Updates:
Status: Started
Owner: mattpap
Labels: NeedsReview
Comment #2 on issue 1009 by mattpap: solve(e, k) hangs
http://code.google.com/p/sympy/issues/detail?id=1009
A patch for this is available in polys8 branch. The true problem is with
is_zero
which hangs and made roots() fail, e.g.:
In [1]: var("zz yy xx zy zx yx k")
Out[1]: (zz, yy, xx, zy, zx, yx, k)
In [2]: e1=(zz-k)*(yy-k)*(xx-k) + zy*yx*zx + zx-zy-yx
In [3]: e2=(zz-k)*yx*yx + zx*(yy-k)*zx + zy*zy*(xx-k)
In [4]: e = (e1 - e2).expand()
In [5]: e.is_zero
[hang]
roots() doesn't need it so it works now. For is_zero a separate issue
should be open.
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