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Bug when solving multivariate polynomial systems with identical equations #14645

apotschka opened this Issue Apr 19, 2018 · 1 comment


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apotschka commented Apr 19, 2018

Here's some output from SymPy Live, which runs SymPy 1.0:

>>> import sympy as sym
>>> x, y = sym.symbols('x, y')
>>> sym.solve([x*y - x - y], [x, y])
[{x: y/(y - 1)}]
>>> sym.solve([x*y - x - y, x*y - x - y], [x, y])

The correct result of the last call to solve should be [{x: y/(y - 1)}] instead of [].

skirpichev added a commit to skirpichev/diofant that referenced this issue Apr 19, 2018


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czgdp1807 commented Jul 9, 2018

I would like to work on this issue. Can I make a PR on this, after working on its solution?. :-)

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