Theorem wlklnwwlkln2lem 29765

Description: Lemma for wlklnwwlkln2 29766 and wlklnwwlklnupgr2 29768. Formerly part of proof for wlklnwwlkln2 29766. (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 2725	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
2	1	wwlknbp 29725	. . 3 ⊢ (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝐺 ∈ V ∧ 𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)))
3		iswwlksn 29721	. . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (𝑃 ∈ (𝑁 WWalksN 𝐺) ↔ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))))
4	3	adantr 479	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) ↔ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))))
5		lencl 14519	. . . . . . . . . . . . . 14 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (♯‘𝑃) ∈ ℕ0)
6	5	nn0cnd 12567	. . . . . . . . . . . . 13 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (♯‘𝑃) ∈ ℂ)
7	6	adantl 480	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (♯‘𝑃) ∈ ℂ)
8		1cnd 11241	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 1 ∈ ℂ)
9		nn0cn 12515	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ)
10	9	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 𝑁 ∈ ℂ)
11	7, 8, 10	subadd2d 11622	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (((♯‘𝑃) − 1) = 𝑁 ↔ (𝑁 + 1) = (♯‘𝑃)))
12		eqcom 2732	. . . . . . . . . . 11 ⊢ ((𝑁 + 1) = (♯‘𝑃) ↔ (♯‘𝑃) = (𝑁 + 1))
13	11, 12	bitr2di 287	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((♯‘𝑃) = (𝑁 + 1) ↔ ((♯‘𝑃) − 1) = 𝑁))
14	13	biimpcd 248	. . . . . . . . 9 ⊢ ((♯‘𝑃) = (𝑁 + 1) → ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((♯‘𝑃) − 1) = 𝑁))
15	14	adantl 480	. . . . . . . 8 ⊢ ((𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1)) → ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((♯‘𝑃) − 1) = 𝑁))
16	15	impcom 406	. . . . . . 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 479	. . . . . . . . . . . 12 ⊢ ((𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1)) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
20	19	adantl 480	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
21	20	imp 405	. . . . . . . . . 10 ⊢ ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → ∃𝑓 𝑓(Walks‘𝐺)𝑃)
22		simpr 483	. . . . . . . . . . . . 13 ⊢ (((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))) ∧ 𝜑) ∧ 𝑓(Walks‘𝐺)𝑃) → 𝑓(Walks‘𝐺)𝑃)
23		wlklenvm1 29508	. . . . . . . . . . . . 13 ⊢ (𝑓(Walks‘𝐺)𝑃 → (♯‘𝑓) = ((♯‘𝑃) − 1))
24	22, 23	jccir 520	. . . . . . . . . . . 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 411	. . . . . . . . . . 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 1912	. . . . . . . . . 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 2737	. . . . . . . . . . 11 ⊢ (((♯‘𝑃) − 1) = 𝑁 → ((♯‘𝑓) = ((♯‘𝑃) − 1) ↔ (♯‘𝑓) = 𝑁))
29	28	anbi2d 628	. . . . . . . . . 10 ⊢ (((♯‘𝑃) − 1) = 𝑁 → ((𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = ((♯‘𝑃) − 1)) ↔ (𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = 𝑁)))
30	29	exbidv 1916	. . . . . . . . 9 ⊢ (((♯‘𝑃) − 1) = 𝑁 → (∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = ((♯‘𝑃) − 1)) ↔ ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = 𝑁)))
31	27, 30	imbitrid 243	. . . . . . . 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 414	. . . . . . 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 411	. . . . 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 239	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = 𝑁))))
36	35	3adant1 1127	. . 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 205   ∧ wa 394   ∧ w3a 1084   = wceq 1533  ∃wex 1773   ∈ wcel 2098  Vcvv 3461   class class class wbr 5149  ‘cfv 6549  (class class class)co 7419  ℂcc 11138  1c1 11141   + caddc 11143   − cmin 11476  ℕ₀cn0 12505  ♯chash 14325  Word cword 14500  Vtxcvtx 28881  Walkscwlks 29482  WWalkscwwlks 29708   WWalksN cwwlksn 29709

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2166  ax-ext 2696  ax-rep 5286  ax-sep 5300  ax-nul 5307  ax-pow 5365  ax-pr 5429  ax-un 7741  ax-cnex 11196  ax-resscn 11197  ax-1cn 11198  ax-icn 11199  ax-addcl 11200  ax-addrcl 11201  ax-mulcl 11202  ax-mulrcl 11203  ax-mulcom 11204  ax-addass 11205  ax-mulass 11206  ax-distr 11207  ax-i2m1 11208  ax-1ne0 11209  ax-1rid 11210  ax-rnegex 11211  ax-rrecex 11212  ax-cnre 11213  ax-pre-lttri 11214  ax-pre-lttrn 11215  ax-pre-ltadd 11216  ax-pre-mulgt0 11217

This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-ifp 1061  df-3or 1085  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2703  df-cleq 2717  df-clel 2802  df-nfc 2877  df-ne 2930  df-nel 3036  df-ral 3051  df-rex 3060  df-reu 3364  df-rab 3419  df-v 3463  df-sbc 3774  df-csb 3890  df-dif 3947  df-un 3949  df-in 3951  df-ss 3961  df-pss 3964  df-nul 4323  df-if 4531  df-pw 4606  df-sn 4631  df-pr 4633  df-op 4637  df-uni 4910  df-int 4951  df-iun 4999  df-br 5150  df-opab 5212  df-mpt 5233  df-tr 5267  df-id 5576  df-eprel 5582  df-po 5590  df-so 5591  df-fr 5633  df-we 5635  df-xp 5684  df-rel 5685  df-cnv 5686  df-co 5687  df-dm 5688  df-rn 5689  df-res 5690  df-ima 5691  df-pred 6307  df-ord 6374  df-on 6375  df-lim 6376  df-suc 6377  df-iota 6501  df-fun 6551  df-fn 6552  df-f 6553  df-f1 6554  df-fo 6555  df-f1o 6556  df-fv 6557  df-riota 7375  df-ov 7422  df-oprab 7423  df-mpo 7424  df-om 7872  df-1st 7994  df-2nd 7995  df-frecs 8287  df-wrecs 8318  df-recs 8392  df-rdg 8431  df-1o 8487  df-er 8725  df-map 8847  df-en 8965  df-dom 8966  df-sdom 8967  df-fin 8968  df-card 9964  df-pnf 11282  df-mnf 11283  df-xr 11284  df-ltxr 11285  df-le 11286  df-sub 11478  df-neg 11479  df-nn 12246  df-n0 12506  df-z 12592  df-uz 12856  df-fz 13520  df-fzo 13663  df-hash 14326  df-word 14501  df-wlks 29485  df-wwlks 29713  df-wwlksn 29714

This theorem is referenced by:  wlklnwwlkln2  29766  wlklnwwlklnupgr2  29768