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Theorem tpostpos 7542
Description: Value of the double transposition for a general class 𝐹. (Contributed by Mario Carneiro, 16-Sep-2015.)
Assertion
Ref Expression
tpostpos tpos tpos 𝐹 = (𝐹 ∩ (((V × V) ∪ {∅}) × V))

Proof of Theorem tpostpos
Dummy variables 𝑥 𝑦 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 reltpos 7527 . 2 Rel tpos tpos 𝐹
2 inss2 3977 . . 3 (𝐹 ∩ (((V × V) ∪ {∅}) × V)) ⊆ (((V × V) ∪ {∅}) × V)
3 relxp 5283 . . 3 Rel (((V × V) ∪ {∅}) × V)
4 relss 5363 . . 3 ((𝐹 ∩ (((V × V) ∪ {∅}) × V)) ⊆ (((V × V) ∪ {∅}) × V) → (Rel (((V × V) ∪ {∅}) × V) → Rel (𝐹 ∩ (((V × V) ∪ {∅}) × V))))
52, 3, 4mp2 9 . 2 Rel (𝐹 ∩ (((V × V) ∪ {∅}) × V))
6 relcnv 5661 . . . . . . . . 9 Rel dom tpos 𝐹
7 df-rel 5273 . . . . . . . . 9 (Rel dom tpos 𝐹dom tpos 𝐹 ⊆ (V × V))
86, 7mpbi 220 . . . . . . . 8 dom tpos 𝐹 ⊆ (V × V)
9 simpl 474 . . . . . . . 8 ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) → 𝑤dom tpos 𝐹)
108, 9sseldi 3742 . . . . . . 7 ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) → 𝑤 ∈ (V × V))
11 simpr 479 . . . . . . 7 ((𝑤𝐹𝑧𝑤 ∈ (V × V)) → 𝑤 ∈ (V × V))
12 elvv 5334 . . . . . . . . 9 (𝑤 ∈ (V × V) ↔ ∃𝑥𝑦 𝑤 = ⟨𝑥, 𝑦⟩)
13 eleq1 2827 . . . . . . . . . . . . . 14 (𝑤 = ⟨𝑥, 𝑦⟩ → (𝑤dom tpos 𝐹 ↔ ⟨𝑥, 𝑦⟩ ∈ dom tpos 𝐹))
14 vex 3343 . . . . . . . . . . . . . . 15 𝑥 ∈ V
15 vex 3343 . . . . . . . . . . . . . . 15 𝑦 ∈ V
1614, 15opelcnv 5459 . . . . . . . . . . . . . 14 (⟨𝑥, 𝑦⟩ ∈ dom tpos 𝐹 ↔ ⟨𝑦, 𝑥⟩ ∈ dom tpos 𝐹)
1713, 16syl6bb 276 . . . . . . . . . . . . 13 (𝑤 = ⟨𝑥, 𝑦⟩ → (𝑤dom tpos 𝐹 ↔ ⟨𝑦, 𝑥⟩ ∈ dom tpos 𝐹))
18 sneq 4331 . . . . . . . . . . . . . . . . 17 (𝑤 = ⟨𝑥, 𝑦⟩ → {𝑤} = {⟨𝑥, 𝑦⟩})
1918cnveqd 5453 . . . . . . . . . . . . . . . 16 (𝑤 = ⟨𝑥, 𝑦⟩ → {𝑤} = {⟨𝑥, 𝑦⟩})
2019unieqd 4598 . . . . . . . . . . . . . . 15 (𝑤 = ⟨𝑥, 𝑦⟩ → {𝑤} = {⟨𝑥, 𝑦⟩})
21 opswap 5783 . . . . . . . . . . . . . . 15 {⟨𝑥, 𝑦⟩} = ⟨𝑦, 𝑥
2220, 21syl6eq 2810 . . . . . . . . . . . . . 14 (𝑤 = ⟨𝑥, 𝑦⟩ → {𝑤} = ⟨𝑦, 𝑥⟩)
2322breq1d 4814 . . . . . . . . . . . . 13 (𝑤 = ⟨𝑥, 𝑦⟩ → ( {𝑤}tpos 𝐹𝑧 ↔ ⟨𝑦, 𝑥⟩tpos 𝐹𝑧))
2417, 23anbi12d 749 . . . . . . . . . . . 12 (𝑤 = ⟨𝑥, 𝑦⟩ → ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ (⟨𝑦, 𝑥⟩ ∈ dom tpos 𝐹 ∧ ⟨𝑦, 𝑥⟩tpos 𝐹𝑧)))
25 opex 5081 . . . . . . . . . . . . . . 15 𝑦, 𝑥⟩ ∈ V
26 vex 3343 . . . . . . . . . . . . . . 15 𝑧 ∈ V
2725, 26breldm 5484 . . . . . . . . . . . . . 14 (⟨𝑦, 𝑥⟩tpos 𝐹𝑧 → ⟨𝑦, 𝑥⟩ ∈ dom tpos 𝐹)
2827pm4.71ri 668 . . . . . . . . . . . . 13 (⟨𝑦, 𝑥⟩tpos 𝐹𝑧 ↔ (⟨𝑦, 𝑥⟩ ∈ dom tpos 𝐹 ∧ ⟨𝑦, 𝑥⟩tpos 𝐹𝑧))
29 brtpos 7531 . . . . . . . . . . . . . 14 (𝑧 ∈ V → (⟨𝑦, 𝑥⟩tpos 𝐹𝑧 ↔ ⟨𝑥, 𝑦𝐹𝑧))
3026, 29ax-mp 5 . . . . . . . . . . . . 13 (⟨𝑦, 𝑥⟩tpos 𝐹𝑧 ↔ ⟨𝑥, 𝑦𝐹𝑧)
3128, 30bitr3i 266 . . . . . . . . . . . 12 ((⟨𝑦, 𝑥⟩ ∈ dom tpos 𝐹 ∧ ⟨𝑦, 𝑥⟩tpos 𝐹𝑧) ↔ ⟨𝑥, 𝑦𝐹𝑧)
3224, 31syl6bb 276 . . . . . . . . . . 11 (𝑤 = ⟨𝑥, 𝑦⟩ → ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ ⟨𝑥, 𝑦𝐹𝑧))
33 breq1 4807 . . . . . . . . . . 11 (𝑤 = ⟨𝑥, 𝑦⟩ → (𝑤𝐹𝑧 ↔ ⟨𝑥, 𝑦𝐹𝑧))
3432, 33bitr4d 271 . . . . . . . . . 10 (𝑤 = ⟨𝑥, 𝑦⟩ → ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ 𝑤𝐹𝑧))
3534exlimivv 2009 . . . . . . . . 9 (∃𝑥𝑦 𝑤 = ⟨𝑥, 𝑦⟩ → ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ 𝑤𝐹𝑧))
3612, 35sylbi 207 . . . . . . . 8 (𝑤 ∈ (V × V) → ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ 𝑤𝐹𝑧))
37 iba 525 . . . . . . . 8 (𝑤 ∈ (V × V) → (𝑤𝐹𝑧 ↔ (𝑤𝐹𝑧𝑤 ∈ (V × V))))
3836, 37bitrd 268 . . . . . . 7 (𝑤 ∈ (V × V) → ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ (𝑤𝐹𝑧𝑤 ∈ (V × V))))
3910, 11, 38pm5.21nii 367 . . . . . 6 ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ↔ (𝑤𝐹𝑧𝑤 ∈ (V × V)))
40 elsni 4338 . . . . . . . . . . . . . . . 16 (𝑤 ∈ {∅} → 𝑤 = ∅)
4140sneqd 4333 . . . . . . . . . . . . . . 15 (𝑤 ∈ {∅} → {𝑤} = {∅})
4241cnveqd 5453 . . . . . . . . . . . . . 14 (𝑤 ∈ {∅} → {𝑤} = {∅})
43 cnvsn0 5761 . . . . . . . . . . . . . 14 {∅} = ∅
4442, 43syl6eq 2810 . . . . . . . . . . . . 13 (𝑤 ∈ {∅} → {𝑤} = ∅)
4544unieqd 4598 . . . . . . . . . . . 12 (𝑤 ∈ {∅} → {𝑤} = ∅)
46 uni0 4617 . . . . . . . . . . . 12 ∅ = ∅
4745, 46syl6eq 2810 . . . . . . . . . . 11 (𝑤 ∈ {∅} → {𝑤} = ∅)
4847breq1d 4814 . . . . . . . . . 10 (𝑤 ∈ {∅} → ( {𝑤}tpos 𝐹𝑧 ↔ ∅tpos 𝐹𝑧))
49 brtpos0 7529 . . . . . . . . . . 11 (𝑧 ∈ V → (∅tpos 𝐹𝑧 ↔ ∅𝐹𝑧))
5026, 49ax-mp 5 . . . . . . . . . 10 (∅tpos 𝐹𝑧 ↔ ∅𝐹𝑧)
5148, 50syl6bb 276 . . . . . . . . 9 (𝑤 ∈ {∅} → ( {𝑤}tpos 𝐹𝑧 ↔ ∅𝐹𝑧))
5240breq1d 4814 . . . . . . . . 9 (𝑤 ∈ {∅} → (𝑤𝐹𝑧 ↔ ∅𝐹𝑧))
5351, 52bitr4d 271 . . . . . . . 8 (𝑤 ∈ {∅} → ( {𝑤}tpos 𝐹𝑧𝑤𝐹𝑧))
5453pm5.32i 672 . . . . . . 7 ((𝑤 ∈ {∅} ∧ {𝑤}tpos 𝐹𝑧) ↔ (𝑤 ∈ {∅} ∧ 𝑤𝐹𝑧))
55 ancom 465 . . . . . . 7 ((𝑤 ∈ {∅} ∧ 𝑤𝐹𝑧) ↔ (𝑤𝐹𝑧𝑤 ∈ {∅}))
5654, 55bitri 264 . . . . . 6 ((𝑤 ∈ {∅} ∧ {𝑤}tpos 𝐹𝑧) ↔ (𝑤𝐹𝑧𝑤 ∈ {∅}))
5739, 56orbi12i 544 . . . . 5 (((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ∨ (𝑤 ∈ {∅} ∧ {𝑤}tpos 𝐹𝑧)) ↔ ((𝑤𝐹𝑧𝑤 ∈ (V × V)) ∨ (𝑤𝐹𝑧𝑤 ∈ {∅})))
58 andir 948 . . . . 5 (((𝑤dom tpos 𝐹𝑤 ∈ {∅}) ∧ {𝑤}tpos 𝐹𝑧) ↔ ((𝑤dom tpos 𝐹 {𝑤}tpos 𝐹𝑧) ∨ (𝑤 ∈ {∅} ∧ {𝑤}tpos 𝐹𝑧)))
59 andi 947 . . . . 5 ((𝑤𝐹𝑧 ∧ (𝑤 ∈ (V × V) ∨ 𝑤 ∈ {∅})) ↔ ((𝑤𝐹𝑧𝑤 ∈ (V × V)) ∨ (𝑤𝐹𝑧𝑤 ∈ {∅})))
6057, 58, 593bitr4i 292 . . . 4 (((𝑤dom tpos 𝐹𝑤 ∈ {∅}) ∧ {𝑤}tpos 𝐹𝑧) ↔ (𝑤𝐹𝑧 ∧ (𝑤 ∈ (V × V) ∨ 𝑤 ∈ {∅})))
61 elun 3896 . . . . 5 (𝑤 ∈ (dom tpos 𝐹 ∪ {∅}) ↔ (𝑤dom tpos 𝐹𝑤 ∈ {∅}))
6261anbi1i 733 . . . 4 ((𝑤 ∈ (dom tpos 𝐹 ∪ {∅}) ∧ {𝑤}tpos 𝐹𝑧) ↔ ((𝑤dom tpos 𝐹𝑤 ∈ {∅}) ∧ {𝑤}tpos 𝐹𝑧))
63 brxp 5304 . . . . . . 7 (𝑤(((V × V) ∪ {∅}) × V)𝑧 ↔ (𝑤 ∈ ((V × V) ∪ {∅}) ∧ 𝑧 ∈ V))
6426, 63mpbiran2 992 . . . . . 6 (𝑤(((V × V) ∪ {∅}) × V)𝑧𝑤 ∈ ((V × V) ∪ {∅}))
65 elun 3896 . . . . . 6 (𝑤 ∈ ((V × V) ∪ {∅}) ↔ (𝑤 ∈ (V × V) ∨ 𝑤 ∈ {∅}))
6664, 65bitri 264 . . . . 5 (𝑤(((V × V) ∪ {∅}) × V)𝑧 ↔ (𝑤 ∈ (V × V) ∨ 𝑤 ∈ {∅}))
6766anbi2i 732 . . . 4 ((𝑤𝐹𝑧𝑤(((V × V) ∪ {∅}) × V)𝑧) ↔ (𝑤𝐹𝑧 ∧ (𝑤 ∈ (V × V) ∨ 𝑤 ∈ {∅})))
6860, 62, 673bitr4i 292 . . 3 ((𝑤 ∈ (dom tpos 𝐹 ∪ {∅}) ∧ {𝑤}tpos 𝐹𝑧) ↔ (𝑤𝐹𝑧𝑤(((V × V) ∪ {∅}) × V)𝑧))
69 brtpos2 7528 . . . 4 (𝑧 ∈ V → (𝑤tpos tpos 𝐹𝑧 ↔ (𝑤 ∈ (dom tpos 𝐹 ∪ {∅}) ∧ {𝑤}tpos 𝐹𝑧)))
7026, 69ax-mp 5 . . 3 (𝑤tpos tpos 𝐹𝑧 ↔ (𝑤 ∈ (dom tpos 𝐹 ∪ {∅}) ∧ {𝑤}tpos 𝐹𝑧))
71 brin 4856 . . 3 (𝑤(𝐹 ∩ (((V × V) ∪ {∅}) × V))𝑧 ↔ (𝑤𝐹𝑧𝑤(((V × V) ∪ {∅}) × V)𝑧))
7268, 70, 713bitr4i 292 . 2 (𝑤tpos tpos 𝐹𝑧𝑤(𝐹 ∩ (((V × V) ∪ {∅}) × V))𝑧)
731, 5, 72eqbrriv 5372 1 tpos tpos 𝐹 = (𝐹 ∩ (((V × V) ∪ {∅}) × V))
Colors of variables: wff setvar class
Syntax hints:  wb 196  wo 382  wa 383   = wceq 1632  wex 1853  wcel 2139  Vcvv 3340  cun 3713  cin 3714  wss 3715  c0 4058  {csn 4321  cop 4327   cuni 4588   class class class wbr 4804   × cxp 5264  ccnv 5265  dom cdm 5266  Rel wrel 5271  tpos ctpos 7521
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7115
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-sbc 3577  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-iota 6012  df-fun 6051  df-fn 6052  df-fv 6057  df-tpos 7522
This theorem is referenced by:  tpostpos2  7543
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