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removed mathobjects for now... re-adding shortly
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pg/doc/MathObjects:
README.pod
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-=head1 NAME
-
-MathObjects - Object system for manipulating mathematics in PG.
-
-=head1 OVERVIEW
-
-This directory contains the documentation for a new
-mathematical-expression parser written in perl. It was developed for
-use with the WeBWorK on-line homework system, but it can be used in
-any perl program.
-
-The goal was to process vector-valued expressions, but the parser was
-designed to be extensible, so that you could add your own functions,
-operators, and data types. It is still a work in progress, but should
-provide a framework for building more sophisticated expression handling.
-
-Currenlty, the parser understands:
-
-=over
-
-=item * real and complex numbers,
-
-=item * points, vectors, and matrices (with real or complex entries)
-
-=item * arbitrary lists of elements
-
-=item * intervals and unions of intervals
-
-=item * predefined strings like 'infinity'
-
-=back
-
-Some other useful features are that you can write sin^2 x for (sin(x))^2
-and sin^-1 x for arcsin(x), and so on.
-
-Most of the documentation still needs to be written, but you can get some
-ideas from the samples in the problems and extensions directories, and by
-reading the files in the docs directory.
-
-=head1 INSTALLATION
-
-The parser should already be installed as part of the WeBWorK 2.1
-distribution, so you should not need to install it separately. If you
-don't seem to have it installed, then it can be obtained from the
-Union CVS repository at
-http://devel.webwork.rochester.edu/twiki/bin/view/Webwork/WeBWorKCVS
-
-The README file in that directory contains the installation instructions.
-
-=head1 SAMPLE FILES
-
-Sample problems are given in the problems and extensions directories. Move
-these to the templates directory of a course where you want to test the
-Parser, and move the contents of the macros directory to that course's
-macros directory.
-
-Now try looking at these problems using the Library Browser. Edit the
-source to see how they work, and to read the comments within the code
-itself.
-
-=head1 EXAMPLE FILES
-
-The 'problems' directory contains several examples that show how to use
-Parser within your problem files.
-
-=over
-
-=item problems/sample01.pg
-
-Uses the parser to make a string into a formula that you can
-evaluate and print in TeX form
-
-=item problems/sample02.pg
-
-Shows how to create formulas using perl's usual mathematical
-expressions rather than character strings.
-
-=item problems/sample03.pg
-
-Shows how to use the parser's differentiation abilities.
-
-=item problems/sample04.pg
-
-=item problems/sample05.pg
-
-Use the parser in conjunction with the graphics macros to generate
-function graphs on the fly. These also show how to create a
-perl function to evaluate an expression.
-
-=item problems/sample06.pg
-
-Shows some simple use of vectors in a problem.
-
-=item problems/sample07.pg
-
-Example if using the build-in Real object and its answer
-checker
-
-=item problems/sample08.pg
-
-Uses complex numbers and the built-in checker
-
-=item problems/sample09.pg
-
-=item problems/sample10.pg
-
-Demonstrates points and vectors and their answer checkers
-
-=item problems/sample11.pg
-
-=item problems/sample12.pg
-
-Shows the answer checkers for intervals and unions.
-
-=item problems/sample13.pg
-
-=item problems/sample14.pg
-
-=item problems/sample15.pg
-
-Demonstrate various list checkers, including a check for the
-word 'NONE', which is a predefined string.
-
-=item problems/sample16.pg
-
-=item problems/sample17.pg
-
-=item problems/sample18.pg
-
-These show the multi-variable function checker in use (for
-functions of the form R->R, R^2->R and R->R^3).
-
-=item problems/sample19.pg
-
-Uses the function checker to implement a "constant" that can
-be used in formulas.
-
-=item problems/sample20.pg
-
-Shows how to use the parser's substitution abilities.
-
-=item problems/sample21.pg
-
-Checks for a list of points.
-
-=item problems/sample22.pg
-
-Shows how to provide named constants that the student can
-use in his answer.
-
-=back
-
-The 'examples' directory contains samples that show how to extend the
-parser to include your own functions, operators, and so on. There are also
-some samples of how to call the methods available for Formula objects
-generated by the parser, and what some error messages look like.
-
-=over
-
-=item examples/1-function.pg
-
-Adds a single-variable function to the parsers list of functions.
-
-=item examples/2-function.pg
-
-Adds a two-variable function to the parser.
-
-=item examples/3-operator.pg
-
-Adds a binary operator to the parser. (Unary operators are similar.)
-
-=item examples/4-list.pg
-
-Adds a new "list type" object. In this case, it's really an
-operation [n,r] that returns n choose r.
-
-=item examples/5-list.pg
-
-Add a new "equality" operator that you can use to handle answers
-like "x+y=0".
-
-=item examples/6-precedence.pg
-
-Shows an experimental precedence setting that can be used to make
-sin 2x return sin(2x) rather than (sin(2))x.
-
-=item examples/7-context.pg
-
-Shows how to switch contexts (in this case, to complex and to vector
-contexts), and how this affects the parsing.
-
-=item examples/8-answer.pg
-
-Implements a simple vector-valued answer checker using the
-parser's computation and comparison ability.
-
-=back
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