Theorem spcgv 3595

Description: Rule of specialization, using implicit substitution. Compare Theorem 7.3 of [Quine] p. 44. (Contributed by NM, 22-Jun-1994.) Avoid ax-10 2145, ax-11 2161. (Revised by Wolf Lammen, 25-Aug-2023.)

Hypothesis

Ref	Expression
spcgv.1	⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓))

Assertion

Ref	Expression
spcgv	⊢ (𝐴 ∈ 𝑉 → (∀𝑥𝜑 → 𝜓))

Distinct variable groups:   𝜓,𝑥   𝑥,𝐴

Allowed substitution hints:   𝜑(𝑥)   𝑉(𝑥)

Proof of Theorem spcgv

Step	Hyp	Ref	Expression
1		elex 3512	. 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V)
2		id 22	. . 3 ⊢ (𝐴 ∈ V → 𝐴 ∈ V)
3		spcgv.1	. . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓))
4	3	adantl 484	. . 3 ⊢ ((𝐴 ∈ V ∧ 𝑥 = 𝐴) → (𝜑 ↔ 𝜓))
5	2, 4	spcdv 3593	. 2 ⊢ (𝐴 ∈ V → (∀𝑥𝜑 → 𝜓))
6	1, 5	syl 17	1 ⊢ (𝐴 ∈ 𝑉 → (∀𝑥𝜑 → 𝜓))

Syntax hints:   → wi 4   ↔ wb 208  ∀wal 1535   = wceq 1537   ∈ wcel 2114  Vcvv 3494

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-ext 2793

This theorem depends on definitions:  df-bi 209  df-an 399  df-ex 1781  df-sb 2070  df-clab 2800  df-cleq 2814  df-clel 2893  df-v 3496

This theorem is referenced by:  spcv  3606  mob2  3706  intss1  4891  dfiin2g  4957  alxfr  5308  fri  5517  isofrlem  7093  tfisi  7573  limomss  7585  nnlim  7593  f1oweALT  7673  pssnn  8736  findcard3  8761  ttukeylem1  9931  rami  16351  ramcl  16365  islbs3  19927  mplsubglem  20214  mpllsslem  20215  uniopn  21505  chlimi  29011  dfon2lem3  33030  dfon2lem8  33035  neificl  35043  ismrcd1  39315  mnuop23d  40622