Comment #15 on issue 1321 by [email protected]: trigonometric
functions of floating-point numbers should return floating-point numbers
http://code.google.com/p/sympy/issues/detail?id=1321
Sure. On commit 1bde5a30637bcdbe02b546a7e49d8bd203cfb9d0, try
solve(x-0.5,x)
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "sympy/solvers/solvers.py", line 235, in solve
result = roots(poly, cubics=True, quartics=True).keys()
File "sympy/polys/polyroots.py", line 294, in roots
f, x = f.to_field(), f.gen
File "sympy/polys/polytools.py", line 773, in to_field
result = f.rep.to_field()
File "sympy/polys/polyclasses.py", line 1153, in to_field
return f.convert(f.dom.get_field())
File "sympy/polys/algebratools.py", line 1188, in get_field
raise DomainError('there is no field associated with %s' % self)
DomainError: there is no field associated with RR
This is the essence of the problem. ronan informed me someone fixed this in
some other branch. That's why I didn't include this issue in my recent
update. The only real remaining problem is 1) as described in the message
above yours.
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