This is documentation for Mathematica 3, which was
based on an earlier version of the Wolfram Language.
 Calculus`VectorAnalysis` A three-dimensional coordinate system assigns three numbers to each point in space. In defining a coordinate system, one must make a choice about what to measure and how to measure it. Frequently, physical systems exhibit special symmetries or structures that make a particular coordinate system especially useful. Often the main step in a mathematically elegant solution to problems related to these systems is choosing the correct coordinates. A variety of tools for doing calculus in various three-dimensional coordinate systems are provided in this package. Because a given symbolic or numeric expression can mean different things in different coordinate systems, Mathematica must know what coordinate system you are using and what the coordinate variables are. The initial default coordinate system is Cartesian, with coordinate variables Xx, Yy, and Zz. If you are frequently working in another system it may be useful to change the default to that system using SetCoordinates. Coordinate systems and coordinate variables. This loads the package. In[1]:= <