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| Mirrors > Home > ILE Home > Th. List > uspgredgiedg | GIF version | ||
| Description: In a simple pseudograph, for each edge there is exactly one indexed edge. (Contributed by AV, 20-Apr-2025.) |
| Ref | Expression |
|---|---|
| uspgredgiedg.e | ⊢ 𝐸 = (Edg‘𝐺) |
| uspgredgiedg.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| Ref | Expression |
|---|---|
| uspgredgiedg | ⊢ ((𝐺 ∈ USPGraph ∧ 𝐾 ∈ 𝐸) → ∃!𝑥 ∈ dom 𝐼 𝐾 = (𝐼‘𝑥)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uspgredgiedg.i | . . . . 5 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 2 | 1 | uspgrf1oedg 16054 | . . . 4 ⊢ (𝐺 ∈ USPGraph → 𝐼:dom 𝐼–1-1-onto→(Edg‘𝐺)) |
| 3 | uspgredgiedg.e | . . . . 5 ⊢ 𝐸 = (Edg‘𝐺) | |
| 4 | f1oeq3 5574 | . . . . 5 ⊢ (𝐸 = (Edg‘𝐺) → (𝐼:dom 𝐼–1-1-onto→𝐸 ↔ 𝐼:dom 𝐼–1-1-onto→(Edg‘𝐺))) | |
| 5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ (𝐼:dom 𝐼–1-1-onto→𝐸 ↔ 𝐼:dom 𝐼–1-1-onto→(Edg‘𝐺)) |
| 6 | 2, 5 | sylibr 134 | . . 3 ⊢ (𝐺 ∈ USPGraph → 𝐼:dom 𝐼–1-1-onto→𝐸) |
| 7 | f1ofveu 6009 | . . 3 ⊢ ((𝐼:dom 𝐼–1-1-onto→𝐸 ∧ 𝐾 ∈ 𝐸) → ∃!𝑥 ∈ dom 𝐼(𝐼‘𝑥) = 𝐾) | |
| 8 | 6, 7 | sylan 283 | . 2 ⊢ ((𝐺 ∈ USPGraph ∧ 𝐾 ∈ 𝐸) → ∃!𝑥 ∈ dom 𝐼(𝐼‘𝑥) = 𝐾) |
| 9 | eqcom 2233 | . . 3 ⊢ (𝐾 = (𝐼‘𝑥) ↔ (𝐼‘𝑥) = 𝐾) | |
| 10 | 9 | reubii 2720 | . 2 ⊢ (∃!𝑥 ∈ dom 𝐼 𝐾 = (𝐼‘𝑥) ↔ ∃!𝑥 ∈ dom 𝐼(𝐼‘𝑥) = 𝐾) |
| 11 | 8, 10 | sylibr 134 | 1 ⊢ ((𝐺 ∈ USPGraph ∧ 𝐾 ∈ 𝐸) → ∃!𝑥 ∈ dom 𝐼 𝐾 = (𝐼‘𝑥)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1397 ∈ wcel 2202 ∃!wreu 2512 dom cdm 4725 –1-1-onto→wf1o 5325 ‘cfv 5326 iEdgciedg 15891 Edgcedg 15935 USPGraphcuspgr 16031 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8126 ax-resscn 8127 ax-1cn 8128 ax-1re 8129 ax-icn 8130 ax-addcl 8131 ax-addrcl 8132 ax-mulcl 8133 ax-addcom 8135 ax-mulcom 8136 ax-addass 8137 ax-mulass 8138 ax-distr 8139 ax-i2m1 8140 ax-1rid 8142 ax-0id 8143 ax-rnegex 8144 ax-cnre 8146 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-riota 5974 df-ov 6024 df-oprab 6025 df-mpo 6026 df-1st 6306 df-2nd 6307 df-sub 8355 df-inn 9147 df-2 9205 df-3 9206 df-4 9207 df-5 9208 df-6 9209 df-7 9210 df-8 9211 df-9 9212 df-n0 9406 df-dec 9615 df-ndx 13106 df-slot 13107 df-base 13109 df-edgf 15883 df-vtx 15892 df-iedg 15893 df-edg 15936 df-uspgren 16033 |
| This theorem is referenced by: (None) |
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