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| Mirrors > Home > ILE Home > Th. List > uspgriedgedg | GIF version | ||
| Description: In a simple pseudograph, for each indexed edge there is exactly one edge. (Contributed by AV, 20-Apr-2025.) |
| Ref | Expression |
|---|---|
| uspgredgiedg.e | ⊢ 𝐸 = (Edg‘𝐺) |
| uspgredgiedg.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| Ref | Expression |
|---|---|
| uspgriedgedg | ⊢ ((𝐺 ∈ USPGraph ∧ 𝑋 ∈ dom 𝐼) → ∃!𝑘 ∈ 𝐸 𝑘 = (𝐼‘𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uspgredgiedg.i | . . . . . 6 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 2 | 1 | uspgrf1oedg 15990 | . . . . 5 ⊢ (𝐺 ∈ USPGraph → 𝐼:dom 𝐼–1-1-onto→(Edg‘𝐺)) |
| 3 | f1of 5574 | . . . . 5 ⊢ (𝐼:dom 𝐼–1-1-onto→(Edg‘𝐺) → 𝐼:dom 𝐼⟶(Edg‘𝐺)) | |
| 4 | 2, 3 | syl 14 | . . . 4 ⊢ (𝐺 ∈ USPGraph → 𝐼:dom 𝐼⟶(Edg‘𝐺)) |
| 5 | uspgredgiedg.e | . . . . 5 ⊢ 𝐸 = (Edg‘𝐺) | |
| 6 | feq3 5458 | . . . . 5 ⊢ (𝐸 = (Edg‘𝐺) → (𝐼:dom 𝐼⟶𝐸 ↔ 𝐼:dom 𝐼⟶(Edg‘𝐺))) | |
| 7 | 5, 6 | ax-mp 5 | . . . 4 ⊢ (𝐼:dom 𝐼⟶𝐸 ↔ 𝐼:dom 𝐼⟶(Edg‘𝐺)) |
| 8 | 4, 7 | sylibr 134 | . . 3 ⊢ (𝐺 ∈ USPGraph → 𝐼:dom 𝐼⟶𝐸) |
| 9 | fdmeu 5679 | . . 3 ⊢ ((𝐼:dom 𝐼⟶𝐸 ∧ 𝑋 ∈ dom 𝐼) → ∃!𝑘 ∈ 𝐸 (𝐼‘𝑋) = 𝑘) | |
| 10 | 8, 9 | sylan 283 | . 2 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑋 ∈ dom 𝐼) → ∃!𝑘 ∈ 𝐸 (𝐼‘𝑋) = 𝑘) |
| 11 | eqcom 2231 | . . 3 ⊢ (𝑘 = (𝐼‘𝑋) ↔ (𝐼‘𝑋) = 𝑘) | |
| 12 | 11 | reubii 2718 | . 2 ⊢ (∃!𝑘 ∈ 𝐸 𝑘 = (𝐼‘𝑋) ↔ ∃!𝑘 ∈ 𝐸 (𝐼‘𝑋) = 𝑘) |
| 13 | 10, 12 | sylibr 134 | 1 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑋 ∈ dom 𝐼) → ∃!𝑘 ∈ 𝐸 𝑘 = (𝐼‘𝑋)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1395 ∈ wcel 2200 ∃!wreu 2510 dom cdm 4719 ⟶wf 5314 –1-1-onto→wf1o 5317 ‘cfv 5318 iEdgciedg 15830 Edgcedg 15874 USPGraphcuspgr 15967 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-addcom 8110 ax-mulcom 8111 ax-addass 8112 ax-mulass 8113 ax-distr 8114 ax-i2m1 8115 ax-1rid 8117 ax-0id 8118 ax-rnegex 8119 ax-cnre 8121 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-if 3603 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-f1 5323 df-fo 5324 df-f1o 5325 df-fv 5326 df-riota 5960 df-ov 6010 df-oprab 6011 df-mpo 6012 df-1st 6292 df-2nd 6293 df-sub 8330 df-inn 9122 df-2 9180 df-3 9181 df-4 9182 df-5 9183 df-6 9184 df-7 9185 df-8 9186 df-9 9187 df-n0 9381 df-dec 9590 df-ndx 13051 df-slot 13052 df-base 13054 df-edgf 15822 df-vtx 15831 df-iedg 15832 df-edg 15875 df-uspgren 15969 |
| This theorem is referenced by: (None) |
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