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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 29331 | . 2 ⊢ (𝜑 → 𝐺 ∈ USPGraph) |
| 7 | usgr1e.e | . . . . 5 ⊢ (𝜑 → 𝐵 ≠ 𝐶) | |
| 8 | hashprg 14352 | . . . . . 6 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉) → (𝐵 ≠ 𝐶 ↔ (♯‘{𝐵, 𝐶}) = 2)) | |
| 9 | 3, 4, 8 | syl2anc 585 | . . . . 5 ⊢ (𝜑 → (𝐵 ≠ 𝐶 ↔ (♯‘{𝐵, 𝐶}) = 2)) |
| 10 | 7, 9 | mpbid 232 | . . . 4 ⊢ (𝜑 → (♯‘{𝐵, 𝐶}) = 2) |
| 11 | prex 5377 | . . . . 5 ⊢ {𝐵, 𝐶} ∈ V | |
| 12 | fveqeq2 6845 | . . . . 5 ⊢ (𝑥 = {𝐵, 𝐶} → ((♯‘𝑥) = 2 ↔ (♯‘{𝐵, 𝐶}) = 2)) | |
| 13 | 11, 12 | ralsn 4626 | . . . 4 ⊢ (∀𝑥 ∈ {{𝐵, 𝐶}} (♯‘𝑥) = 2 ↔ (♯‘{𝐵, 𝐶}) = 2) |
| 14 | 10, 13 | sylibr 234 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ {{𝐵, 𝐶}} (♯‘𝑥) = 2) |
| 15 | edgval 29136 | . . . . 5 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺) | |
| 16 | 15 | a1i 11 | . . . 4 ⊢ (𝜑 → (Edg‘𝐺) = ran (iEdg‘𝐺)) |
| 17 | 5 | rneqd 5889 | . . . 4 ⊢ (𝜑 → ran (iEdg‘𝐺) = ran {〈𝐴, {𝐵, 𝐶}〉}) |
| 18 | rnsnopg 6181 | . . . . 5 ⊢ (𝐴 ∈ 𝑋 → ran {〈𝐴, {𝐵, 𝐶}〉} = {{𝐵, 𝐶}}) | |
| 19 | 2, 18 | syl 17 | . . . 4 ⊢ (𝜑 → ran {〈𝐴, {𝐵, 𝐶}〉} = {{𝐵, 𝐶}}) |
| 20 | 16, 17, 19 | 3eqtrd 2776 | . . 3 ⊢ (𝜑 → (Edg‘𝐺) = {{𝐵, 𝐶}}) |
| 21 | 14, 20 | raleqtrrdv 3300 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (Edg‘𝐺)(♯‘𝑥) = 2) |
| 22 | usgruspgrb 29270 | . 2 ⊢ (𝐺 ∈ USGraph ↔ (𝐺 ∈ USPGraph ∧ ∀𝑥 ∈ (Edg‘𝐺)(♯‘𝑥) = 2)) | |
| 23 | 6, 21, 22 | sylanbrc 584 | 1 ⊢ (𝜑 → 𝐺 ∈ USGraph) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∀wral 3052 {csn 4568 {cpr 4570 〈cop 4574 ran crn 5627 ‘cfv 6494 2c2 12231 ♯chash 14287 Vtxcvtx 29083 iEdgciedg 29084 Edgcedg 29134 USPGraphcuspgr 29235 USGraphcusgr 29236 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5304 ax-pr 5372 ax-un 7684 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5521 df-eprel 5526 df-po 5534 df-so 5535 df-fr 5579 df-we 5581 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-rn 5637 df-res 5638 df-ima 5639 df-pred 6261 df-ord 6322 df-on 6323 df-lim 6324 df-suc 6325 df-iota 6450 df-fun 6496 df-fn 6497 df-f 6498 df-f1 6499 df-fo 6500 df-f1o 6501 df-fv 6502 df-riota 7319 df-ov 7365 df-oprab 7366 df-mpo 7367 df-om 7813 df-1st 7937 df-2nd 7938 df-frecs 8226 df-wrecs 8257 df-recs 8306 df-rdg 8344 df-1o 8400 df-oadd 8404 df-er 8638 df-en 8889 df-dom 8890 df-sdom 8891 df-fin 8892 df-dju 9820 df-card 9858 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-nn 12170 df-2 12239 df-n0 12433 df-xnn0 12506 df-z 12520 df-uz 12784 df-fz 13457 df-hash 14288 df-edg 29135 df-uspgr 29237 df-usgr 29238 |
| This theorem is referenced by: usgr1eop 29337 1egrvtxdg1 29597 1egrvtxdg0 29599 |
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