Redlog Documentation

documentationgenericrlbvarl
rlbvarl – list of bound variables

Calling Sequence

rlbvarl \((\,\varphi\,)\)

Arguments

\(\varphi\) first-order formula

Returns

\(L\) list of variables

Description

Returns the set of all variables that have a bound occurrence in \(\varphi\) as a list. \(L\) is sorted according to the Reduce kernel order.

An occurrence of a variable is an occurrence inside an atomic formula. A bound occurrence is an occurrence within the scope of a corresponding quantifier. Note that by this definition, variables that are quantified but do not appear in any atomic formulas do not occur at all.

Example

rlbvarl(ex({w, x, y, z}, v=0 and x=0 and y=0) and w=0 and y=0);

See Also