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| Mirrors > Home > MPE Home > Th. List > uspgr1e | Structured version Visualization version GIF version | ||
| Description: A simple pseudograph with one edge. (Contributed by Alexander van der Vekens, 10-Aug-2017.) (Revised by AV, 16-Oct-2020.) (Revised by AV, 21-Mar-2021.) (Proof shortened by AV, 17-Apr-2021.) |
| 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}〉}) |
| Ref | Expression |
|---|---|
| uspgr1e | ⊢ (𝜑 → 𝐺 ∈ USPGraph) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uspgr1e.a | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝑋) | |
| 2 | prex 5403 | . . . . . . 7 ⊢ {𝐵, 𝐶} ∈ V | |
| 3 | 2 | snid 4624 | . . . . . 6 ⊢ {𝐵, 𝐶} ∈ {{𝐵, 𝐶}} |
| 4 | f1sng 6899 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑋 ∧ {𝐵, 𝐶} ∈ {{𝐵, 𝐶}}) → {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{{𝐵, 𝐶}}) | |
| 5 | 1, 3, 4 | sylancl 598 | . . . . 5 ⊢ (𝜑 → {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{{𝐵, 𝐶}}) |
| 6 | uspgr1e.b | . . . . . . . . 9 ⊢ (𝜑 → 𝐵 ∈ 𝑉) | |
| 7 | uspgr1e.c | . . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ 𝑉) | |
| 8 | 6, 7 | prssd 4783 | . . . . . . . 8 ⊢ (𝜑 → {𝐵, 𝐶} ⊆ 𝑉) |
| 9 | uspgr1e.v | . . . . . . . 8 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 10 | 8, 9 | sseqtrdi 3953 | . . . . . . 7 ⊢ (𝜑 → {𝐵, 𝐶} ⊆ (Vtx‘𝐺)) |
| 11 | 2 | elpw 4564 | . . . . . . 7 ⊢ ({𝐵, 𝐶} ∈ 𝒫 (Vtx‘𝐺) ↔ {𝐵, 𝐶} ⊆ (Vtx‘𝐺)) |
| 12 | 10, 11 | sylibr 237 | . . . . . 6 ⊢ (𝜑 → {𝐵, 𝐶} ∈ 𝒫 (Vtx‘𝐺)) |
| 13 | 12, 6 | upgr1elem 29747 | . . . . 5 ⊢ (𝜑 → {{𝐵, 𝐶}} ⊆ {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 14 | f1ss 6815 | . . . . 5 ⊢ (({〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{{𝐵, 𝐶}} ∧ {{𝐵, 𝐶}} ⊆ {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) → {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) | |
| 15 | 5, 13, 14 | syl2anc 596 | . . . 4 ⊢ (𝜑 → {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 16 | 2 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → {𝐵, 𝐶} ∈ V) |
| 17 | 16, 6 | upgr1elem 29747 | . . . . . 6 ⊢ (𝜑 → {{𝐵, 𝐶}} ⊆ {𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 18 | f1ss 6815 | . . . . . 6 ⊢ (({〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{{𝐵, 𝐶}} ∧ {{𝐵, 𝐶}} ⊆ {𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) → {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) | |
| 19 | 5, 17, 18 | syl2anc 596 | . . . . 5 ⊢ (𝜑 → {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 20 | f1dm 6814 | . . . . 5 ⊢ ({〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} → dom {〈𝐴, {𝐵, 𝐶}〉} = {𝐴}) | |
| 21 | f1eq2 6804 | . . . . 5 ⊢ (dom {〈𝐴, {𝐵, 𝐶}〉} = {𝐴} → ({〈𝐴, {𝐵, 𝐶}〉}:dom {〈𝐴, {𝐵, 𝐶}〉}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} ↔ {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2})) | |
| 22 | 19, 20, 21 | 3syl 19 | . . . 4 ⊢ (𝜑 → ({〈𝐴, {𝐵, 𝐶}〉}:dom {〈𝐴, {𝐵, 𝐶}〉}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} ↔ {〈𝐴, {𝐵, 𝐶}〉}:{𝐴}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2})) |
| 23 | 15, 22 | mpbird 260 | . . 3 ⊢ (𝜑 → {〈𝐴, {𝐵, 𝐶}〉}:dom {〈𝐴, {𝐵, 𝐶}〉}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 24 | uspgr1e.e | . . . 4 ⊢ (𝜑 → (iEdg‘𝐺) = {〈𝐴, {𝐵, 𝐶}〉}) | |
| 25 | 24 | dmeqd 5899 | . . . 4 ⊢ (𝜑 → dom (iEdg‘𝐺) = dom {〈𝐴, {𝐵, 𝐶}〉}) |
| 26 | eqidd 2764 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} = {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) | |
| 27 | 24, 25, 26 | f1eq123d 6846 | . . 3 ⊢ (𝜑 → ((iEdg‘𝐺):dom (iEdg‘𝐺)⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} ↔ {〈𝐴, {𝐵, 𝐶}〉}:dom {〈𝐴, {𝐵, 𝐶}〉}⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2})) |
| 28 | 23, 27 | mpbird 260 | . 2 ⊢ (𝜑 → (iEdg‘𝐺):dom (iEdg‘𝐺)⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 29 | 9 | 1vgrex 29637 | . . 3 ⊢ (𝐵 ∈ 𝑉 → 𝐺 ∈ V) |
| 30 | eqid 2763 | . . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
| 31 | eqid 2763 | . . . 4 ⊢ (iEdg‘𝐺) = (iEdg‘𝐺) | |
| 32 | 30, 31 | isuspgr 29790 | . . 3 ⊢ (𝐺 ∈ V → (𝐺 ∈ USPGraph ↔ (iEdg‘𝐺):dom (iEdg‘𝐺)⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2})) |
| 33 | 6, 29, 32 | 3syl 19 | . 2 ⊢ (𝜑 → (𝐺 ∈ USPGraph ↔ (iEdg‘𝐺):dom (iEdg‘𝐺)⟶1-1{𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2})) |
| 34 | 28, 33 | mpbird 260 | 1 ⊢ (𝜑 → 𝐺 ∈ USPGraph) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2147 {crab 3416 Vcvv 3454 ⊆ wss 3900 ∖ cdif 4048 ∅c0 4281 𝒫 cpw 4560 {csn 4588 {cpr 4590 〈cop 4840 class class class wbr 5108 dom cdm 5658 ⟶1-1wf1 6563 ‘cfv 6566 ≤ cle 11383 2c2 12437 ♯chash 14515 Vtxcvtx 29631 iEdgciedg 29632 USPGraphcuspgr 29786 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-int 4913 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-1o 8514 df-oadd 8518 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-fin 9015 df-dju 10019 df-card 10057 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-nn 12376 df-2 12445 df-n0 12647 df-xnn0 12720 df-z 12734 df-uz 13006 df-fz 13680 df-hash 14516 df-uspgr 29788 |
| This theorem is used by: usgr1e 29883 uspgr1eop 29885 1loopgruspgr 30138 |
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