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Theorem sprbisymrel 42176
 Description: There is a bijection between the subsets of the set of pairs over a fixed set 𝑉 and the symmetric relations 𝑅 on the fixed set 𝑉. (Contributed by AV, 23-Nov-2021.)
Hypotheses
Ref Expression
sprsymrelf.p 𝑃 = 𝒫 (Pairs‘𝑉)
sprsymrelf.r 𝑅 = {𝑟 ∈ 𝒫 (𝑉 × 𝑉) ∣ ∀𝑥𝑉𝑦𝑉 (𝑥𝑟𝑦𝑦𝑟𝑥)}
Assertion
Ref Expression
sprbisymrel (𝑉𝑊 → ∃𝑓 𝑓:𝑃1-1-onto𝑅)
Distinct variable groups:   𝑥,𝑉,𝑦,𝑟   𝑥,𝑓,𝑦   𝑃,𝑓   𝑅,𝑓   𝑉,𝑟   𝑥,𝑊,𝑦
Allowed substitution hints:   𝑃(𝑥,𝑦,𝑟)   𝑅(𝑥,𝑦,𝑟)   𝑉(𝑓)   𝑊(𝑓,𝑟)

Proof of Theorem sprbisymrel
Dummy variables 𝑝 𝑐 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 sprsymrelf.p . . . 4 𝑃 = 𝒫 (Pairs‘𝑉)
2 fvex 6314 . . . . 5 (Pairs‘𝑉) ∈ V
32pwex 4953 . . . 4 𝒫 (Pairs‘𝑉) ∈ V
41, 3eqeltri 2799 . . 3 𝑃 ∈ V
5 mptexg 6600 . . 3 (𝑃 ∈ V → (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}) ∈ V)
64, 5mp1i 13 . 2 (𝑉𝑊 → (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}) ∈ V)
7 sprsymrelf.r . . 3 𝑅 = {𝑟 ∈ 𝒫 (𝑉 × 𝑉) ∣ ∀𝑥𝑉𝑦𝑉 (𝑥𝑟𝑦𝑦𝑟𝑥)}
8 eqid 2724 . . 3 (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}) = (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}})
91, 7, 8sprsymrelf1o 42175 . 2 (𝑉𝑊 → (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}):𝑃1-1-onto𝑅)
10 f1oeq1 6240 . . 3 (𝑓 = (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}) → (𝑓:𝑃1-1-onto𝑅 ↔ (𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}):𝑃1-1-onto𝑅))
1110spcegv 3398 . 2 ((𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}) ∈ V → ((𝑝𝑃 ↦ {⟨𝑥, 𝑦⟩ ∣ ∃𝑐𝑝 𝑐 = {𝑥, 𝑦}}):𝑃1-1-onto𝑅 → ∃𝑓 𝑓:𝑃1-1-onto𝑅))
126, 9, 11sylc 65 1 (𝑉𝑊 → ∃𝑓 𝑓:𝑃1-1-onto𝑅)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   = wceq 1596  ∃wex 1817   ∈ wcel 2103  ∀wral 3014  ∃wrex 3015  {crab 3018  Vcvv 3304  𝒫 cpw 4266  {cpr 4287   class class class wbr 4760  {copab 4820   ↦ cmpt 4837   × cxp 5216  –1-1-onto→wf1o 6000  ‘cfv 6001  Pairscspr 42154 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1835  ax-4 1850  ax-5 1952  ax-6 2018  ax-7 2054  ax-8 2105  ax-9 2112  ax-10 2132  ax-11 2147  ax-12 2160  ax-13 2355  ax-ext 2704  ax-rep 4879  ax-sep 4889  ax-nul 4897  ax-pow 4948  ax-pr 5011  ax-un 7066 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1599  df-ex 1818  df-nf 1823  df-sb 2011  df-eu 2575  df-mo 2576  df-clab 2711  df-cleq 2717  df-clel 2720  df-nfc 2855  df-ne 2897  df-ral 3019  df-rex 3020  df-reu 3021  df-rab 3023  df-v 3306  df-sbc 3542  df-csb 3640  df-dif 3683  df-un 3685  df-in 3687  df-ss 3694  df-nul 4024  df-if 4195  df-pw 4268  df-sn 4286  df-pr 4288  df-op 4292  df-uni 4545  df-iun 4630  df-br 4761  df-opab 4821  df-mpt 4838  df-id 5128  df-xp 5224  df-rel 5225  df-cnv 5226  df-co 5227  df-dm 5228  df-rn 5229  df-res 5230  df-ima 5231  df-iota 5964  df-fun 6003  df-fn 6004  df-f 6005  df-f1 6006  df-fo 6007  df-f1o 6008  df-fv 6009  df-spr 42155 This theorem is referenced by:  sprsymrelen  42177
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