Theorem isomgrrel 45274

Description: The isomorphy relation for graphs is a relation. (Contributed by AV, 11-Nov-2022.)

Assertion

Ref	Expression
isomgrrel	⊢ Rel IsomGr

Proof of Theorem isomgrrel

Dummy variables 𝑓 𝑔 𝑖 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-isomgr 45273	. 2 ⊢ IsomGr = {⟨𝑥, 𝑦⟩ ∣ ∃𝑓(𝑓:(Vtx‘𝑥)–1-1-onto→(Vtx‘𝑦) ∧ ∃𝑔(𝑔:dom (iEdg‘𝑥)–1-1-onto→dom (iEdg‘𝑦) ∧ ∀𝑖 ∈ dom (iEdg‘𝑥)(𝑓 “ ((iEdg‘𝑥)‘𝑖)) = ((iEdg‘𝑦)‘(𝑔‘𝑖))))}
2	1	relopabiv 5730	1 ⊢ Rel IsomGr

Syntax hints:   ∧ wa 396   = wceq 1539  ∃wex 1782  ∀wral 3064  dom cdm 5589   “ cima 5592  Rel wrel 5594  –1-1-onto→wf1o 6432  ‘cfv 6433  Vtxcvtx 27366  iEdgciedg 27367   IsomGr cisomgr 45271

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709

This theorem depends on definitions:  df-bi 206  df-an 397  df-tru 1542  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-v 3434  df-in 3894  df-ss 3904  df-opab 5137  df-xp 5595  df-rel 5596  df-isomgr 45273

This theorem is referenced by:  isisomgr  45276