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Theorem dlwwlknondlwlknonf1o 30452
Description: 𝐹 is a bijection between the two representations of double loops of a fixed positive length on a fixed vertex. (Contributed by AV, 30-May-2022.) (Revised by AV, 1-Nov-2022.)
Hypotheses
Ref Expression
dlwwlknondlwlknonbij.v 𝑉 = (Vtx‘𝐺)
dlwwlknondlwlknonbij.w 𝑊 = {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋 ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋)}
dlwwlknondlwlknonbij.d 𝐷 = {𝑤 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑤‘(𝑁 − 2)) = 𝑋}
dlwwlknondlwlknonf1o.f 𝐹 = (𝑐𝑊 ↦ ((2nd𝑐) prefix (♯‘(1st𝑐))))
Assertion
Ref Expression
dlwwlknondlwlknonf1o ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) → 𝐹:𝑊1-1-onto𝐷)
Distinct variable groups:   𝐺,𝑐,𝑤   𝑁,𝑐,𝑤   𝑉,𝑐   𝑊,𝑐   𝑋,𝑐,𝑤
Allowed substitution hints:   𝐷(𝑤,𝑐)   𝐹(𝑤,𝑐)   𝑉(𝑤)   𝑊(𝑤)

Proof of Theorem dlwwlknondlwlknonf1o
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 dlwwlknondlwlknonbij.w . . . 4 𝑊 = {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋 ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋)}
2 df-3an 1089 . . . . 5 (((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋 ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋) ↔ (((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋) ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋))
32rabbii 3406 . . . 4 {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋 ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋)} = {𝑤 ∈ (ClWalks‘𝐺) ∣ (((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋) ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋)}
41, 3eqtri 2760 . . 3 𝑊 = {𝑤 ∈ (ClWalks‘𝐺) ∣ (((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋) ∧ ((2nd𝑤)‘(𝑁 − 2)) = 𝑋)}
5 eqid 2737 . . 3 {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} = {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)}
6 dlwwlknondlwlknonf1o.f . . 3 𝐹 = (𝑐𝑊 ↦ ((2nd𝑐) prefix (♯‘(1st𝑐))))
7 eqid 2737 . . 3 (𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ↦ ((2nd𝑐) prefix (♯‘(1st𝑐)))) = (𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ↦ ((2nd𝑐) prefix (♯‘(1st𝑐))))
8 eluz2nn 12813 . . . 4 (𝑁 ∈ (ℤ‘2) → 𝑁 ∈ ℕ)
9 dlwwlknondlwlknonbij.v . . . . 5 𝑉 = (Vtx‘𝐺)
109, 5, 7clwwlknonclwlknonf1o 30449 . . . 4 ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ ℕ) → (𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ↦ ((2nd𝑐) prefix (♯‘(1st𝑐)))):{𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)}–1-1-onto→(𝑋(ClWWalksNOn‘𝐺)𝑁))
118, 10syl3an3 1166 . . 3 ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) → (𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ↦ ((2nd𝑐) prefix (♯‘(1st𝑐)))):{𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)}–1-1-onto→(𝑋(ClWWalksNOn‘𝐺)𝑁))
12 fveq1 6841 . . . . . . 7 (𝑦 = ((2nd𝑐) prefix (♯‘(1st𝑐))) → (𝑦‘(𝑁 − 2)) = (((2nd𝑐) prefix (♯‘(1st𝑐)))‘(𝑁 − 2)))
13123ad2ant3 1136 . . . . . 6 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ∧ 𝑦 = ((2nd𝑐) prefix (♯‘(1st𝑐)))) → (𝑦‘(𝑁 − 2)) = (((2nd𝑐) prefix (♯‘(1st𝑐)))‘(𝑁 − 2)))
14 2fveq3 6847 . . . . . . . . . . . . 13 (𝑤 = 𝑐 → (♯‘(1st𝑤)) = (♯‘(1st𝑐)))
1514eqeq1d 2739 . . . . . . . . . . . 12 (𝑤 = 𝑐 → ((♯‘(1st𝑤)) = 𝑁 ↔ (♯‘(1st𝑐)) = 𝑁))
16 fveq2 6842 . . . . . . . . . . . . . 14 (𝑤 = 𝑐 → (2nd𝑤) = (2nd𝑐))
1716fveq1d 6844 . . . . . . . . . . . . 13 (𝑤 = 𝑐 → ((2nd𝑤)‘0) = ((2nd𝑐)‘0))
1817eqeq1d 2739 . . . . . . . . . . . 12 (𝑤 = 𝑐 → (((2nd𝑤)‘0) = 𝑋 ↔ ((2nd𝑐)‘0) = 𝑋))
1915, 18anbi12d 633 . . . . . . . . . . 11 (𝑤 = 𝑐 → (((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋) ↔ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)))
2019elrab 3648 . . . . . . . . . 10 (𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ↔ (𝑐 ∈ (ClWalks‘𝐺) ∧ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)))
21 simplrl 777 . . . . . . . . . . . 12 (((𝑐 ∈ (ClWalks‘𝐺) ∧ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)) ∧ (𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2))) → (♯‘(1st𝑐)) = 𝑁)
22 simpll 767 . . . . . . . . . . . 12 (((𝑐 ∈ (ClWalks‘𝐺) ∧ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)) ∧ (𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2))) → 𝑐 ∈ (ClWalks‘𝐺))
23 simpr3 1198 . . . . . . . . . . . 12 (((𝑐 ∈ (ClWalks‘𝐺) ∧ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)) ∧ (𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2))) → 𝑁 ∈ (ℤ‘2))
2421, 22, 233jca 1129 . . . . . . . . . . 11 (((𝑐 ∈ (ClWalks‘𝐺) ∧ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)) ∧ (𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2))) → ((♯‘(1st𝑐)) = 𝑁𝑐 ∈ (ClWalks‘𝐺) ∧ 𝑁 ∈ (ℤ‘2)))
2524ex 412 . . . . . . . . . 10 ((𝑐 ∈ (ClWalks‘𝐺) ∧ ((♯‘(1st𝑐)) = 𝑁 ∧ ((2nd𝑐)‘0) = 𝑋)) → ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) → ((♯‘(1st𝑐)) = 𝑁𝑐 ∈ (ClWalks‘𝐺) ∧ 𝑁 ∈ (ℤ‘2))))
2620, 25sylbi 217 . . . . . . . . 9 (𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} → ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) → ((♯‘(1st𝑐)) = 𝑁𝑐 ∈ (ClWalks‘𝐺) ∧ 𝑁 ∈ (ℤ‘2))))
2726impcom 407 . . . . . . . 8 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)}) → ((♯‘(1st𝑐)) = 𝑁𝑐 ∈ (ClWalks‘𝐺) ∧ 𝑁 ∈ (ℤ‘2)))
28 dlwwlknondlwlknonf1olem1 30451 . . . . . . . 8 (((♯‘(1st𝑐)) = 𝑁𝑐 ∈ (ClWalks‘𝐺) ∧ 𝑁 ∈ (ℤ‘2)) → (((2nd𝑐) prefix (♯‘(1st𝑐)))‘(𝑁 − 2)) = ((2nd𝑐)‘(𝑁 − 2)))
2927, 28syl 17 . . . . . . 7 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)}) → (((2nd𝑐) prefix (♯‘(1st𝑐)))‘(𝑁 − 2)) = ((2nd𝑐)‘(𝑁 − 2)))
30293adant3 1133 . . . . . 6 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ∧ 𝑦 = ((2nd𝑐) prefix (♯‘(1st𝑐)))) → (((2nd𝑐) prefix (♯‘(1st𝑐)))‘(𝑁 − 2)) = ((2nd𝑐)‘(𝑁 − 2)))
3113, 30eqtrd 2772 . . . . 5 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ∧ 𝑦 = ((2nd𝑐) prefix (♯‘(1st𝑐)))) → (𝑦‘(𝑁 − 2)) = ((2nd𝑐)‘(𝑁 − 2)))
3231eqeq1d 2739 . . . 4 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ∧ 𝑦 = ((2nd𝑐) prefix (♯‘(1st𝑐)))) → ((𝑦‘(𝑁 − 2)) = 𝑋 ↔ ((2nd𝑐)‘(𝑁 − 2)) = 𝑋))
33 nfv 1916 . . . . 5 𝑤((2nd𝑐)‘(𝑁 − 2)) = 𝑋
3416fveq1d 6844 . . . . . 6 (𝑤 = 𝑐 → ((2nd𝑤)‘(𝑁 − 2)) = ((2nd𝑐)‘(𝑁 − 2)))
3534eqeq1d 2739 . . . . 5 (𝑤 = 𝑐 → (((2nd𝑤)‘(𝑁 − 2)) = 𝑋 ↔ ((2nd𝑐)‘(𝑁 − 2)) = 𝑋))
3633, 35sbiev 2320 . . . 4 ([𝑐 / 𝑤]((2nd𝑤)‘(𝑁 − 2)) = 𝑋 ↔ ((2nd𝑐)‘(𝑁 − 2)) = 𝑋)
3732, 36bitr4di 289 . . 3 (((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) ∧ 𝑐 ∈ {𝑤 ∈ (ClWalks‘𝐺) ∣ ((♯‘(1st𝑤)) = 𝑁 ∧ ((2nd𝑤)‘0) = 𝑋)} ∧ 𝑦 = ((2nd𝑐) prefix (♯‘(1st𝑐)))) → ((𝑦‘(𝑁 − 2)) = 𝑋 ↔ [𝑐 / 𝑤]((2nd𝑤)‘(𝑁 − 2)) = 𝑋))
384, 5, 6, 7, 11, 37f1ossf1o 7083 . 2 ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) → 𝐹:𝑊1-1-onto→{𝑦 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑦‘(𝑁 − 2)) = 𝑋})
39 dlwwlknondlwlknonbij.d . . . 4 𝐷 = {𝑤 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑤‘(𝑁 − 2)) = 𝑋}
40 fveq1 6841 . . . . . 6 (𝑤 = 𝑦 → (𝑤‘(𝑁 − 2)) = (𝑦‘(𝑁 − 2)))
4140eqeq1d 2739 . . . . 5 (𝑤 = 𝑦 → ((𝑤‘(𝑁 − 2)) = 𝑋 ↔ (𝑦‘(𝑁 − 2)) = 𝑋))
4241cbvrabv 3411 . . . 4 {𝑤 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑤‘(𝑁 − 2)) = 𝑋} = {𝑦 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑦‘(𝑁 − 2)) = 𝑋}
4339, 42eqtri 2760 . . 3 𝐷 = {𝑦 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑦‘(𝑁 − 2)) = 𝑋}
44 f1oeq3 6772 . . 3 (𝐷 = {𝑦 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑦‘(𝑁 − 2)) = 𝑋} → (𝐹:𝑊1-1-onto𝐷𝐹:𝑊1-1-onto→{𝑦 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑦‘(𝑁 − 2)) = 𝑋}))
4543, 44ax-mp 5 . 2 (𝐹:𝑊1-1-onto𝐷𝐹:𝑊1-1-onto→{𝑦 ∈ (𝑋(ClWWalksNOn‘𝐺)𝑁) ∣ (𝑦‘(𝑁 − 2)) = 𝑋})
4638, 45sylibr 234 1 ((𝐺 ∈ USPGraph ∧ 𝑋𝑉𝑁 ∈ (ℤ‘2)) → 𝐹:𝑊1-1-onto𝐷)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  w3a 1087   = wceq 1542  [wsb 2068  wcel 2114  {crab 3401  cmpt 5181  1-1-ontowf1o 6499  cfv 6500  (class class class)co 7368  1st c1st 7941  2nd c2nd 7942  0cc0 11038  cmin 11376  cn 12157  2c2 12212  cuz 12763  chash 14265   prefix cpfx 14606  Vtxcvtx 29081  USPGraphcuspgr 29233  ClWalkscclwlks 29855  ClWWalksNOncclwwlknon 30174
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5226  ax-sep 5243  ax-nul 5253  ax-pow 5312  ax-pr 5379  ax-un 7690  ax-cnex 11094  ax-resscn 11095  ax-1cn 11096  ax-icn 11097  ax-addcl 11098  ax-addrcl 11099  ax-mulcl 11100  ax-mulrcl 11101  ax-mulcom 11102  ax-addass 11103  ax-mulass 11104  ax-distr 11105  ax-i2m1 11106  ax-1ne0 11107  ax-1rid 11108  ax-rnegex 11109  ax-rrecex 11110  ax-cnre 11111  ax-pre-lttri 11112  ax-pre-lttrn 11113  ax-pre-ltadd 11114  ax-pre-mulgt0 11115
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-ifp 1064  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3063  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-int 4905  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5527  df-eprel 5532  df-po 5540  df-so 5541  df-fr 5585  df-we 5587  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-pred 6267  df-ord 6328  df-on 6329  df-lim 6330  df-suc 6331  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-riota 7325  df-ov 7371  df-oprab 7372  df-mpo 7373  df-om 7819  df-1st 7943  df-2nd 7944  df-frecs 8233  df-wrecs 8264  df-recs 8313  df-rdg 8351  df-1o 8407  df-2o 8408  df-oadd 8411  df-er 8645  df-map 8777  df-pm 8778  df-en 8896  df-dom 8897  df-sdom 8898  df-fin 8899  df-dju 9825  df-card 9863  df-pnf 11180  df-mnf 11181  df-xr 11182  df-ltxr 11183  df-le 11184  df-sub 11378  df-neg 11379  df-nn 12158  df-2 12220  df-n0 12414  df-xnn0 12487  df-z 12501  df-uz 12764  df-rp 12918  df-fz 13436  df-fzo 13583  df-hash 14266  df-word 14449  df-lsw 14498  df-concat 14506  df-s1 14532  df-substr 14577  df-pfx 14607  df-edg 29133  df-uhgr 29143  df-upgr 29167  df-uspgr 29235  df-wlks 29685  df-clwlks 29856  df-clwwlk 30069  df-clwwlkn 30112  df-clwwlknon 30175
This theorem is referenced by:  dlwwlknondlwlknonen  30453
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