Metamath Proof Explorer

Theorem exan

Description: Place a conjunct in the scope of an existential quantifier. (Contributed by NM, 18-Aug-1993) (Proof shortened by Andrew Salmon, 25-May-2011) (Proof shortened by Wolf Lammen, 13-Jan-2018) Reduce axiom dependencies. (Revised by BJ, 7-Jul-2021) (Proof shortened by Wolf Lammen, 6-Nov-2022) Expand hypothesis. (Revised by Steven Nguyen, 19-Jun-2023)

Ref Expression
Hypotheses exan.1 x φ
exan.2 ψ
Assertion exan x φ ψ


Step Hyp Ref Expression
1 exan.1 x φ
2 exan.2 ψ
3 2 jctr φ φ ψ
4 1 3 eximii x φ ψ