Theorem gricsym 47890

Description: Graph isomorphism is symmetric for hypergraphs. (Contributed by AV, 11-Nov-2022.) (Revised by AV, 3-May-2025.)

Assertion

Ref	Expression
gricsym	⊢ (𝐺 ∈ UHGraph → (𝐺 ≃𝑔𝑟 𝑆 → 𝑆 ≃𝑔𝑟 𝐺))

Proof of Theorem gricsym

Dummy variable 𝑓 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		brgric 47881	. . 3 ⊢ (𝐺 ≃𝑔𝑟 𝑆 ↔ (𝐺 GraphIso 𝑆) ≠ ∅)
2		n0 4353	. . 3 ⊢ ((𝐺 GraphIso 𝑆) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝐺 GraphIso 𝑆))
3	1, 2	bitri 275	. 2 ⊢ (𝐺 ≃𝑔𝑟 𝑆 ↔ ∃𝑓 𝑓 ∈ (𝐺 GraphIso 𝑆))
4		grimcnv 47879	. . . 4 ⊢ (𝐺 ∈ UHGraph → (𝑓 ∈ (𝐺 GraphIso 𝑆) → ◡𝑓 ∈ (𝑆 GraphIso 𝐺)))
5		brgrici 47882	. . . 4 ⊢ (◡𝑓 ∈ (𝑆 GraphIso 𝐺) → 𝑆 ≃𝑔𝑟 𝐺)
6	4, 5	syl6 35	. . 3 ⊢ (𝐺 ∈ UHGraph → (𝑓 ∈ (𝐺 GraphIso 𝑆) → 𝑆 ≃𝑔𝑟 𝐺))
7	6	exlimdv 1933	. 2 ⊢ (𝐺 ∈ UHGraph → (∃𝑓 𝑓 ∈ (𝐺 GraphIso 𝑆) → 𝑆 ≃𝑔𝑟 𝐺))
8	3, 7	biimtrid 242	1 ⊢ (𝐺 ∈ UHGraph → (𝐺 ≃𝑔𝑟 𝑆 → 𝑆 ≃𝑔𝑟 𝐺))

Syntax hints:   → wi 4  ∃wex 1779   ∈ wcel 2108   ≠ wne 2940  ∅c0 4333   class class class wbr 5143  ^◡ccnv 5684  (class class class)co 7431  UHGraphcuhgr 29073   GraphIso cgrim 47861   ≃_𝑔𝑟 cgric 47862

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 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-sep 5296  ax-nul 5306  ax-pow 5365  ax-pr 5432  ax-un 7755

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-sbc 3789  df-csb 3900  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-pw 4602  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-iun 4993  df-br 5144  df-opab 5206  df-mpt 5226  df-id 5578  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-ima 5698  df-suc 6390  df-iota 6514  df-fun 6563  df-fn 6564  df-f 6565  df-f1 6566  df-fo 6567  df-f1o 6568  df-fv 6569  df-ov 7434  df-oprab 7435  df-mpo 7436  df-1st 8014  df-2nd 8015  df-1o 8506  df-map 8868  df-uhgr 29075  df-grim 47864  df-gric 47867

This theorem is referenced by:  gricsymb  47891  gricer  47893  grlicsym  47973  clnbgr3stgrgrlic  47979  usgrexmpl12ngric  47997