The bug is in multiplication algorithm:
in sage/rings/polynomial/polynomial_real_mpfr_dense.pyx
in function that does ring multiplication:
cpdef RingElement _mul_(left, RingElement _right):
there is line 431:
cdef PolynomialRealDense f = left._new(left._degree + right._degree)
that is creates a
even better:
sage: P. = PolynomialRing(RealField())
sage: P(0)*P(0)+P(0)
Program received signal SIGSEGV, Segmentation fault.
On Feb 7, 10:10 pm, Dima Pasechnik wrote:
> On Feb 7, 6:59 pm, Florent Hivert
> wrote:
>
>
>
> > Hi
>
> > On Sun, Feb 07, 2010 at 02:49:53AM -0800, Kiran Kedlaya wr
On Feb 7, 6:59 pm, Florent Hivert
wrote:
> Hi
>
> On Sun, Feb 07, 2010 at 02:49:53AM -0800, Kiran Kedlaya wrote:
> > The following input segfaults sage 4.3.2 on sage.math, as well as sage
> > 4.3 on various other machines.
>
> > P. = PolynomialRing(RealField())
> > print sum(P(0)*P(0) for k i
