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Mirrors > Home > MPE Home > Th. List > Mathboxes > isisomgr | Structured version Visualization version GIF version |
Description: Implications of two graphs being isomorphic. (Contributed by AV, 11-Nov-2022.) |
Ref | Expression |
---|---|
isomgr.v | ⊢ 𝑉 = (Vtx‘𝐴) |
isomgr.w | ⊢ 𝑊 = (Vtx‘𝐵) |
isomgr.i | ⊢ 𝐼 = (iEdg‘𝐴) |
isomgr.j | ⊢ 𝐽 = (iEdg‘𝐵) |
Ref | Expression |
---|---|
isisomgr | ⊢ (𝐴 IsomGr 𝐵 → ∃𝑓(𝑓:𝑉–1-1-onto→𝑊 ∧ ∃𝑔(𝑔:dom 𝐼–1-1-onto→dom 𝐽 ∧ ∀𝑖 ∈ dom 𝐼(𝑓 “ (𝐼‘𝑖)) = (𝐽‘(𝑔‘𝑖))))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isomgrrel 45274 | . . . 4 ⊢ Rel IsomGr | |
2 | 1 | brrelex12i 5642 | . . 3 ⊢ (𝐴 IsomGr 𝐵 → (𝐴 ∈ V ∧ 𝐵 ∈ V)) |
3 | isomgr.v | . . . 4 ⊢ 𝑉 = (Vtx‘𝐴) | |
4 | isomgr.w | . . . 4 ⊢ 𝑊 = (Vtx‘𝐵) | |
5 | isomgr.i | . . . 4 ⊢ 𝐼 = (iEdg‘𝐴) | |
6 | isomgr.j | . . . 4 ⊢ 𝐽 = (iEdg‘𝐵) | |
7 | 3, 4, 5, 6 | isomgr 45275 | . . 3 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 IsomGr 𝐵 ↔ ∃𝑓(𝑓:𝑉–1-1-onto→𝑊 ∧ ∃𝑔(𝑔:dom 𝐼–1-1-onto→dom 𝐽 ∧ ∀𝑖 ∈ dom 𝐼(𝑓 “ (𝐼‘𝑖)) = (𝐽‘(𝑔‘𝑖)))))) |
8 | 2, 7 | syl 17 | . 2 ⊢ (𝐴 IsomGr 𝐵 → (𝐴 IsomGr 𝐵 ↔ ∃𝑓(𝑓:𝑉–1-1-onto→𝑊 ∧ ∃𝑔(𝑔:dom 𝐼–1-1-onto→dom 𝐽 ∧ ∀𝑖 ∈ dom 𝐼(𝑓 “ (𝐼‘𝑖)) = (𝐽‘(𝑔‘𝑖)))))) |
9 | 8 | ibi 266 | 1 ⊢ (𝐴 IsomGr 𝐵 → ∃𝑓(𝑓:𝑉–1-1-onto→𝑊 ∧ ∃𝑔(𝑔:dom 𝐼–1-1-onto→dom 𝐽 ∧ ∀𝑖 ∈ dom 𝐼(𝑓 “ (𝐼‘𝑖)) = (𝐽‘(𝑔‘𝑖))))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∃wex 1782 ∈ wcel 2106 ∀wral 3064 Vcvv 3432 class class class wbr 5074 dom cdm 5589 “ cima 5592 –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 ax-sep 5223 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-sb 2068 df-clab 2716 df-cleq 2730 df-clel 2816 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isomgr 45273 |
This theorem is referenced by: (None) |
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