#5919: [with patch, needs review] bug in conversion of polys over GF(2,e) from
NTL
to singular
---------------------+------------------------------------------------------
Reporter: cremona | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.2
Component: algebra | Keywords: polynomial finite field
---------------------+------------------------------------------------------
In 3.4.2.alpha0 we have
{{{
sage: F.<a> = GF(2^16)
sage: R.<x, y> = F[]
sage: R({(1,2):1})
0*x*y^2
}}}
which Alex Ghitza tracked down to a line in libs/singular/singular.pyx and
which I fixed by replacing one character in that line from 'i' to '0'.
After that:
{{{
sage: sage: F.<a> = GF(2^16)
sage: sage: R.<x, y> = F[]
sage: sage: R({(1,2):1})
x*y^2
}}}
and hence also
{{{
sage: Fx.<b>=GF(2^(4*5))
sage: Ex=EllipticCurve(Fx,[0,0,1,1,1])
sage: Ex.defining_polynomial()
x^3 + y^2*z + x*z^2 + y*z^2 + z^3
}}}
which was not working properly (as reported to sage-devel).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5919>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en
-~----------~----~----~----~------~----~------~--~---
