Users' Mathboxes Mathbox for BJ < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  bj-rcleqf Structured version   Visualization version   GIF version

Theorem bj-rcleqf 38030
Description: Relative version of cleqf 2950. (Contributed by BJ, 27-Dec-2023.)
Hypotheses
Ref Expression
bj-rcleqf.a Ⅎ𝑥𝐴
bj-rcleqf.b Ⅎ𝑥𝐵
bj-rcleqf.v Ⅎ𝑥𝑉
Assertion
Ref Expression
bj-rcleqf ((𝑉 ∩ 𝐴) = (𝑉 ∩ 𝐵) ↔ ∀𝑥 ∈ 𝑉 (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵))

Proof of Theorem bj-rcleqf
StepHypRef Expression
1 elin 4093 . . . . 5 (𝑥 ∈ (𝑉 ∩ 𝐴) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐴))
2 elin 4093 . . . . 5 (𝑥 ∈ (𝑉 ∩ 𝐵) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵))
31, 2bibi12i 342 . . . 4 ((𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)) ↔ ((𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐴) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵)))
4 pm5.32 584 . . . 4 ((𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) ↔ ((𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐴) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵)))
53, 4bitr4i 281 . . 3 ((𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)) ↔ (𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)))
65albii 1851 . 2 (∀𝑥(𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)) ↔ ∀𝑥(𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)))
7 bj-rcleqf.v . . . 4 Ⅎ𝑥𝑉
8 bj-rcleqf.a . . . 4 Ⅎ𝑥𝐴
97, 8nfin 4121 . . 3 Ⅎ𝑥(𝑉 ∩ 𝐴)
10 bj-rcleqf.b . . . 4 Ⅎ𝑥𝐵
117, 10nfin 4121 . . 3 Ⅎ𝑥(𝑉 ∩ 𝐵)
129, 11cleqf 2950 . 2 ((𝑉 ∩ 𝐴) = (𝑉 ∩ 𝐵) ↔ ∀𝑥(𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)))
13 df-ral 3077 . 2 (∀𝑥 ∈ 𝑉 (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵) ↔ ∀𝑥(𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)))
146, 12, 133bitr4i 306 1 ((𝑉 ∩ 𝐴) = (𝑉 ∩ 𝐵) ↔ ∀𝑥 ∈ 𝑉 (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401  ∀wal 1567   = wceq 1569   ∈ wcel 2144  Ⅎwnfc 2907  ∀wral 3076   ∩ cin 4089
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-11 2193  ax-12 2212  ax-ext 2732
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-tru 1572  df-ex 1812  df-nf 1816  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ral 3077  df-v 3452  df-in 4091
This theorem is used by:  bj-rcleq  38031  bj-reabeq  38032
  Copyright terms: Public domain W3C validator