Description: Bound-variable hypothesis builder for the intersection of classes. (Contributed by NM, 15-Sep-2003) (Revised by Mario Carneiro, 14-Oct-2016) Avoid ax-10 , ax-11 , ax-12 . (Revised by SN, 14-May-2025)
|- F/_ x A
|- F/_ x B
|- F/_ x ( A i^i B )
|- ( y e. ( A i^i B ) <-> ( y e. A /\ y e. B ) )
|- F/ x y e. A
|- F/ x y e. B
|- F/ x ( y e. A /\ y e. B )
|- F/ x y e. ( A i^i B )