Theorem gricsym 48045

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 48036	. . 3 ⊢ (𝐺 ≃𝑔𝑟 𝑆 ↔ (𝐺 GraphIso 𝑆) ≠ ∅)
2		n0 4302	. . 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 48012	. . . 4 ⊢ (𝐺 ∈ UHGraph → (𝑓 ∈ (𝐺 GraphIso 𝑆) → ◡𝑓 ∈ (𝑆 GraphIso 𝐺)))
5		brgrici 48037	. . . 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 1934	. 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 1780   ∈ wcel 2113   ≠ wne 2929  ∅c0 4282   class class class wbr 5093  ^◡ccnv 5618  (class class class)co 7352  UHGraphcuhgr 29036   GraphIso cgrim 47999   ≃_𝑔𝑟 cgric 48000

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-sbc 3738  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-iun 4943  df-br 5094  df-opab 5156  df-mpt 5175  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-suc 6317  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-ov 7355  df-oprab 7356  df-mpo 7357  df-1st 7927  df-2nd 7928  df-1o 8391  df-map 8758  df-uhgr 29038  df-grim 48002  df-gric 48005

This theorem is referenced by:  gricsymb  48046  gricer  48048  grlicsym  48137  clnbgr3stgrgrlim  48143  clnbgr3stgrgrlic  48144  usgrexmpl12ngric  48162