# First Order Logic Prop: Manipulate, analyze, and prove logic propositions

 Version License Categories firstorderlogicprop 1.0.0 GNU General Publi... Math
Description

Author

This class allows you to parse first order logic formulas. These formulas can be written in any syntax that you define.

You can apply basic logic operations (and, or, not, implies, etc...).

You can transform proposition (cleaning, developing, disjunctive form, conjunctive form).

You can even make demonstrations of your proposition, by looking up the values table or simply by demonstrating it (simple analysis of the disjunctive form: not too greedy).

The FOLP Checker allows you to prove that a proposition is a theorem, and if it is not, you will be presented a counterexample.

Karnaugh's table and other nice features will be soon added.

Name: Classes: naholyr `` 1 package by naholyr France 43 2999 82 in France 305 12 in France

 Files
File Role Description
demo (2 files)
examples (6 files)
FirstOrderLogicProp.inc.php Class The file containing base class and the checker class

 Files / demo
File Role Description
index.php Example The basic demo: showing the values table, normal forms, and can prove the given formula
syntax.litteral Data Defines litteral syntax for the demo file (it then accepts two syntax, for example "a & b" is the same than "a AND b"). This is an example on how you can add your own supported syntax

 Files / examples
File Role Description
example1.php Example basic operations on propositions
example2.php Example testing EQUALITY (and not equivalence) of formulas
example3.php Example testing if propositions are in disjunctive/conjunctive forms
example4.php Example Show cloning feature, and how to set values to variables in a proposition
example5.php Example Shows how you can extend the base class to have nice HTML output of the values table
example6.php Example Shows conjunctive/disjunctive forms of a proposition. You can see here that the computation time is a bit long :(

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