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Mirrors > Home > MPE Home > Th. List > upgrfi | Structured version Visualization version GIF version |
Description: An edge is a finite subset of vertices. (Contributed by Mario Carneiro, 11-Mar-2015.) (Revised by AV, 10-Oct-2020.) |
Ref | Expression |
---|---|
isupgr.v | ⊢ 𝑉 = (Vtx‘𝐺) |
isupgr.e | ⊢ 𝐸 = (iEdg‘𝐺) |
Ref | Expression |
---|---|
upgrfi | ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (𝐸‘𝐹) ∈ Fin) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isupgr.v | . . 3 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | isupgr.e | . . 3 ⊢ 𝐸 = (iEdg‘𝐺) | |
3 | 1, 2 | upgrle 29125 | . 2 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (♯‘(𝐸‘𝐹)) ≤ 2) |
4 | 2re 12367 | . . . . . 6 ⊢ 2 ∈ ℝ | |
5 | ltpnf 13183 | . . . . . 6 ⊢ (2 ∈ ℝ → 2 < +∞) | |
6 | 4, 5 | ax-mp 5 | . . . . 5 ⊢ 2 < +∞ |
7 | 4 | rexri 11348 | . . . . . 6 ⊢ 2 ∈ ℝ* |
8 | pnfxr 11344 | . . . . . 6 ⊢ +∞ ∈ ℝ* | |
9 | xrltnle 11357 | . . . . . 6 ⊢ ((2 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (2 < +∞ ↔ ¬ +∞ ≤ 2)) | |
10 | 7, 8, 9 | mp2an 691 | . . . . 5 ⊢ (2 < +∞ ↔ ¬ +∞ ≤ 2) |
11 | 6, 10 | mpbi 230 | . . . 4 ⊢ ¬ +∞ ≤ 2 |
12 | fvex 6933 | . . . . . 6 ⊢ (𝐸‘𝐹) ∈ V | |
13 | hashinf 14384 | . . . . . 6 ⊢ (((𝐸‘𝐹) ∈ V ∧ ¬ (𝐸‘𝐹) ∈ Fin) → (♯‘(𝐸‘𝐹)) = +∞) | |
14 | 12, 13 | mpan 689 | . . . . 5 ⊢ (¬ (𝐸‘𝐹) ∈ Fin → (♯‘(𝐸‘𝐹)) = +∞) |
15 | 14 | breq1d 5176 | . . . 4 ⊢ (¬ (𝐸‘𝐹) ∈ Fin → ((♯‘(𝐸‘𝐹)) ≤ 2 ↔ +∞ ≤ 2)) |
16 | 11, 15 | mtbiri 327 | . . 3 ⊢ (¬ (𝐸‘𝐹) ∈ Fin → ¬ (♯‘(𝐸‘𝐹)) ≤ 2) |
17 | 16 | con4i 114 | . 2 ⊢ ((♯‘(𝐸‘𝐹)) ≤ 2 → (𝐸‘𝐹) ∈ Fin) |
18 | 3, 17 | syl 17 | 1 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (𝐸‘𝐹) ∈ Fin) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ w3a 1087 = wceq 1537 ∈ wcel 2108 Vcvv 3488 class class class wbr 5166 Fn wfn 6568 ‘cfv 6573 Fincfn 9003 ℝcr 11183 +∞cpnf 11321 ℝ*cxr 11323 < clt 11324 ≤ cle 11325 2c2 12348 ♯chash 14379 Vtxcvtx 29031 iEdgciedg 29032 UPGraphcupgr 29115 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-int 4971 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-om 7904 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-1o 8522 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-fin 9007 df-card 10008 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-nn 12294 df-2 12356 df-n0 12554 df-z 12640 df-uz 12904 df-hash 14380 df-upgr 29117 |
This theorem is referenced by: upgrex 29127 |
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