SET_RULE : term -> thm
STRUCTURE
bossLib
SYNOPSIS
Automatically prove a set-theoretic theorem by reduction to FOL.
LIBRARY
boss
DESCRIPTION
An application DECIDE M, where M is a set-theoretic term, attempts to automatically prove M by reducing basic set-theoretic operators (IN, SUBSET, PSUBSET, INTER, UNION, INSERT, DELETE, REST, DISJOINT, BIGINTER, BIGUNION, IMAGE, SING and GSPEC) in M to their definitions in first-order logic. With SET_RULE, many simple set-theoretic results can be directly proved without finding needed lemmas in pred_setTheory.
EXAMPLE
- SET_RULE ``!s t c. DISJOINT s t ==> DISJOINT (s INTER c) (t INTER c)``;
<<HOL message: inventing new type variable names: 'a>>
metis: r[+0+5]+0+0+0+0+1#
> val it = |- !s t c. DISJOINT s t ==> DISJOINT (s INTER c) (t INTER c): thm
FAILURE
Fails if the underlying resolution machinery used by METIS_TAC cannot prove the goal, e.g. when there are other set operators in the term.
COMMENTS
SET_RULE calls SET_TAC without extra lemmas.
SEEALSO
SET_TAC, ASM_SET_TAC, METIS_TAC
HOL  Trindemossen-1