File: SWAP_EXISTS_CONV.doc

package info (click to toggle)
hol88 2.02.19940316-28
  • links: PTS
  • area: main
  • in suites: jessie, jessie-kfreebsd
  • size: 65,924 kB
  • ctags: 21,595
  • sloc: ml: 199,939; ansic: 9,666; sh: 7,118; makefile: 6,075; lisp: 2,747; yacc: 894; sed: 201; cpp: 87; awk: 5
file content (21 lines) | stat: -rw-r--r-- 432 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
\DOC SWAP_EXISTS_CONV

\TYPE {SWAP_EXISTS_CONV : conv}

\SYNOPSIS
Interchanges the order of two existentially quantified variables.

\KEYWORDS
conversion, quantifier, existential.

\DESCRIBE
When applied to a term argument of the form {?x y. P}, the conversion
{SWAP_EXISTS_CONV} returns the theorem:
{
   |- (?x y. P) = (?y x. P)
}
\FAILURE
{SWAP_EXISTS_CONV} fails if applied to a term that is not of the form
{?x y. P}.

\ENDDOC