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Theorem prprvalpw 48415
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 48414 . 2 (𝑉𝑊 → (Pairsproper𝑉) = {𝑝 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
2 prssi 4782 . . . . . . . 8 ((𝑎𝑉𝑏𝑉) → {𝑎, 𝑏} ⊆ 𝑉)
3 eleq1 2848 . . . . . . . . . 10 (𝑝 = {𝑎, 𝑏} → (𝑝 ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ∈ 𝒫 𝑉))
43adantl 487 . . . . . . . . 9 ((𝑎𝑏𝑝 = {𝑎, 𝑏}) → (𝑝 ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ∈ 𝒫 𝑉))
5 prex 5403 . . . . . . . . . 10 {𝑎, 𝑏} ∈ V
65elpw 4561 . . . . . . . . 9 ({𝑎, 𝑏} ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ⊆ 𝑉)
74, 6bitrdi 290 . . . . . . . 8 ((𝑎𝑏𝑝 = {𝑎, 𝑏}) → (𝑝 ∈ 𝒫 𝑉 ↔ {𝑎, 𝑏} ⊆ 𝑉))
82, 7syl5ibrcom 250 . . . . . . 7 ((𝑎𝑉𝑏𝑉) → ((𝑎𝑏𝑝 = {𝑎, 𝑏}) → 𝑝 ∈ 𝒫 𝑉))
98rexlimivv 3204 . . . . . 6 (∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}) → 𝑝 ∈ 𝒫 𝑉)
109pm4.71ri 570 . . . . 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 2826 . . 3 (𝑉𝑊 → {𝑝 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})} = {𝑝 ∣ (𝑝 ∈ 𝒫 𝑉 ∧ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}))})
13 df-rab 3413 . . 3 {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})} = {𝑝 ∣ (𝑝 ∈ 𝒫 𝑉 ∧ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏}))}
1412, 13eqtr4di 2813 . 2 (𝑉𝑊 → {𝑝 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})} = {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
151, 14eqtrd 2795 1 (𝑉𝑊 → (Pairsproper𝑉) = {𝑝 ∈ 𝒫 𝑉 ∣ ∃𝑎𝑉𝑏𝑉 (𝑎𝑏𝑝 = {𝑎, 𝑏})})
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wb 209  wa 401   = wceq 1570  wcel 2145  {cab 2738  wne 2955  wrex 3086  {crab 3412  wss 3899  𝒫 cpw 4557  {cpr 4586  cfv 6533  Pairspropercprpr 48412
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-rep 5232  ax-sep 5251  ax-pr 5398  ax-un 7736
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-iota 6489  df-fun 6535  df-fv 6541  df-prpr 48413
This theorem is used by:  prprelb  48416  prprelprb  48417
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