Hi,
In the latest version of sage 6.4.1 the following code failed.
I didn't have any problem with 6.2 version of sage.
sage:
U=[-245369975623514803521420211420402474815373720177518420696215292670924086780233779586506792145074717/4069861969699146045958032034788970995470603578576,
-696053034387689435413673877713244121475782562610666903528251447608130654196417305610237634015759861/4069861969699146045958032034788970995470603578576,
-49356694805693369953216822105035107974083562942605713355717183776373331122267882948881129025418396548321363993080002121985116427859996985649385099335/4069861969699146045958032034788970995470603578576,
5996724761485351384753083917633373954904218466995628499407992841502416127074022935350022919212488198205525833829916828282709837728834438536000230267/1017465492424786511489508008697242748867650894644,
-1943033527672518505867347410801184866534773028979571976479290969993491996577167508758887358085512124817167326269402804641328588524702957475568608101932310746684310251168033629279636817525659690186705/4069861969699146045958032034788970995470603578576]
sage: E=EllipticCurve(QQ,U);
sage: point=E([283188771261789732541662405743402980051199109235,
39175522019721182331498476245534716069785193060995, 1]);
sage: point.height();
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_8.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
-*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("cG9pbnQuaGVpZ2h0KCk7"),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpSQSeuN/___code___.py", line 2, in <module>
exec compile(u'point.height();
File "", line 1, in <module>
File
"/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/schemes/elliptic_curves/ell_point.py",
line 2655, in height
h = Emin.pari_curve().ellheight(P, precision=precision)
File "sage/libs/pari/gen.pyx", line 6051, in
sage.libs.pari.gen.gen.ellheight
(build/cythonized/sage/libs/pari/gen.c:29422)
File "sage/libs/pari/handle_error.pyx", line 90, in
sage.libs.pari.handle_error._pari_handle_exception
(build/cythonized/sage/libs/pari/handle_error.c:1112)
sage.libs.pari.gen.PariError: unknown type 0
Sage failed to compute the canonical height.
any ideas?
K.D.
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