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| Mirrors > Home > MPE Home > Th. List > usgr1e | Structured version Visualization version 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 | 1, 2, 3, 4, 5 | uspgr1e 29535 | . 2 ⊢ (𝜑 → 𝐺 ∈ USPGraph) |
| 7 | usgr1e.e | . . . . 5 ⊢ (𝜑 → 𝐵 ≠ 𝐶) | |
| 8 | hashprg 14431 | . . . . . 6 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝐵 ≠ 𝐶 ↔ (♯‘{𝐵, 𝐶}) = 2)) | |
| 9 | 3, 4, 8 | syl2anc 595 | . . . . 5 ⊢ (𝜑 → (𝐵 ≠ 𝐶 ↔ (♯‘{𝐵, 𝐶}) = 2)) |
| 10 | 7, 9 | mpbid 235 | . . . 4 ⊢ (𝜑 → (♯‘{𝐵, 𝐶}) = 2) |
| 11 | prex 5410 | . . . . 5 ⊢ {𝐵, 𝐶} ∈ V | |
| 12 | fveqeq2 6891 | . . . . 5 ⊢ (𝑥 = {𝐵, 𝐶} → ((♯‘𝑥) = 2 ↔ (♯‘{𝐵, 𝐶}) = 2)) | |
| 13 | 11, 12 | ralsn 4652 | . . . 4 ⊢ (∀𝑥 ∈ {{𝐵, 𝐶}} (♯‘𝑥) = 2 ↔ (♯‘{𝐵, 𝐶}) = 2) |
| 14 | 10, 13 | sylibr 237 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ {{𝐵, 𝐶}} (♯‘𝑥) = 2) |
| 15 | edgval 29340 | . . . . 5 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺) | |
| 16 | 15 | a1i 11 | . . . 4 ⊢ (𝜑 → (Edg‘𝐺) = ran (iEdg‘𝐺)) |
| 17 | 5 | rneqd 5929 | . . . 4 ⊢ (𝜑 → ran (iEdg‘𝐺) = ran {〈𝐴, {𝐵, 𝐶}〉}) |
| 18 | rnsnopg 6223 | . . . . 5 ⊢ (𝐴 ∈ 𝑋 → ran {〈𝐴, {𝐵, 𝐶}〉} = {{𝐵, 𝐶}}) | |
| 19 | 2, 18 | syl 18 | . . . 4 ⊢ (𝜑 → ran {〈𝐴, {𝐵, 𝐶}〉} = {{𝐵, 𝐶}}) |
| 20 | 16, 17, 19 | 3eqtrd 2808 | . . 3 ⊢ (𝜑 → (Edg‘𝐺) = {{𝐵, 𝐶}}) |
| 21 | 14, 20 | raleqtrrdv 3333 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (Edg‘𝐺)(♯‘𝑥) = 2) |
| 22 | usgruspgrb 29474 | . 2 ⊢ (𝐺 ∈ USGraph ↔ (𝐺 ∈ USPGraph ∧ ∀𝑥 ∈ (Edg‘𝐺)(♯‘𝑥) = 2)) | |
| 23 | 6, 21, 22 | sylanbrc 594 | 1 ⊢ (𝜑 → 𝐺 ∈ USGraph) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 = wceq 1567 ∈ wcel 2149 ≠ wne 2964 ∀wral 3085 {csn 4594 {cpr 4596 〈cop 4600 ran crn 5663 ‘cfv 6537 2c2 12295 ♯chash 14366 Vtxcvtx 29287 iEdgciedg 29288 Edgcedg 29338 USPGraphcuspgr 29439 USGraphcusgr 29440 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11156 ax-resscn 11157 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-addrcl 11161 ax-mulcl 11162 ax-mulrcl 11163 ax-mulcom 11164 ax-addass 11165 ax-mulass 11166 ax-distr 11167 ax-i2m1 11168 ax-1ne0 11169 ax-1rid 11170 ax-rnegex 11171 ax-rrecex 11172 ax-cnre 11173 ax-pre-lttri 11174 ax-pre-lttrn 11175 ax-pre-ltadd 11176 ax-pre-mulgt0 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-1o 8453 df-oadd 8457 df-er 8694 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-dju 9887 df-card 9925 df-pnf 11245 df-mnf 11246 df-xr 11247 df-ltxr 11248 df-le 11249 df-sub 11443 df-neg 11444 df-nn 12234 df-2 12303 df-n0 12505 df-xnn0 12578 df-z 12592 df-uz 12863 df-fz 13536 df-hash 14367 df-edg 29339 df-uspgr 29441 df-usgr 29442 |
| This theorem is referenced by: usgr1eop 29541 1egrvtxdg1 29800 1egrvtxdg0 29802 |
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