sympy/sympy — pull request #2128 by katjasophie (2013-05-20 23:25:33+00:00)
Title: Add support for function fields in minpoly

```minpoly``` now additionally works with algebraic functions.
```
In [1]: minpoly(sqrt(x), y)
Out[1]:
2
-x + y

In [2]: minpoly(sqrt(x) / z, y)
Out[2]:
2 2
-x + y ⋅z
```
This replaces my PR #2100.