That is indeed a bug. A fix is up for review at http://trac.sagemath.org/sage_trac/ticket/13218, along with 100% doctest coverage of laurent_series_ring (which caught a few other bugs too). David
On Mon, Jul 9, 2012 at 4:27 AM, John Cremona <john.crem...@gmail.com> wrote: > sage: R, x = PowerSeriesRing(ZZ, 'x', default_prec = 80).objgen() > sage: f = x + x^2 > sage: f.parent() > Power Series Ring in x over Integer Ring > sage: f.parent().default_prec() > 80 > sage: g = 1/f > sage: g.parent() > Laurent Series Ring in x over Integer Ring > sage: g.parent().default_prec() > 20 (??????) > sage: h = 1/2 * f > sage: h.parent() > Power Series Ring in x over Rational Field > sage: h.parent().default_prec() > 80 > -- -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
