Theorem elvd 2804

Description: Technical lemma used to shorten proofs. If a proposition is implied by 𝑥 ∈ V (which is true, see vex 2802) and another antecedent, then it is implied by the other antecedent. (Contributed by Peter Mazsa, 23-Oct-2018.)

Hypothesis

Ref	Expression
elvd.1	⊢ ((𝜑 ∧ 𝑥 ∈ V) → 𝜓)

Assertion

Ref	Expression
elvd	⊢ (𝜑 → 𝜓)

Proof of Theorem elvd

Step	Hyp	Ref	Expression
1		vex 2802	. 2 ⊢ 𝑥 ∈ V
2		elvd.1	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ V) → 𝜓)
3	1, 2	mpan2 425	1 ⊢ (𝜑 → 𝜓)

Syntax hints:   → wi 4   ∧ wa 104   ∈ wcel 2200  Vcvv 2799

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1493  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-ext 2211

This theorem depends on definitions:  df-bi 117  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-v 2801

This theorem is referenced by:  omp1eomlem  7249  subrgpropd  14202  imasnopn  14958  pw1nct  16300