#14306: regression in solve
------------------------+---------------------------------------------------
Reporter: zimmerma | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-5.9
Component: calculus | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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the following example, which we use in our book (in french) about Sage,
does not work any more with Sage 5.7:
With Sage 5.1:
{{{
sage: var('y z')
sage: solve([x^2*y*z==18,x*y^3*z==24,x*y*z^4==6],x,y,z)
[[x == 3, y == 2, z == 1], [x == (1.33721506733 - 2.68548987407*I), y ==
(-1.70043427146 + 1.05286432575*I), z == (0.932472229404 -
0.361241666187*I)], [x == (1.33721506733 + 2.68548987407*I), y ==
(-1.70043427146 - 1.05286432575*I), z == (0.932472229404 +
0.361241666187*I)], [x == (-2.55065140719 - 1.57929648863*I), y ==
(-0.547325980144 + 1.92365128635*I), z == (-0.982973099684 -
0.183749517817*I)], [x == (-2.55065140719 + 1.57929648863*I), y ==
(-0.547325980144 - 1.92365128635*I), z == (-0.982973099684 +
0.183749517817*I)], [x == (0.27680507839 - 2.98720252889*I), y ==
(1.47801783444 - 1.34739128729*I), z == (-0.85021713573 -
0.526432162877*I)], [x == (0.27680507839 + 2.98720252889*I), y ==
(1.47801783444 + 1.34739128729*I), z == (-0.85021713573 +
0.526432162877*I)], [x == (-0.820988970216 + 2.88547692952*I), y ==
(-1.20526927276 - 1.59603445456*I), z == (0.0922683594633 -
0.995734176295*I)], [x == (-0.820988970216 - 2.88547692952*I), y ==
(-1.20526927276 + 1.59603445456*I), z == (0.0922683594633 +
0.995734176295*I)], [x == (-1.80790390914 - 2.39405168184*I), y ==
(0.891476711553 - 1.79032658271*I), z == (0.739008917221 -
0.673695643647*I)], [x == (-1.80790390914 + 2.39405168184*I), y ==
(0.891476711553 + 1.79032658271*I), z == (0.739008917221 +
0.673695643647*I)], [x == (2.21702675166 + 2.02108693094*I), y ==
(1.86494445881 + 0.722483332374*I), z == (-0.273662990072 -
0.961825643173*I)], [x == (2.21702675166 - 2.02108693094*I), y ==
(1.86494445881 - 0.722483332374*I), z == (-0.273662990072 +
0.961825643173*I)], [x == (2.79741668821 - 1.08372499856*I), y ==
(-1.96594619937 + 0.367499035633*I), z == (-0.602634636379 -
0.79801722728*I)], [x == (2.79741668821 + 1.08372499856*I), y ==
(-1.96594619937 - 0.367499035633*I), z == (-0.602634636379 +
0.79801722728*I)], [x == (-2.94891929905 + 0.55124855345*I), y ==
(0.184536718927 + 1.99146835259*I), z == (0.445738355777 -
0.895163291355*I)], [x == (-2.94891929905 - 0.55124855345*I), y ==
(0.184536718927 - 1.99146835259*I), z == (0.445738355777 +
0.895163291355*I)]]
}}}
With Sage 5.7:
{{{
sage: var('y z')
(y, z)
sage: solve([x^2*y*z==18,x*y^3*z==24,x*y*z^4==6],x,y,z)
[x^2*y*z == 18, x*y^3*z == 24, x*y*z^4 == 6]
}}}
Cf http://sagebook.gforge.inria.fr/
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14306>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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