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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 742 | . . . 4 ⊢ (𝜑 → (𝐵 = 𝐶 ∨ 𝐵 ≠ 𝐶)) |
| 8 | dcne 2423 | . . . 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 16222 | . 2 ⊢ (𝜑 → 𝐺 ∈ USPGraph) |
| 11 | pr2ne 7488 | . . . . . 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 4324 | . . . . . 6 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → {𝐵, 𝐶} ∈ V) | |
| 15 | 3, 4, 14 | syl2anc 411 | . . . . 5 ⊢ (𝜑 → {𝐵, 𝐶} ∈ V) |
| 16 | breq1 4111 | . . . . . 6 ⊢ (𝑥 = {𝐵, 𝐶} → (𝑥 ≈ 2o ↔ {𝐵, 𝐶} ≈ 2o)) | |
| 17 | 16 | ralsng 3728 | . . . . 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 16041 | . . . . 5 ⊢ (𝐺 ∈ USPGraph → (Edg‘𝐺) = ran (iEdg‘𝐺)) | |
| 21 | 10, 20 | syl 14 | . . . 4 ⊢ (𝜑 → (Edg‘𝐺) = ran (iEdg‘𝐺)) |
| 22 | 5 | rneqd 4985 | . . . 4 ⊢ (𝜑 → ran (iEdg‘𝐺) = ran {〈𝐴, {𝐵, 𝐶}〉}) |
| 23 | rnsnopg 5240 | . . . . 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 2269 | . . 3 ⊢ (𝜑 → (Edg‘𝐺) = {{𝐵, 𝐶}}) |
| 26 | 19, 25 | raleqtrrdv 2750 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (Edg‘𝐺)𝑥 ≈ 2o) |
| 27 | usgruspgrben 16168 | . 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 716 DECID wdc 842 = wceq 1398 ∈ wcel 2203 ≠ wne 2412 ∀wral 2520 Vcvv 2812 {csn 3688 {cpr 3689 〈cop 3691 class class class wbr 4108 ran crn 4749 ‘cfv 5351 2oc2o 6640 ≈ cen 6972 Vtxcvtx 15994 iEdgciedg 15995 Edgcedg 16039 USPGraphcuspgr 16135 USGraphcusgr 16136 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-nul 4235 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-iinf 4709 ax-cnex 8214 ax-resscn 8215 ax-1cn 8216 ax-1re 8217 ax-icn 8218 ax-addcl 8219 ax-addrcl 8220 ax-mulcl 8221 ax-addcom 8223 ax-mulcom 8224 ax-addass 8225 ax-mulass 8226 ax-distr 8227 ax-i2m1 8228 ax-1rid 8230 ax-0id 8231 ax-rnegex 8232 ax-cnre 8234 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-if 3620 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-br 4109 df-opab 4171 df-mpt 4172 df-tr 4208 df-id 4413 df-iord 4486 df-on 4488 df-suc 4491 df-iom 4712 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-1st 6333 df-2nd 6334 df-1o 6646 df-2o 6647 df-er 6766 df-en 6975 df-sub 8442 df-inn 9234 df-2 9292 df-3 9293 df-4 9294 df-5 9295 df-6 9296 df-7 9297 df-8 9298 df-9 9299 df-n0 9493 df-dec 9706 df-ndx 13204 df-slot 13205 df-base 13207 df-edgf 15987 df-vtx 15996 df-iedg 15997 df-edg 16040 df-uspgren 16137 df-usgren 16138 |
| This theorem is referenced by: usgr1eop 16227 |
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