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| Mirrors > Home > ILE Home > Th. List > usgr1e | GIF version | ||
| Description: A simple graph with one edge (with additional assumption that 𝐵 ≠ 𝐶 since otherwise the edge is a loop!). (Contributed by Alexander van der Vekens, 10-Aug-2017.) (Revised by AV, 18-Oct-2020.) |
| Ref | Expression |
|---|---|
| uspgr1e.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| uspgr1e.a | ⊢ (𝜑 → 𝐴 ∈ 𝑋) |
| uspgr1e.b | ⊢ (𝜑 → 𝐵 ∈ 𝑉) |
| uspgr1e.c | ⊢ (𝜑 → 𝐶 ∈ 𝑉) |
| uspgr1e.e | ⊢ (𝜑 → (iEdg‘𝐺) = {〈𝐴, {𝐵, 𝐶}〉}) |
| usgr1e.e | ⊢ (𝜑 → 𝐵 ≠ 𝐶) |
| Ref | Expression |
|---|---|
| usgr1e | ⊢ (𝜑 → 𝐺 ∈ USGraph) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uspgr1e.v | . . 3 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 2 | uspgr1e.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑋) | |
| 3 | uspgr1e.b | . . 3 ⊢ (𝜑 → 𝐵 ∈ 𝑉) | |
| 4 | uspgr1e.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ 𝑉) | |
| 5 | uspgr1e.e | . . 3 ⊢ (𝜑 → (iEdg‘𝐺) = {〈𝐴, {𝐵, 𝐶}〉}) | |
| 6 | usgr1e.e | . . . . 5 ⊢ (𝜑 → 𝐵 ≠ 𝐶) | |
| 7 | 6 | olcd 741 | . . . 4 ⊢ (𝜑 → (𝐵 = 𝐶 ∨ 𝐵 ≠ 𝐶)) |
| 8 | dcne 2413 | . . . 4 ⊢ (DECID 𝐵 = 𝐶 ↔ (𝐵 = 𝐶 ∨ 𝐵 ≠ 𝐶)) | |
| 9 | 7, 8 | sylibr 134 | . . 3 ⊢ (𝜑 → DECID 𝐵 = 𝐶) |
| 10 | 1, 2, 3, 4, 5, 9 | uspgr1edc 16094 | . 2 ⊢ (𝜑 → 𝐺 ∈ USPGraph) |
| 11 | pr2ne 7397 | . . . . . 6 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → ({𝐵, 𝐶} ≈ 2o ↔ 𝐵 ≠ 𝐶)) | |
| 12 | 3, 4, 11 | syl2anc 411 | . . . . 5 ⊢ (𝜑 → ({𝐵, 𝐶} ≈ 2o ↔ 𝐵 ≠ 𝐶)) |
| 13 | 6, 12 | mpbird 167 | . . . 4 ⊢ (𝜑 → {𝐵, 𝐶} ≈ 2o) |
| 14 | prexg 4301 | . . . . . 6 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → {𝐵, 𝐶} ∈ V) | |
| 15 | 3, 4, 14 | syl2anc 411 | . . . . 5 ⊢ (𝜑 → {𝐵, 𝐶} ∈ V) |
| 16 | breq1 4091 | . . . . . 6 ⊢ (𝑥 = {𝐵, 𝐶} → (𝑥 ≈ 2o ↔ {𝐵, 𝐶} ≈ 2o)) | |
| 17 | 16 | ralsng 3709 | . . . . 5 ⊢ ({𝐵, 𝐶} ∈ V → (∀𝑥 ∈ {{𝐵, 𝐶}}𝑥 ≈ 2o ↔ {𝐵, 𝐶} ≈ 2o)) |
| 18 | 15, 17 | syl 14 | . . . 4 ⊢ (𝜑 → (∀𝑥 ∈ {{𝐵, 𝐶}}𝑥 ≈ 2o ↔ {𝐵, 𝐶} ≈ 2o)) |
| 19 | 13, 18 | mpbird 167 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ {{𝐵, 𝐶}}𝑥 ≈ 2o) |
| 20 | edgvalg 15913 | . . . . 5 ⊢ (𝐺 ∈ USPGraph → (Edg‘𝐺) = ran (iEdg‘𝐺)) | |
| 21 | 10, 20 | syl 14 | . . . 4 ⊢ (𝜑 → (Edg‘𝐺) = ran (iEdg‘𝐺)) |
| 22 | 5 | rneqd 4961 | . . . 4 ⊢ (𝜑 → ran (iEdg‘𝐺) = ran {〈𝐴, {𝐵, 𝐶}〉}) |
| 23 | rnsnopg 5215 | . . . . 5 ⊢ (𝐴 ∈ 𝑋 → ran {〈𝐴, {𝐵, 𝐶}〉} = {{𝐵, 𝐶}}) | |
| 24 | 2, 23 | syl 14 | . . . 4 ⊢ (𝜑 → ran {〈𝐴, {𝐵, 𝐶}〉} = {{𝐵, 𝐶}}) |
| 25 | 21, 22, 24 | 3eqtrd 2268 | . . 3 ⊢ (𝜑 → (Edg‘𝐺) = {{𝐵, 𝐶}}) |
| 26 | 19, 25 | raleqtrrdv 2740 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (Edg‘𝐺)𝑥 ≈ 2o) |
| 27 | usgruspgrben 16040 | . 2 ⊢ (𝐺 ∈ USGraph ↔ (𝐺 ∈ USPGraph ∧ ∀𝑥 ∈ (Edg‘𝐺)𝑥 ≈ 2o)) | |
| 28 | 10, 26, 27 | sylanbrc 417 | 1 ⊢ (𝜑 → 𝐺 ∈ USGraph) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 ∨ wo 715 DECID wdc 841 = wceq 1397 ∈ wcel 2202 ≠ wne 2402 ∀wral 2510 Vcvv 2802 {csn 3669 {cpr 3670 〈cop 3672 class class class wbr 4088 ran crn 4726 ‘cfv 5326 2oc2o 6576 ≈ cen 6907 Vtxcvtx 15866 iEdgciedg 15867 Edgcedg 15911 USPGraphcuspgr 16007 USGraphcusgr 16008 |
| 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-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-iinf 4686 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-addcom 8132 ax-mulcom 8133 ax-addass 8134 ax-mulass 8135 ax-distr 8136 ax-i2m1 8137 ax-1rid 8139 ax-0id 8140 ax-rnegex 8141 ax-cnre 8143 |
| This theorem depends on definitions: df-bi 117 df-dc 842 df-3or 1005 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-nul 3495 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-tr 4188 df-id 4390 df-iord 4463 df-on 4465 df-suc 4468 df-iom 4689 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 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-1st 6303 df-2nd 6304 df-1o 6582 df-2o 6583 df-er 6702 df-en 6910 df-sub 8352 df-inn 9144 df-2 9202 df-3 9203 df-4 9204 df-5 9205 df-6 9206 df-7 9207 df-8 9208 df-9 9209 df-n0 9403 df-dec 9612 df-ndx 13087 df-slot 13088 df-base 13090 df-edgf 15859 df-vtx 15868 df-iedg 15869 df-edg 15912 df-uspgren 16009 df-usgren 16010 |
| This theorem is referenced by: usgr1eop 16099 |
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