umgr2cycllem - Mathbox for BTernaryTau

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Theorem umgr2cycllem 34119

Description: Lemma for umgr2cycl 34120. (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 28353	. . . . 5 ⊢ (𝐺 ∈ UMGraph → 𝐺 ∈ UHGraph)
3		umgr2cycllem.2	. . . . . 6 ⊢ 𝐼 = (iEdg‘𝐺)
4	3	uhgrfun 28315	. . . . 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 28299	. . . 4 ⊢ ((Fun 𝐼 ∧ 𝐽 ∈ dom 𝐼) → (𝐼‘𝐽) ∈ (Edg‘𝐺))
8	5, 6, 7	syl2anc 584	. . 3 ⊢ (𝜑 → (𝐼‘𝐽) ∈ (Edg‘𝐺))
9		eqid 2732	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
10		eqid 2732	. . . 4 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
11	9, 10	umgredg 28387	. . 3 ⊢ ((𝐺 ∈ UMGraph ∧ (𝐼‘𝐽) ∈ (Edg‘𝐺)) → ∃𝑎 ∈ (Vtx‘𝐺)∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}))
12	1, 8, 11	syl2anc 584	. 2 ⊢ (𝜑 → ∃𝑎 ∈ (Vtx‘𝐺)∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}))
13		ax-5 1913	. . . . . . 7 ⊢ (𝑎 ∈ (Vtx‘𝐺) → ∀𝑏 𝑎 ∈ (Vtx‘𝐺))
14		alral 3075	. . . . . . 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 3114	. . . . . 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 580	. . . . 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 2732	. . . . . . . . . . . 12 ⊢ ⟨“𝑎𝑏𝑎”⟩ = ⟨“𝑎𝑏𝑎”⟩
19		umgr2cycllem.1	. . . . . . . . . . . 12 ⊢ 𝐹 = ⟨“𝐽𝐾”⟩
20		simp2 1137	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)))
21		simp3l 1201	. . . . . . . . . . . 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 482	. . . . . . . . . . . . . 14 ⊢ ((𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → {𝑎, 𝑏} ⊆ (𝐼‘𝐽))
24	23	3ad2ant3 1135	. . . . . . . . . . . . 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 491	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
29	28	adantld 491	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (((𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → {𝑎, 𝑏} ⊆ (𝐼‘𝐾)))
30	29	3impib 1116	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → {𝑎, 𝑏} ⊆ (𝐼‘𝐾))
31	24, 30	jca 512	. . . . . . . . . . . 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 1133	. . . . . . . . . . . 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 34118	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩)
35	34	3expib 1122	. . . . . . . . . 10 ⊢ (𝜑 → (((𝑎 ∈ (Vtx‘𝐺) ∧ 𝑏 ∈ (Vtx‘𝐺)) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩))
36	35	exp4c 433	. . . . . . . . 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 423	. . . . . . 7 ⊢ (𝜑 → (𝑏 ∈ (Vtx‘𝐺) → ((𝑎 ∈ (Vtx‘𝐺) ∧ (𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏})) → 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩)))
39		s3cli 14828	. . . . . . . . 9 ⊢ ⟨“𝑎𝑏𝑎”⟩ ∈ Word V
40		breq2 5151	. . . . . . . . . 10 ⊢ (𝑝 = ⟨“𝑎𝑏𝑎”⟩ → (𝐹(Cycles‘𝐺)𝑝 ↔ 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩))
41	40	rspcev 3612	. . . . . . . . 9 ⊢ ((⟨“𝑎𝑏𝑎”⟩ ∈ Word V ∧ 𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩) → ∃𝑝 ∈ Word V𝐹(Cycles‘𝐺)𝑝)
42	39, 41	mpan 688	. . . . . . . 8 ⊢ (𝐹(Cycles‘𝐺)⟨“𝑎𝑏𝑎”⟩ → ∃𝑝 ∈ Word V𝐹(Cycles‘𝐺)𝑝)
43		rexex 3076	. . . . . . . 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 3153	. . . . 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 416	. . 3 ⊢ (𝜑 → (𝑎 ∈ (Vtx‘𝐺) → (∃𝑏 ∈ (Vtx‘𝐺)(𝑎 ≠ 𝑏 ∧ (𝐼‘𝐽) = {𝑎, 𝑏}) → ∃𝑝 𝐹(Cycles‘𝐺)𝑝)))
49	48	rexlimdv 3153	. 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 396 ∧ w3a 1087 ∀wal 1539 = wceq 1541 ∃wex 1781 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∃wrex 3070 Vcvv 3474 ⊆ wss 3947 {cpr 4629 class class class wbr 5147 dom cdm 5675 Fun wfun 6534 ‘cfv 6540 Word cword 14460 ⟨“cs2 14788 ⟨“cs3 14789 Vtxcvtx 28245 iEdgciedg 28246 Edgcedg 28296 UHGraphcuhgr 28305 UMGraphcumgr 28330 Cyclesccycls 29031

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-ifp 1062 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 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 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-oadd 8466 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-dju 9892 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-2 12271 df-3 12272 df-n0 12469 df-z 12555 df-uz 12819 df-fz 13481 df-fzo 13624 df-hash 14287 df-word 14461 df-concat 14517 df-s1 14542 df-s2 14795 df-s3 14796 df-edg 28297 df-uhgr 28307 df-upgr 28331 df-umgr 28332 df-wlks 28845 df-trls 28938 df-pths 28962 df-cycls 29033

This theorem is referenced by: umgr2cycl 34120

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