Theorem bj-vtoclgft 12982

Description: Weakening two hypotheses of vtoclgf 2744. (Contributed by BJ, 21-Nov-2019.)

Hypotheses

Ref	Expression
bj-vtoclgf.nf1	⊢ Ⅎ𝑥𝐴
bj-vtoclgf.nf2	⊢ Ⅎ𝑥𝜓
bj-vtoclgf.min	⊢ (𝑥 = 𝐴 → 𝜑)

Assertion

Ref	Expression
bj-vtoclgft	⊢ (∀𝑥(𝑥 = 𝐴 → (𝜑 → 𝜓)) → (𝐴 ∈ 𝑉 → 𝜓))

Proof of Theorem bj-vtoclgft

Step	Hyp	Ref	Expression
1		elex 2697	. 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V)
2		bj-vtoclgf.nf1	. . . 4 ⊢ Ⅎ𝑥𝐴
3	2	issetf 2693	. . 3 ⊢ (𝐴 ∈ V ↔ ∃𝑥 𝑥 = 𝐴)
4		bj-vtoclgf.nf2	. . . 4 ⊢ Ⅎ𝑥𝜓
5		bj-vtoclgf.min	. . . 4 ⊢ (𝑥 = 𝐴 → 𝜑)
6	4, 5	bj-exlimmp 12976	. . 3 ⊢ (∀𝑥(𝑥 = 𝐴 → (𝜑 → 𝜓)) → (∃𝑥 𝑥 = 𝐴 → 𝜓))
7	3, 6	syl5bi 151	. 2 ⊢ (∀𝑥(𝑥 = 𝐴 → (𝜑 → 𝜓)) → (𝐴 ∈ V → 𝜓))
8	1, 7	syl5 32	1 ⊢ (∀𝑥(𝑥 = 𝐴 → (𝜑 → 𝜓)) → (𝐴 ∈ 𝑉 → 𝜓))

Syntax hints:   → wi 4  ∀wal 1329   = wceq 1331  Ⅎwnf 1436  ∃wex 1468   ∈ wcel 1480  Ⅎwnfc 2268  Vcvv 2686

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121

This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-v 2688

This theorem is referenced by:  bj-vtoclgf  12983  elabgft1  12985  bj-rspgt  12993