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Mirrors > Home > MPE Home > Th. List > usgrnbcnvfv | Structured version Visualization version GIF version |
Description: Applying the edge function on the converse edge function applied on a pair of a vertex and one of its neighbors is this pair in a simple graph. (Contributed by Alexander van der Vekens, 18-Dec-2017.) (Revised by AV, 27-Oct-2020.) |
Ref | Expression |
---|---|
usgrnbcnvfv.i | ⊢ 𝐼 = (iEdg‘𝐺) |
Ref | Expression |
---|---|
usgrnbcnvfv | ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → (𝐼‘(◡𝐼‘{𝐾, 𝑁})) = {𝐾, 𝑁}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | usgrnbcnvfv.i | . . 3 ⊢ 𝐼 = (iEdg‘𝐺) | |
2 | 1 | usgrf1o 26407 | . 2 ⊢ (𝐺 ∈ USGraph → 𝐼:dom 𝐼–1-1-onto→ran 𝐼) |
3 | prcom 4456 | . . 3 ⊢ {𝑁, 𝐾} = {𝐾, 𝑁} | |
4 | eqid 2799 | . . . . . 6 ⊢ (Edg‘𝐺) = (Edg‘𝐺) | |
5 | 4 | nbusgreledg 26591 | . . . . 5 ⊢ (𝐺 ∈ USGraph → (𝑁 ∈ (𝐺 NeighbVtx 𝐾) ↔ {𝑁, 𝐾} ∈ (Edg‘𝐺))) |
6 | edgval 26284 | . . . . . . . 8 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺) | |
7 | 1 | eqcomi 2808 | . . . . . . . . 9 ⊢ (iEdg‘𝐺) = 𝐼 |
8 | 7 | rneqi 5555 | . . . . . . . 8 ⊢ ran (iEdg‘𝐺) = ran 𝐼 |
9 | 6, 8 | eqtri 2821 | . . . . . . 7 ⊢ (Edg‘𝐺) = ran 𝐼 |
10 | 9 | a1i 11 | . . . . . 6 ⊢ (𝐺 ∈ USGraph → (Edg‘𝐺) = ran 𝐼) |
11 | 10 | eleq2d 2864 | . . . . 5 ⊢ (𝐺 ∈ USGraph → ({𝑁, 𝐾} ∈ (Edg‘𝐺) ↔ {𝑁, 𝐾} ∈ ran 𝐼)) |
12 | 5, 11 | bitrd 271 | . . . 4 ⊢ (𝐺 ∈ USGraph → (𝑁 ∈ (𝐺 NeighbVtx 𝐾) ↔ {𝑁, 𝐾} ∈ ran 𝐼)) |
13 | 12 | biimpa 469 | . . 3 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → {𝑁, 𝐾} ∈ ran 𝐼) |
14 | 3, 13 | syl5eqelr 2883 | . 2 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → {𝐾, 𝑁} ∈ ran 𝐼) |
15 | f1ocnvfv2 6761 | . 2 ⊢ ((𝐼:dom 𝐼–1-1-onto→ran 𝐼 ∧ {𝐾, 𝑁} ∈ ran 𝐼) → (𝐼‘(◡𝐼‘{𝐾, 𝑁})) = {𝐾, 𝑁}) | |
16 | 2, 14, 15 | syl2an2r 676 | 1 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → (𝐼‘(◡𝐼‘{𝐾, 𝑁})) = {𝐾, 𝑁}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 385 = wceq 1653 ∈ wcel 2157 {cpr 4370 ◡ccnv 5311 dom cdm 5312 ran crn 5313 –1-1-onto→wf1o 6100 ‘cfv 6101 (class class class)co 6878 iEdgciedg 26232 Edgcedg 26282 USGraphcusgr 26385 NeighbVtx cnbgr 26566 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1891 ax-4 1905 ax-5 2006 ax-6 2072 ax-7 2107 ax-8 2159 ax-9 2166 ax-10 2185 ax-11 2200 ax-12 2213 ax-13 2377 ax-ext 2777 ax-rep 4964 ax-sep 4975 ax-nul 4983 ax-pow 5035 ax-pr 5097 ax-un 7183 ax-cnex 10280 ax-resscn 10281 ax-1cn 10282 ax-icn 10283 ax-addcl 10284 ax-addrcl 10285 ax-mulcl 10286 ax-mulrcl 10287 ax-mulcom 10288 ax-addass 10289 ax-mulass 10290 ax-distr 10291 ax-i2m1 10292 ax-1ne0 10293 ax-1rid 10294 ax-rnegex 10295 ax-rrecex 10296 ax-cnre 10297 ax-pre-lttri 10298 ax-pre-lttrn 10299 ax-pre-ltadd 10300 ax-pre-mulgt0 10301 |
This theorem depends on definitions: df-bi 199 df-an 386 df-or 875 df-3or 1109 df-3an 1110 df-tru 1657 df-fal 1667 df-ex 1876 df-nf 1880 df-sb 2065 df-mo 2591 df-eu 2609 df-clab 2786 df-cleq 2792 df-clel 2795 df-nfc 2930 df-ne 2972 df-nel 3075 df-ral 3094 df-rex 3095 df-reu 3096 df-rmo 3097 df-rab 3098 df-v 3387 df-sbc 3634 df-csb 3729 df-dif 3772 df-un 3774 df-in 3776 df-ss 3783 df-pss 3785 df-nul 4116 df-if 4278 df-pw 4351 df-sn 4369 df-pr 4371 df-tp 4373 df-op 4375 df-uni 4629 df-int 4668 df-iun 4712 df-br 4844 df-opab 4906 df-mpt 4923 df-tr 4946 df-id 5220 df-eprel 5225 df-po 5233 df-so 5234 df-fr 5271 df-we 5273 df-xp 5318 df-rel 5319 df-cnv 5320 df-co 5321 df-dm 5322 df-rn 5323 df-res 5324 df-ima 5325 df-pred 5898 df-ord 5944 df-on 5945 df-lim 5946 df-suc 5947 df-iota 6064 df-fun 6103 df-fn 6104 df-f 6105 df-f1 6106 df-fo 6107 df-f1o 6108 df-fv 6109 df-riota 6839 df-ov 6881 df-oprab 6882 df-mpt2 6883 df-om 7300 df-1st 7401 df-2nd 7402 df-wrecs 7645 df-recs 7707 df-rdg 7745 df-1o 7799 df-2o 7800 df-oadd 7803 df-er 7982 df-en 8196 df-dom 8197 df-sdom 8198 df-fin 8199 df-card 9051 df-cda 9278 df-pnf 10365 df-mnf 10366 df-xr 10367 df-ltxr 10368 df-le 10369 df-sub 10558 df-neg 10559 df-nn 11313 df-2 11376 df-n0 11581 df-xnn0 11653 df-z 11667 df-uz 11931 df-fz 12581 df-hash 13371 df-edg 26283 df-upgr 26317 df-umgr 26318 df-usgr 26387 df-nbgr 26567 |
This theorem is referenced by: (None) |
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