sympy/sympy — pull request #2492 by perseus0807 (2013-10-01 20:19:07+00:00)
Title: Issue 4041: 'Series' undefined in sympy/plotting/plot.py

Fixed [issue #4041](https://code.google.com/p/sympy/issues/detail?id=4041&sort=-opened&colspec=ID%20Type%20Status%20Priority%20Milestone%20Reporter%20Summary%20Stars%20Opened) mentioned on the Google bug tracker.