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Theorem prprvalpw 43751
Description: The set of all proper unordered pairs over a given set 𝑉, expressed by a restricted class abstraction. (Contributed by AV, 29-Apr-2023.)
Assertion
Ref Expression
prprvalpw (𝑉𝑊 → (Pairsproper𝑉) = {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
Distinct variable groups:   𝑉,𝑎,𝑏,𝑝   𝑊,𝑎,𝑏,𝑝

Proof of Theorem prprvalpw
StepHypRef Expression
1 prprval 43750 . 2 (𝑉𝑊 → (Pairsproper𝑉) = {𝑝 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
2 prssi 4751 . . . . . . . 8 ((𝑎𝑉𝑏𝑉) → {𝑎, 𝑏} ⊆ 𝑉)
3 eleq1 2899 . . . . . . . . . 10 (𝑝 = {𝑎, 𝑏} → (𝑝 ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ∈ 𝒫 𝑉))
43adantl 484 . . . . . . . . 9 ((𝑎𝑏𝑝 = {𝑎, 𝑏}) → (𝑝 ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ∈ 𝒫 𝑉))
5 prex 5330 . . . . . . . . . 10 {𝑎, 𝑏} ∈ V
65elpw 4540 . . . . . . . . 9 ({𝑎, 𝑏} ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ⊆ 𝑉)
74, 6syl6bb 289 . . . . . . . 8 ((𝑎𝑏𝑝 = {𝑎, 𝑏}) → (𝑝 ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ⊆ 𝑉))
82, 7syl5ibrcom 249 . . . . . . 7 ((𝑎𝑉𝑏𝑉) → ((𝑎𝑏𝑝 = {𝑎, 𝑏}) → 𝑝 ∈ 𝒫 𝑉))
98rexlimivv 3291 . . . . . 6 (∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}) → 𝑝 ∈ 𝒫 𝑉)
109pm4.71ri 563 . . . . 5 (∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}) ↔ (𝑝 ∈ 𝒫 𝑉 ∧ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})))
1110a1i 11 . . . 4 (𝑉𝑊 → (∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}) ↔ (𝑝 ∈ 𝒫 𝑉 ∧ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}))))
1211abbidv 2884 . . 3 (𝑉𝑊 → {𝑝 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})} = {𝑝 ∣ (𝑝 ∈ 𝒫 𝑉 ∧ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}))})
13 df-rab 3146 . . 3 {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})} = {𝑝 ∣ (𝑝 ∈ 𝒫 𝑉 ∧ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}))}
1412, 13syl6eqr 2873 . 2 (𝑉𝑊 → {𝑝 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})} = {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
151, 14eqtrd 2855 1 (𝑉𝑊 → (Pairsproper𝑉) = {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208  wa 398   = wceq 1536  wcel 2113  {cab 2798  wne 3015  wrex 3138  {crab 3141  wss 3933  𝒫 cpw 4536  {cpr 4566  cfv 6352  Pairspropercprpr 43748
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2792  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pr 5327  ax-un 7458
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1084  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2892  df-nfc 2962  df-ne 3016  df-ral 3142  df-rex 3143  df-reu 3144  df-rab 3146  df-v 3495  df-sbc 3771  df-csb 3881  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-nul 4289  df-if 4465  df-pw 4538  df-sn 4565  df-pr 4567  df-op 4571  df-uni 4836  df-iun 4918  df-br 5064  df-opab 5126  df-mpt 5144  df-id 5457  df-xp 5558  df-rel 5559  df-cnv 5560  df-co 5561  df-dm 5562  df-rn 5563  df-res 5564  df-ima 5565  df-iota 6311  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-prpr 43749
This theorem is referenced by:  prprelb  43752  prprelprb  43753
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