Is this a possibly related issue:
sage: O(7^0)
---------------------------------------------------------------------------
ArithmeticError Traceback (most recent call last)
<ipython-input-1-85f5f0a44709> in <module>()
----> 1 O(Integer(7)**Integer(0))
/usr/local/sage/sage-current/local/lib/python2.7/site-packages/sage/rings/big_oh.pyc
in O(*x)
84 F = arith.factor(x)
85 if len(F) != 1:
---> 86 raise ArithmeticError("x must be prime power")
87 p, r = F[0]
88 if r >= 0:
ArithmeticError: x must be prime power
On Tuesday, 2 September 2014 17:02:45 UTC+2, John Cremona wrote:
>
> On 29 August 2014 12:32, Simon King <simon...@uni-jena.de <javascript:>>
> wrote:
> > Hi John,
> >
> > On 2014-08-29, John Cremona <john.c...@gmail.com <javascript:>> wrote:
> >> 1 is definitely not a prime power.
> >
> > OEIS says it is: http://oeis.org/A000961
>
> Not any more: http://oeis.org/A246655. The OEIS now distinguishes
> between "prime powers" and "powers of primes".
>
> John
>
> >
> >> It's basically the same reason that 1
> >> is not a prime.
> >
> > It's basically the same reason that the empty product evaluates to 1.
> >
> > Best regards,
> > Simon
> >
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