umgr2cycllem - Mathbox for BTernaryTau

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Theorem umgr2cycllem 34429

Description: Lemma for umgr2cycl 34430. (Contributed by BTernaryTau, 17-Oct-2023.)

**Hypotheses**
Ref	Expression
umgr2cycllem.1	⊢ 𝐹 = ⟨“𝐽𝐾”⟩
umgr2cycllem.2	⊢ 𝐼 = (iEdg‘𝐺)
umgr2cycllem.3	⊢ (𝜑 → 𝐺 ∈ UMGraph)
umgr2cycllem.4	⊢ (𝜑 → 𝐽 ∈ dom 𝐼)
umgr2cycllem.5	⊢ (𝜑 → 𝐽 ≠ 𝐾)
umgr2cycllem.6	⊢ (𝜑 → (𝐼‘𝐽) = (𝐼‘𝐾))

**Assertion**
Ref	Expression
umgr2cycllem	⊢ (𝜑 → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)

Distinct variable groups: 𝐹,𝑝 𝐺,𝑝 Allowed substitution hints: 𝜑(𝑝) 𝐼(𝑝) 𝐽(𝑝) 𝐾(𝑝)

Proof of Theorem umgr2cycllem Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		umgr2cycllem.3	. . 3 ⊢ (𝜑 → 𝐺 ∈ UMGraph)
2		umgruhgr 28631	. . . . 5 ⊢ (𝐺 ∈ UMGraph → 𝐺 ∈ UHGraph)
3		umgr2cycllem.2	. . . . . 6 ⊢ 𝐼 = (iEdg‘𝐺)
4	3	uhgrfun 28593	. . . . 5 ⊢ (𝐺 ∈ UHGraph → Fun 𝐼)
5	1, 2, 4	3syl 18	. . . 4 ⊢ (𝜑 → Fun 𝐼)
6		umgr2cycllem.4	. . . 4 ⊢ (𝜑 → 𝐽 ∈ dom 𝐼)
7	3	iedgedg 28577	. . . 4 ⊢ ((Fun 𝐼 ∧ 𝐽 ∈ dom 𝐼) → (𝐼‘𝐽) ∈ (Edg‘𝐺))
8	5, 6, 7	syl2anc 582	. . 3 ⊢ (𝜑 → (𝐼‘𝐽) ∈ (Edg‘𝐺))
9		eqid 2730	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
10		eqid 2730	. . . 4 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
11	9, 10	umgredg 28665	. . 3 ⊢ ((𝐺 ∈ UMGraph ∧ (𝐼‘𝐽) ∈ (Edg‘𝐺)) → ∃𝑎 ∈ (Vtx‘𝐺)∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}))
12	1, 8, 11	syl2anc 582	. 2 ⊢ (𝜑 → ∃𝑎 ∈ (Vtx‘𝐺)∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}))
13		ax-5 1911	. . . . . . 7 ⊢ (𝑎 ∈ (Vtx‘𝐺) → ∀𝑏 𝑎 ∈ (Vtx‘𝐺))
14		alral 3073	. . . . . . 7 ⊢ (∀𝑏 𝑎 ∈ (Vtx‘𝐺) → ∀𝑏 ∈ (Vtx‘𝐺)𝑎 ∈ (Vtx‘𝐺))
15	13, 14	syl 17	. . . . . 6 ⊢ (𝑎 ∈ (Vtx‘𝐺) → ∀𝑏 ∈ (Vtx‘𝐺)𝑎 ∈ (Vtx‘𝐺))
16		r19.29 3112	. . . . . 6 ⊢ ((∀𝑏 ∈ (Vtx‘𝐺)𝑎 ∈ (Vtx‘𝐺) ∧ ∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → ∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ∈ (Vtx‘𝐺) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})))
17	15, 16	sylan 578	. . . . 5 ⊢ ((𝑎 ∈ (Vtx‘𝐺) ∧ ∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → ∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ∈ (Vtx‘𝐺) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})))
18		eqid 2730	. . . . . . . . . . . 12 ⊢ ⟨“𝑎𝑏𝑎”⟩ = ⟨“𝑎𝑏𝑎”⟩
19		umgr2cycllem.1	. . . . . . . . . . . 12 ⊢ 𝐹 = ⟨“𝐽𝐾”⟩
20		simp2 1135	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)))
21		simp3l 1199	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝑎 ≠ 𝑏)
22		eqimss2 4040	. . . . . . . . . . . . . . 15 ⊢ ((𝐼‘𝐽) = {𝑎, 𝑏} → {𝑎, 𝑏} ⊆ (𝐼‘𝐽))
23	22	adantl 480	. . . . . . . . . . . . . 14 ⊢ ((𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → {𝑎, 𝑏} ⊆ (𝐼‘𝐽))
24	23	3ad2ant3 1133	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → {𝑎, 𝑏} ⊆ (𝐼‘𝐽))
25		umgr2cycllem.6	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐼‘𝐽) = (𝐼‘𝐾))
26	25	sseq2d 4013	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ({𝑎, 𝑏} ⊆ (𝐼‘𝐽) ↔ {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
27	22, 26	imbitrid 243	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ((𝐼‘𝐽) = {𝑎, 𝑏} → {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
28	27	adantld 489	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
29	28	adantld 489	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (((𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
30	29	3impib 1114	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → {𝑎, 𝑏} ⊆ (𝐼‘𝐾))
31	24, 30	jca 510	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → ({𝑎, 𝑏} ⊆ (𝐼‘𝐽) ∧ {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
32		umgr2cycllem.5	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐽 ≠ 𝐾)
33	32	3ad2ant1 1131	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐽 ≠ 𝐾)
34	18, 19, 20, 21, 31, 9, 3, 33	2cycl2d 34428	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩)
35	34	3expib 1120	. . . . . . . . . 10 ⊢ (𝜑 → (((𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩))
36	35	exp4c 431	. . . . . . . . 9 ⊢ (𝜑 → (𝑎 ∈ (Vtx‘𝐺) → (𝑏 ∈ (Vtx‘𝐺) → ((𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩))))
37	36	com23 86	. . . . . . . 8 ⊢ (𝜑 → (𝑏 ∈ (Vtx‘𝐺) → (𝑎 ∈ (Vtx‘𝐺) → ((𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩))))
38	37	imp4a 421	. . . . . . 7 ⊢ (𝜑 → (𝑏 ∈ (Vtx‘𝐺) → ((𝑎 ∈ (Vtx‘𝐺) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩)))
39		s3cli 14836	. . . . . . . . 9 ⊢ ⟨“𝑎𝑏𝑎”⟩ ∈ Word V
40		breq2 5151	. . . . . . . . . 10 ⊢ (𝑝 = ⟨“𝑎𝑏𝑎”⟩ → (𝐹(Cycles‘𝐺)𝑝 ↔ 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩))
41	40	rspcev 3611	. . . . . . . . 9 ⊢ ((⟨“𝑎𝑏𝑎”⟩ ∈ Word V ∧ 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩) → ∃𝑝 ∈ Word V𝐹(Cycles‘𝐺)𝑝)
42	39, 41	mpan 686	. . . . . . . 8 ⊢ (𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩ → ∃𝑝 ∈ Word V𝐹(Cycles‘𝐺)𝑝)
43		rexex 3074	. . . . . . . 8 ⊢ (∃𝑝 ∈ Word V𝐹(Cycles‘𝐺)𝑝 → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)
44	42, 43	syl 17	. . . . . . 7 ⊢ (𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩ → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)
45	38, 44	syl8 76	. . . . . 6 ⊢ (𝜑 → (𝑏 ∈ (Vtx‘𝐺) → ((𝑎 ∈ (Vtx‘𝐺) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)))
46	45	rexlimdv 3151	. . . . 5 ⊢ (𝜑 → (∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ∈ (Vtx‘𝐺) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → ∃𝑝 𝐹(Cycles‘𝐺)𝑝))
47	17, 46	syl5 34	. . . 4 ⊢ (𝜑 → ((𝑎 ∈ (Vtx‘𝐺) ∧ ∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → ∃𝑝 𝐹(Cycles‘𝐺)𝑝))
48	47	expd 414	. . 3 ⊢ (𝜑 → (𝑎 ∈ (Vtx‘𝐺) → (∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)))
49	48	rexlimdv 3151	. 2 ⊢ (𝜑 → (∃𝑎 ∈ (Vtx‘𝐺)∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → ∃𝑝 𝐹(Cycles‘𝐺)𝑝))
50	12, 49	mpd 15	1 ⊢ (𝜑 → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 394 ∧ w3a 1085 ∀wal 1537 = wceq 1539 ∃wex 1779 ∈ wcel 2104 ≠ wne 2938 ∀wral 3059 ∃wrex 3068 Vcvv 3472 ⊆ wss 3947 {cpr 4629 class class class wbr 5147 dom cdm 5675 Fun wfun 6536 ‘cfv 6542 Word cword 14468 ⟨“cs2 14796 ⟨“cs3 14797 Vtxcvtx 28523 iEdgciedg 28524 Edgcedg 28574 UHGraphcuhgr 28583 UMGraphcumgr 28608 Cyclesccycls 29309

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-ifp 1060 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-oadd 8472 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-dju 9898 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13489 df-fzo 13632 df-hash 14295 df-word 14469 df-concat 14525 df-s1 14550 df-s2 14803 df-s3 14804 df-edg 28575 df-uhgr 28585 df-upgr 28609 df-umgr 28610 df-wlks 29123 df-trls 29216 df-pths 29240 df-cycls 29311

This theorem is referenced by: umgr2cycl 34430

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