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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 4623 | . . . . . 6 ⊢ {𝐵, 𝐶} ∈ {{𝐵, 𝐶}} |
| 4 | f1sng 6862 | . . . . . 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 3971 | . . . . . . 7 ⊢ (𝜑 → {𝐵, 𝐶} ⊆ (Vtx‘𝐺)) |
| 11 | 2 | elpw 4561 | . . . . . . 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 29570 | . . . . 5 ⊢ (𝜑 → {{𝐵, 𝐶}} ⊆ {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 14 | f1ss 6779 | . . . . 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 29570 | . . . . . 6 ⊢ (𝜑 → {{𝐵, 𝐶}} ⊆ {𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) |
| 18 | f1ss 6779 | . . . . . 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 6778 | . . . . 5 ⊢ ({〈𝐴, {𝐵, 𝐶}〉}:{𝐴}–1-1→{𝑥 ∈ (V ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} → dom {〈𝐴, {𝐵, 𝐶}〉} = {𝐴}) | |
| 21 | f1eq2 6768 | . . . . 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 5889 | . . . 4 ⊢ (𝜑 → dom (iEdg‘𝐺) = dom {〈𝐴, {𝐵, 𝐶}〉}) |
| 26 | eqidd 2761 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2} = {𝑥 ∈ (𝒫 (Vtx‘𝐺) ∖ {∅}) ∣ (♯‘𝑥) ≤ 2}) | |
| 27 | 24, 25, 26 | f1eq123d 6810 | . . 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 29460 | . . 3 ⊢ (𝐵 ∈ 𝑉 → 𝐺 ∈ V) |
| 30 | eqid 2760 | . . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
| 31 | eqid 2760 | . . . 4 ⊢ (iEdg‘𝐺) = (iEdg‘𝐺) | |
| 32 | 30, 31 | isuspgr 29613 | . . 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 2145 {crab 3412 Vcvv 3450 ∖ cdif 3896 ⊆ wss 3899 ∅c0 4279 𝒫 cpw 4557 {csn 4584 {cpr 4586 〈cop 4590 class class class wbr 5103 dom cdm 5655 –1-1→wf1 6530 ‘cfv 6533 ≤ cle 11269 2c2 12320 ♯chash 14395 Vtxcvtx 29454 iEdgciedg 29455 USPGraphcuspgr 29609 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-addrcl 11186 ax-mulcl 11187 ax-mulrcl 11188 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-i2m1 11193 ax-1ne0 11194 ax-1rid 11195 ax-rnegex 11196 ax-rrecex 11197 ax-cnre 11198 ax-pre-lttri 11199 ax-pre-lttrn 11200 ax-pre-ltadd 11201 ax-pre-mulgt0 11202 |
| 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 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8456 df-oadd 8460 df-er 8697 df-en 8954 df-dom 8955 df-sdom 8956 df-fin 8957 df-dju 9907 df-card 9945 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 df-sub 11468 df-neg 11469 df-nn 12259 df-2 12328 df-n0 12530 df-xnn0 12603 df-z 12617 df-uz 12889 df-fz 13563 df-hash 14396 df-uspgr 29611 |
| This theorem is used by: usgr1e 29706 uspgr1eop 29708 1loopgruspgr 29961 |
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