#16591: make sympy Diophantine functions work with symbolic expressions
-------------------------+-------------------------------------------------
Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: symbolics | Keywords: interface, solve, equation,
Merged in: | integer
Reviewers: | Authors:
Work issues: | Report Upstream: N/A
Commit: | Branch:
Stopgaps: | Dependencies:
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This should work, shouldn't it?
{{{
sage: from sympy.solvers.diophantine import diop_solve
sage: var('x,y,m')
(x, y, m)
sage: diop_solve(2*x + 3*y - 5, m)
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
<ipython-input-10-bda9278b9cd0> in <module>()
----> 1 diop_solve(Integer(2)*x + Integer(3)*y - Integer(5), m)
/home/ralf/sage/local/lib/python2.7/site-
packages/sympy/solvers/diophantine.py in diop_solve(eq, param)
158 diophantine()
159 """
--> 160 var, coeff, eq_type = classify_diop(eq)
161
162 if eq_type == "linear":
/home/ralf/sage/local/lib/python2.7/site-
packages/sympy/solvers/diophantine.py in classify_diop(eq)
220 ([x, y], {1: 5, x: 1, x**2: 1, y: 0, y**2: 1, x*y: -1},
'binary_quadratic')
221 """
--> 222 eq = eq.expand(force=True)
223 var = list(eq.free_symbols)
224 var.sort(key=default_sort_key)
/home/ralf/sage/local/lib/python2.7/site-
packages/sage/symbolic/expression.so in
sage.symbolic.expression.Expression.expand
(build/cythonized/sage/symbolic/expression.cpp:19411)()
TypeError: expand() got an unexpected keyword argument 'force'
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16591>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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