Comment #3 on issue 2405 by [email protected]: solve and solve_poly_system
can give ambiguous results
http://code.google.com/p/sympy/issues/detail?id=2405
OK, here is where solve_poly_system is ambiguous (like solve):
h[1] >>> from sympy.solvers.polysys import solve_poly_system as so
h[1] >>> so([x-y-3,x+y+5]) # is it x, y or y, x?
[(-1, -4)]
h[2] >>> so([Poly(x-y-3,x,y),Poly(x+y+5,x,y)]) # both gens the same so
x, y
[(-1, -4)]
x,y and y,x gens
h[2] >>> so([Poly(x-y-3,x,y),Poly(x+y+5,y,x)]) # same order as first
gens ?
[(-1, -4)]
y,x and x,y gens
h[3] >>> so([Poly(x-y-3,y,x),Poly(x+y+5,x,y)])
[(-4, -1)]
y,x and y,x gens
h[2] >>> so([Poly(x-y-3,y,x),Poly(x+y+5,y,x)])
[(-4, -1)]
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