SWAP_EXISTS_CONV : conv

- STRUCTURE
- SYNOPSIS
- Interchanges the order of two existentially quantified variables.
- DESCRIPTION
- 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.

HOL Kananaskis-14