Hi
If I do
a=Symbol('a', real=True)
b=Symbol('b')
and do
solve(a**2-1,a)
I get
[−1, 1]
solve(b**2-1,b)
[−1, 1]
as expected.
solve(a**2+1,a)
I get
[ ]
solve(b**2+1,b)
[−i, i]
again, ok.
But
solve(sympify("a**2+1"),a)
[]
*solve(sympify("a**2-1"),a)*
*[]*
solve(sympify("b**2-1"),b)
[−1, 1]
solve(sympify("b**2+1"),b)
[−i, i]
So solve(sympify("something with a"), a) will always return the empty list.
Why is that?
Any argument I could pass to sympify to amend this?
The same its true for solveset.
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