-----Original Message-----
From: Richard Mathar <mathar at strw.leidenuniv.nl>
V. Orlovsky is defending his definition in A174397 (with negative
numbers,
obviously) with a link to
http://primes.utm.edu/notes/faq/negative_primes.html
arguing that primes can be negative numbers, so the mention of absolute
values in the definition is not needed. I cannot make friend with that
idea.
Is there a general consensus (at least within the OEIS) that primes are
>=2 ?
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