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Mirrors > Home > MPE Home > Th. List > frgrncvvdeqlem4 | Structured version Visualization version GIF version |
Description: Lemma 4 for frgrncvvdeq 27289. The mapping of neighbors to neighbors is a function. (Contributed by Alexander van der Vekens, 22-Dec-2017.) (Revised by AV, 10-May-2021.) |
Ref | Expression |
---|---|
frgrncvvdeq.v1 | ⊢ 𝑉 = (Vtx‘𝐺) |
frgrncvvdeq.e | ⊢ 𝐸 = (Edg‘𝐺) |
frgrncvvdeq.nx | ⊢ 𝐷 = (𝐺 NeighbVtx 𝑋) |
frgrncvvdeq.ny | ⊢ 𝑁 = (𝐺 NeighbVtx 𝑌) |
frgrncvvdeq.x | ⊢ (𝜑 → 𝑋 ∈ 𝑉) |
frgrncvvdeq.y | ⊢ (𝜑 → 𝑌 ∈ 𝑉) |
frgrncvvdeq.ne | ⊢ (𝜑 → 𝑋 ≠ 𝑌) |
frgrncvvdeq.xy | ⊢ (𝜑 → 𝑌 ∉ 𝐷) |
frgrncvvdeq.f | ⊢ (𝜑 → 𝐺 ∈ FriendGraph ) |
frgrncvvdeq.a | ⊢ 𝐴 = (𝑥 ∈ 𝐷 ↦ (℩𝑦 ∈ 𝑁 {𝑥, 𝑦} ∈ 𝐸)) |
Ref | Expression |
---|---|
frgrncvvdeqlem4 | ⊢ (𝜑 → 𝐴:𝐷⟶𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frgrncvvdeq.v1 | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | frgrncvvdeq.e | . . . 4 ⊢ 𝐸 = (Edg‘𝐺) | |
3 | frgrncvvdeq.nx | . . . 4 ⊢ 𝐷 = (𝐺 NeighbVtx 𝑋) | |
4 | frgrncvvdeq.ny | . . . 4 ⊢ 𝑁 = (𝐺 NeighbVtx 𝑌) | |
5 | frgrncvvdeq.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑉) | |
6 | frgrncvvdeq.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝑉) | |
7 | frgrncvvdeq.ne | . . . 4 ⊢ (𝜑 → 𝑋 ≠ 𝑌) | |
8 | frgrncvvdeq.xy | . . . 4 ⊢ (𝜑 → 𝑌 ∉ 𝐷) | |
9 | frgrncvvdeq.f | . . . 4 ⊢ (𝜑 → 𝐺 ∈ FriendGraph ) | |
10 | frgrncvvdeq.a | . . . 4 ⊢ 𝐴 = (𝑥 ∈ 𝐷 ↦ (℩𝑦 ∈ 𝑁 {𝑥, 𝑦} ∈ 𝐸)) | |
11 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 | frgrncvvdeqlem2 27280 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → ∃!𝑦 ∈ 𝑁 {𝑥, 𝑦} ∈ 𝐸) |
12 | riotacl 6665 | . . 3 ⊢ (∃!𝑦 ∈ 𝑁 {𝑥, 𝑦} ∈ 𝐸 → (℩𝑦 ∈ 𝑁 {𝑥, 𝑦} ∈ 𝐸) ∈ 𝑁) | |
13 | 11, 12 | syl 17 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (℩𝑦 ∈ 𝑁 {𝑥, 𝑦} ∈ 𝐸) ∈ 𝑁) |
14 | 13, 10 | fmptd 6425 | 1 ⊢ (𝜑 → 𝐴:𝐷⟶𝑁) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1523 ∈ wcel 2030 ≠ wne 2823 ∉ wnel 2926 ∃!wreu 2943 {cpr 4212 ↦ cmpt 4762 ⟶wf 5922 ‘cfv 5926 ℩crio 6650 (class class class)co 6690 Vtxcvtx 25919 Edgcedg 25984 NeighbVtx cnbgr 26269 FriendGraph cfrgr 27236 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-rep 4804 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-cnex 10030 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-fal 1529 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rmo 2949 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-uni 4469 df-int 4508 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-1st 7210 df-2nd 7211 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-1o 7605 df-2o 7606 df-oadd 7609 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-fin 8001 df-card 8803 df-cda 9028 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-nn 11059 df-2 11117 df-n0 11331 df-xnn0 11402 df-z 11416 df-uz 11726 df-fz 12365 df-hash 13158 df-edg 25985 df-upgr 26022 df-umgr 26023 df-usgr 26091 df-nbgr 26270 df-frgr 27237 |
This theorem is referenced by: frgrncvvdeqlem8 27286 frgrncvvdeqlem9 27287 |
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