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| Mirrors > Home > MPE Home > Th. List > uspgredgleord | Structured version Visualization version GIF version | ||
| Description: In a simple pseudograph the number of edges which contain a given vertex is not greater than the number of vertices. (Contributed by Alexander van der Vekens, 4-Jan-2018.) (Revised by AV, 6-Dec-2020.) |
| Ref | Expression |
|---|---|
| usgredgleord.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| usgredgleord.e | ⊢ 𝐸 = (Edg‘𝐺) |
| Ref | Expression |
|---|---|
| uspgredgleord | ⊢ ((𝐺 ∈ USPGraph ∧ 𝑁 ∈ 𝑉) → (♯‘{𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒}) ≤ (♯‘𝑉)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | usgredgleord.v | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 2 | 1 | fvexi 6831 | . . 3 ⊢ 𝑉 ∈ V |
| 3 | usgredgleord.e | . . . 4 ⊢ 𝐸 = (Edg‘𝐺) | |
| 4 | eqid 2730 | . . . 4 ⊢ {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} = {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} | |
| 5 | eqid 2730 | . . . 4 ⊢ (𝑥 ∈ {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ↦ (℩𝑦 ∈ 𝑉 𝑥 = {𝑁, 𝑦})) = (𝑥 ∈ {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ↦ (℩𝑦 ∈ 𝑉 𝑥 = {𝑁, 𝑦})) | |
| 6 | 1, 3, 4, 5 | uspgredg2v 29195 | . . 3 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑁 ∈ 𝑉) → (𝑥 ∈ {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ↦ (℩𝑦 ∈ 𝑉 𝑥 = {𝑁, 𝑦})):{𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒}–1-1→𝑉) |
| 7 | f1domg 8889 | . . 3 ⊢ (𝑉 ∈ V → ((𝑥 ∈ {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ↦ (℩𝑦 ∈ 𝑉 𝑥 = {𝑁, 𝑦})):{𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒}–1-1→𝑉 → {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ≼ 𝑉)) | |
| 8 | 2, 6, 7 | mpsyl 68 | . 2 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑁 ∈ 𝑉) → {𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ≼ 𝑉) |
| 9 | hashdomi 14279 | . 2 ⊢ ({𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒} ≼ 𝑉 → (♯‘{𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒}) ≤ (♯‘𝑉)) | |
| 10 | 8, 9 | syl 17 | 1 ⊢ ((𝐺 ∈ USPGraph ∧ 𝑁 ∈ 𝑉) → (♯‘{𝑒 ∈ 𝐸 ∣ 𝑁 ∈ 𝑒}) ≤ (♯‘𝑉)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2110 {crab 3393 Vcvv 3434 {cpr 4576 class class class wbr 5089 ↦ cmpt 5170 –1-1→wf1 6474 ‘cfv 6477 ℩crio 7297 ≼ cdom 8862 ≤ cle 11139 ♯chash 14229 Vtxcvtx 28967 Edgcedg 29018 USPGraphcuspgr 29119 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2112 ax-9 2120 ax-10 2143 ax-11 2159 ax-12 2179 ax-ext 2702 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7663 ax-cnex 11054 ax-resscn 11055 ax-1cn 11056 ax-icn 11057 ax-addcl 11058 ax-addrcl 11059 ax-mulcl 11060 ax-mulrcl 11061 ax-mulcom 11062 ax-addass 11063 ax-mulass 11064 ax-distr 11065 ax-i2m1 11066 ax-1ne0 11067 ax-1rid 11068 ax-rnegex 11069 ax-rrecex 11070 ax-cnre 11071 ax-pre-lttri 11072 ax-pre-lttrn 11073 ax-pre-ltadd 11074 ax-pre-mulgt0 11075 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3344 df-reu 3345 df-rab 3394 df-v 3436 df-sbc 3740 df-csb 3849 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-pss 3920 df-nul 4282 df-if 4474 df-pw 4550 df-sn 4575 df-pr 4577 df-op 4581 df-uni 4858 df-int 4896 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6244 df-ord 6305 df-on 6306 df-lim 6307 df-suc 6308 df-iota 6433 df-fun 6479 df-fn 6480 df-f 6481 df-f1 6482 df-fo 6483 df-f1o 6484 df-fv 6485 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-1st 7916 df-2nd 7917 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-1o 8380 df-2o 8381 df-oadd 8384 df-er 8617 df-en 8865 df-dom 8866 df-sdom 8867 df-fin 8868 df-dju 9786 df-card 9824 df-pnf 11140 df-mnf 11141 df-xr 11142 df-ltxr 11143 df-le 11144 df-sub 11338 df-neg 11339 df-nn 12118 df-2 12180 df-n0 12374 df-xnn0 12447 df-z 12461 df-uz 12725 df-fz 13400 df-hash 14230 df-edg 29019 df-upgr 29053 df-uspgr 29121 |
| This theorem is referenced by: usgredgleord 29204 |
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