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Mathbox for Alexander van der Vekens |
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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 46788 | . . . 4 ⊢ Rel IsomGr | |
2 | 1 | brrelex12i 5730 | . . 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 46789 | . . 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 394 = wceq 1539 ∃wex 1779 ∈ wcel 2104 ∀wral 3059 Vcvv 3472 class class class wbr 5147 dom cdm 5675 “ cima 5678 –1-1-onto→wf1o 6541 ‘cfv 6542 Vtxcvtx 28523 iEdgciedg 28524 IsomGr cisomgr 46785 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-ext 2701 ax-sep 5298 ax-nul 5305 ax-pr 5426 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2722 df-clel 2808 df-ral 3060 df-rex 3069 df-rab 3431 df-v 3474 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4322 df-if 4528 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-br 5148 df-opab 5210 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isomgr 46787 |
This theorem is referenced by: (None) |
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