Users' Mathboxes Mathbox for Scott Fenton < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  brbigcup Structured version   Visualization version   GIF version

Theorem brbigcup 36784
Description: Binary relation over Bigcup . (Contributed by Scott Fenton, 11-Apr-2012.)
Hypothesis
Ref Expression
brbigcup.1 𝐵 ∈ V
Assertion
Ref Expression
brbigcup (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵)

Proof of Theorem brbigcup
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 relbigcup 36783 . . 3 Rel Bigcup
21brrelex1i 5707 . 2 (𝐴 Bigcup 𝐵 → 𝐴 ∈ V)
3 brbigcup.1 . . . 4 𝐵 ∈ V
4 eleq1 2848 . . . 4 (∪ 𝐴 = 𝐵 → (∪ 𝐴 ∈ V ↔ 𝐵 ∈ V))
53, 4mpbiri 261 . . 3 (∪ 𝐴 = 𝐵 → ∪ 𝐴 ∈ V)
6 uniexb 7782 . . 3 (𝐴 ∈ V ↔ ∪ 𝐴 ∈ V)
75, 6sylibr 237 . 2 (∪ 𝐴 = 𝐵 → 𝐴 ∈ V)
8 breq1 5105 . . 3 (𝑥 = 𝐴 → (𝑥 Bigcup 𝐵 ↔ 𝐴 Bigcup 𝐵))
9 unieq 4877 . . . 4 (𝑥 = 𝐴 → ∪ 𝑥 = ∪ 𝐴)
109eqeq1d 2762 . . 3 (𝑥 = 𝐴 → (∪ 𝑥 = 𝐵 ↔ ∪ 𝐴 = 𝐵))
11 vex 3454 . . . . 5 𝑥 ∈ V
12 df-bigcup 36744 . . . . 5 Bigcup = ((V × V) ∖ ran ((V ⊗ E ) △ (( E ∘ E ) ⊗ V)))
13 brxp 5700 . . . . . 6 (𝑥(V × V)𝐵 ↔ (𝑥 ∈ V ∧ 𝐵 ∈ V))
1411, 3, 13mpbir2an 724 . . . . 5 𝑥(V × V)𝐵
15 epel 5554 . . . . . . 7 (𝑦 E 𝑧 ↔ 𝑦 ∈ 𝑧)
1615rexbii 3109 . . . . . 6 (∃𝑧 ∈ 𝑥 𝑦 E 𝑧 ↔ ∃𝑧 ∈ 𝑥 𝑦 ∈ 𝑧)
17 vex 3454 . . . . . . 7 𝑦 ∈ V
1817, 11coep 36641 . . . . . 6 (𝑦( E ∘ E )𝑥 ↔ ∃𝑧 ∈ 𝑥 𝑦 E 𝑧)
19 eluni2 4870 . . . . . 6 (𝑦 ∈ ∪ 𝑥 ↔ ∃𝑧 ∈ 𝑥 𝑦 ∈ 𝑧)
2016, 18, 193bitr4ri 307 . . . . 5 (𝑦 ∈ ∪ 𝑥 ↔ 𝑦( E ∘ E )𝑥)
2111, 3, 12, 14, 20brtxpsd3 36782 . . . 4 (𝑥 Bigcup 𝐵 ↔ 𝐵 = ∪ 𝑥)
22 eqcom 2767 . . . 4 (𝐵 = ∪ 𝑥 ↔ ∪ 𝑥 = 𝐵)
2321, 22bitri 278 . . 3 (𝑥 Bigcup 𝐵 ↔ ∪ 𝑥 = 𝐵)
248, 10, 23vtoclbg 3519 . 2 (𝐴 ∈ V → (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵))
252, 7, 24pm5.21nii 381 1 (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ↔ wb 209   = wceq 1569   ∈ wcel 2144  ∃wrex 3086  Vcvv 3450  ∪ cuni 4866   class class class wbr 5102   E cep 5550   × cxp 5649   ∘ ccom 5655   Bigcup cbigcup 36720
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-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pow 5327  ax-pr 5391  ax-un 7755
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3897  df-dif 4046  df-in 4090  df-un 4150  df-symdif 4197  df-nul 4278  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5546  df-eprel 5551  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-iota 6497  df-fun 6545  df-fn 6546  df-f 6547  df-fo 6549  df-fv 6551  df-1st 8005  df-2nd 8006  df-txp 36740  df-bigcup 36744
This theorem is used by:  dfbigcup2  36785  fvbigcup  36788  ellimits  36796  brapply  36824  dfrdg4  36839
  Copyright terms: Public domain W3C validator