applyRulebase           Repeatedly apply a rulebase to an input
                        object...
as.character.rule       Convert a rule to a character string.
callName                Get the name or argument list of a call...
combineRulebase         Combine several rules / rulebases into a new
                        rulebase.
first                   Functions for Lisp-like list processing...
is.evaluable            Heuristically test expressions for
                        evaluability...
is.symbolic             Test if an object is a symbolic expression...
patmatch                Pattern matching with predicates...
print.rule              Print a rule in human readable format.
rule                    Rules and Rule Bases...
rulebasedSimplify       Simplifies an expression using a rule based
                        simplification algorithm.
simplify                Simplify a symbolic expression...
