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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 29782 | . 2 ⊢ (𝐺 ∈ USGraph → 𝐼:dom 𝐼⟶1-1ontoran 𝐼) |
| 3 | prcom 4693 | . . 3 ⊢ {𝑁, 𝐾} = {𝐾, 𝑁} | |
| 4 | eqid 2763 | . . . . . 6 ⊢ (Edg‘𝐺) = (Edg‘𝐺) | |
| 5 | 4 | nbusgreledg 29964 | . . . . 5 ⊢ (𝐺 ∈ USGraph → (𝑁 ∈ (𝐺 NeighbVtx 𝐾) ↔ {𝑁, 𝐾} ∈ (Edg‘𝐺))) |
| 6 | edgval 29657 | . . . . . . . 8 ⊢ (Edg‘𝐺) = ran (iEdg‘𝐺) | |
| 7 | 1 | eqcomi 2772 | . . . . . . . . 9 ⊢ (iEdg‘𝐺) = 𝐼 |
| 8 | 7 | rneqi 5926 | . . . . . . . 8 ⊢ ran (iEdg‘𝐺) = ran 𝐼 |
| 9 | 6, 8 | eqtri 2786 | . . . . . . 7 ⊢ (Edg‘𝐺) = ran 𝐼 |
| 10 | 9 | a1i 11 | . . . . . 6 ⊢ (𝐺 ∈ USGraph → (Edg‘𝐺) = ran 𝐼) |
| 11 | 10 | eleq2d 2850 | . . . . 5 ⊢ (𝐺 ∈ USGraph → ({𝑁, 𝐾} ∈ (Edg‘𝐺) ↔ {𝑁, 𝐾} ∈ ran 𝐼)) |
| 12 | 5, 11 | bitrd 282 | . . . 4 ⊢ (𝐺 ∈ USGraph → (𝑁 ∈ (𝐺 NeighbVtx 𝐾) ↔ {𝑁, 𝐾} ∈ ran 𝐼)) |
| 13 | 12 | biimpa 482 | . . 3 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → {𝑁, 𝐾} ∈ ran 𝐼) |
| 14 | 3, 13 | eqeltrrid 2869 | . 2 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → {𝐾, 𝑁} ∈ ran 𝐼) |
| 15 | f1ocnvfv2 7308 | . 2 ⊢ ((𝐼:dom 𝐼⟶1-1ontoran 𝐼 ∧ {𝐾, 𝑁} ∈ ran 𝐼) → (𝐼‘(◡𝐼‘{𝐾, 𝑁})) = {𝐾, 𝑁}) | |
| 16 | 2, 14, 15 | syl2an2r 698 | 1 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ (𝐺 NeighbVtx 𝐾)) → (𝐼‘(◡𝐼‘{𝐾, 𝑁})) = {𝐾, 𝑁}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 {cpr 4590 ◡ccnv 5654 dom cdm 5655 ran crn 5656 ⟶1-1ontowf1o 6557 ‘cfv 6558 (class class class)co 7443 iEdgciedg 29605 Edgcedg 29655 USGraphcusgr 29760 NeighbVtx cnbgr 29943 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 ax-cnex 11283 ax-resscn 11284 ax-1cn 11285 ax-icn 11286 ax-addcl 11287 ax-addrcl 11288 ax-mulcl 11289 ax-mulrcl 11290 ax-mulcom 11291 ax-addass 11292 ax-mulass 11293 ax-distr 11294 ax-i2m1 11295 ax-1ne0 11296 ax-1rid 11297 ax-rnegex 11298 ax-rrecex 11299 ax-cnre 11300 ax-pre-lttri 11301 ax-pre-lttrn 11302 ax-pre-ltadd 11303 ax-pre-mulgt0 11304 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 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 6322 df-ord 6383 df-on 6384 df-lim 6385 df-suc 6386 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-riota 7400 df-ov 7446 df-oprab 7447 df-mpo 7448 df-om 7902 df-1st 8025 df-2nd 8026 df-frecs 8327 df-wrecs 8358 df-recs 8407 df-rdg 8446 df-1o 8504 df-2o 8505 df-oadd 8508 df-er 8745 df-en 9002 df-dom 9003 df-sdom 9004 df-fin 9005 df-dju 10009 df-card 10047 df-pnf 11372 df-mnf 11373 df-xr 11374 df-ltxr 11375 df-le 11376 df-sub 11570 df-neg 11571 df-nn 12363 df-2 12432 df-n0 12634 df-xnn0 12707 df-z 12721 df-uz 12993 df-fz 13667 df-hash 14502 df-edg 29656 df-upgr 29690 df-umgr 29691 df-usgr 29762 df-nbgr 29944 |
| This theorem is used by: (None) |
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