sympy/sympy — pull request #1361 by Krastanov (2012-06-18 22:16:42+00:00)
Title: Vector analysis 3

Just some cumulative changes. There is no fundamental reason to make the pull request now, however the number of LoCs seems appropriate. In the diffs there are some things that are already in vector_analysis_2. When va_2 gets merged, the diffs will get simpler.