Theorem wlklnwwlkln2lem 26768

Description: Lemma for wlklnwwlkln2 26769 and wlklnwwlklnupgr2 26771. Formerly part of proof for wlklnwwlkln2 26769. (Contributed by Alexander van der Vekens, 21-Jul-2018.) (Revised by AV, 12-Apr-2021.)

Hypothesis

Ref	Expression
wlklnwwlkln2lem.1	⊢ (𝜑 → (𝑃 ∈ (WWalks‘𝐺) → ∃𝑓 𝑓(Walks‘𝐺)𝑃))

Assertion

Ref	Expression
wlklnwwlkln2lem	⊢ (𝜑 → (𝑃 ∈ (𝑁 WWalksN 𝐺) → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))

Distinct variable groups:   𝑓,𝐺   𝑓,𝑁   𝑃,𝑓   𝜑,𝑓

Proof of Theorem wlklnwwlkln2lem

Step	Hyp	Ref	Expression
1		eqid 2622	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
2	1	wwlknbp 26733	. . 3 ⊢ (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝐺 ∈ V ∧ 𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)))
3		iswwlksn 26730	. . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (𝑃 ∈ (𝑁 WWalksN 𝐺) ↔ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))))
4	3	adantr 481	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) ↔ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))))
5		lencl 13324	. . . . . . . . . . . . . 14 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (#‘𝑃) ∈ ℕ0)
6	5	nn0cnd 11353	. . . . . . . . . . . . 13 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (#‘𝑃) ∈ ℂ)
7	6	adantl 482	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (#‘𝑃) ∈ ℂ)
8		1cnd 10056	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 1 ∈ ℂ)
9		nn0cn 11302	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ)
10	9	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 𝑁 ∈ ℂ)
11	7, 8, 10	subadd2d 10411	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (((#‘𝑃) − 1) = 𝑁 ↔ (𝑁 + 1) = (#‘𝑃)))
12		eqcom 2629	. . . . . . . . . . 11 ⊢ ((𝑁 + 1) = (#‘𝑃) ↔ (#‘𝑃) = (𝑁 + 1))
13	11, 12	syl6rbb 277	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((#‘𝑃) = (𝑁 + 1) ↔ ((#‘𝑃) − 1) = 𝑁))
14	13	biimpcd 239	. . . . . . . . 9 ⊢ ((#‘𝑃) = (𝑁 + 1) → ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((#‘𝑃) − 1) = 𝑁))
15	14	adantl 482	. . . . . . . 8 ⊢ ((𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1)) → ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((#‘𝑃) − 1) = 𝑁))
16	15	impcom 446	. . . . . . 7 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) → ((#‘𝑃) − 1) = 𝑁)
17		wlklnwwlkln2lem.1	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑃 ∈ (WWalks‘𝐺) → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
18	17	com12 32	. . . . . . . . . . . . 13 ⊢ (𝑃 ∈ (WWalks‘𝐺) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
19	18	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1)) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
20	19	adantl 482	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
21	20	imp 445	. . . . . . . . . 10 ⊢ ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → ∃𝑓 𝑓(Walks‘𝐺)𝑃)
22		simpr 477	. . . . . . . . . . . . 13 ⊢ (((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) ∧ 𝑓(Walks‘𝐺)𝑃) → 𝑓(Walks‘𝐺)𝑃)
23		wlklenvm1 26517	. . . . . . . . . . . . 13 ⊢ (𝑓(Walks‘𝐺)𝑃 → (#‘𝑓) = ((#‘𝑃) − 1))
24	22, 23	jccir 562	. . . . . . . . . . . 12 ⊢ (((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) ∧ 𝑓(Walks‘𝐺)𝑃) → (𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = ((#‘𝑃) − 1)))
25	24	ex 450	. . . . . . . . . . 11 ⊢ ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → (𝑓(Walks‘𝐺)𝑃 → (𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = ((#‘𝑃) − 1))))
26	25	eximdv 1846	. . . . . . . . . 10 ⊢ ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → (∃𝑓 𝑓(Walks‘𝐺)𝑃 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = ((#‘𝑃) − 1))))
27	21, 26	mpd 15	. . . . . . . . 9 ⊢ ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = ((#‘𝑃) − 1)))
28		eqeq2 2633	. . . . . . . . . . 11 ⊢ (((#‘𝑃) − 1) = 𝑁 → ((#‘𝑓) = ((#‘𝑃) − 1) ↔ (#‘𝑓) = 𝑁))
29	28	anbi2d 740	. . . . . . . . . 10 ⊢ (((#‘𝑃) − 1) = 𝑁 → ((𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = ((#‘𝑃) − 1)) ↔ (𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))
30	29	exbidv 1850	. . . . . . . . 9 ⊢ (((#‘𝑃) − 1) = 𝑁 → (∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = ((#‘𝑃) − 1)) ↔ ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))
31	27, 30	syl5ib 234	. . . . . . . 8 ⊢ (((#‘𝑃) − 1) = 𝑁 → ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))
32	31	expd 452	. . . . . . 7 ⊢ (((#‘𝑃) − 1) = 𝑁 → (((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁))))
33	16, 32	mpcom 38	. . . . . 6 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1))) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))
34	33	ex 450	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((𝑃 ∈ (WWalks‘𝐺) ∧ (#‘𝑃) = (𝑁 + 1)) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁))))
35	4, 34	sylbid 230	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁))))
36	35	3adant1 1079	. . 3 ⊢ ((𝐺 ∈ V ∧ 𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁))))
37	2, 36	mpcom 38	. 2 ⊢ (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))
38	37	com12 32	1 ⊢ (𝜑 → (𝑃 ∈ (𝑁 WWalksN 𝐺) → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (#‘𝑓) = 𝑁)))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483  ∃wex 1704   ∈ wcel 1990  Vcvv 3200   class class class wbr 4653  ‘cfv 5888  (class class class)co 6650  ℂcc 9934  1c1 9937   + caddc 9939   − cmin 10266  ℕ₀cn0 11292  #chash 13117  Word cword 13291  Vtxcvtx 25874  Walkscwlks 26492  WWalkscwwlks 26717   WWalksN cwwlksn 26718

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-ifp 1013  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-map 7859  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-n0 11293  df-z 11378  df-uz 11688  df-fz 12327  df-fzo 12466  df-hash 13118  df-word 13299  df-wlks 26495  df-wwlks 26722  df-wwlksn 26723

This theorem is referenced by:  wlklnwwlkln2  26769  wlklnwwlklnupgr2  26771