Theorem wlklnwwlkln2lem 29785

Description: Lemma for wlklnwwlkln2 29786 and wlklnwwlklnupgr2 29788. Formerly part of proof for wlklnwwlkln2 29786. (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 2729	. . . 4 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
2	1	wwlknbp 29745	. . 3 ⊢ (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝐺 ∈ V ∧ 𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)))
3		iswwlksn 29741	. . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (𝑃 ∈ (𝑁 WWalksN 𝐺) ↔ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))))
4	3	adantr 480	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) ↔ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))))
5		lencl 14474	. . . . . . . . . . . . . 14 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (♯‘𝑃) ∈ ℕ0)
6	5	nn0cnd 12481	. . . . . . . . . . . . 13 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (♯‘𝑃) ∈ ℂ)
7	6	adantl 481	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (♯‘𝑃) ∈ ℂ)
8		1cnd 11145	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 1 ∈ ℂ)
9		nn0cn 12428	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ)
10	9	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → 𝑁 ∈ ℂ)
11	7, 8, 10	subadd2d 11528	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (((♯‘𝑃) − 1) = 𝑁 ↔ (𝑁 + 1) = (♯‘𝑃)))
12		eqcom 2736	. . . . . . . . . . 11 ⊢ ((𝑁 + 1) = (♯‘𝑃) ↔ (♯‘𝑃) = (𝑁 + 1))
13	11, 12	bitr2di 288	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((♯‘𝑃) = (𝑁 + 1) ↔ ((♯‘𝑃) − 1) = 𝑁))
14	13	biimpcd 249	. . . . . . . . 9 ⊢ ((♯‘𝑃) = (𝑁 + 1) → ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((♯‘𝑃) − 1) = 𝑁))
15	14	adantl 481	. . . . . . . 8 ⊢ ((𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1)) → ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → ((♯‘𝑃) − 1) = 𝑁))
16	15	impcom 407	. . . . . . 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 480	. . . . . . . . . . . 12 ⊢ ((𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1)) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
20	19	adantl 481	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))) → (𝜑 → ∃𝑓 𝑓(Walks‘𝐺)𝑃))
21	20	imp 406	. . . . . . . . . 10 ⊢ ((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))) ∧ 𝜑) → ∃𝑓 𝑓(Walks‘𝐺)𝑃)
22		simpr 484	. . . . . . . . . . . . 13 ⊢ (((((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) ∧ (𝑃 ∈ (WWalks‘𝐺) ∧ (♯‘𝑃) = (𝑁 + 1))) ∧ 𝜑) ∧ 𝑓(Walks‘𝐺)𝑃) → 𝑓(Walks‘𝐺)𝑃)
23		wlklenvm1 29525	. . . . . . . . . . . . 13 ⊢ (𝑓(Walks‘𝐺)𝑃 → (♯‘𝑓) = ((♯‘𝑃) − 1))
24	22, 23	jccir 521	. . . . . . . . . . . 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 412	. . . . . . . . . . 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 1917	. . . . . . . . . 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 2741	. . . . . . . . . . 11 ⊢ (((♯‘𝑃) − 1) = 𝑁 → ((♯‘𝑓) = ((♯‘𝑃) − 1) ↔ (♯‘𝑓) = 𝑁))
29	28	anbi2d 630	. . . . . . . . . 10 ⊢ (((♯‘𝑃) − 1) = 𝑁 → ((𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = ((♯‘𝑃) − 1)) ↔ (𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = 𝑁)))
30	29	exbidv 1921	. . . . . . . . 9 ⊢ (((♯‘𝑃) − 1) = 𝑁 → (∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = ((♯‘𝑃) − 1)) ↔ ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = 𝑁)))
31	27, 30	imbitrid 244	. . . . . . . 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 415	. . . . . . 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 412	. . . . 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 240	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑃 ∈ Word (Vtx‘𝐺)) → (𝑃 ∈ (𝑁 WWalksN 𝐺) → (𝜑 → ∃𝑓(𝑓(Walks‘𝐺)𝑃 ∧ (♯‘𝑓) = 𝑁))))
36	35	3adant1 1130	. . 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 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540  ∃wex 1779   ∈ wcel 2109  Vcvv 3444   class class class wbr 5102  ‘cfv 6499  (class class class)co 7369  ℂcc 11042  1c1 11045   + caddc 11047   − cmin 11381  ℕ₀cn0 12418  ♯chash 14271  Word cword 14454  Vtxcvtx 28899  Walkscwlks 29500  WWalkscwwlks 29728   WWalksN cwwlksn 29729

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 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5229  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382  ax-un 7691  ax-cnex 11100  ax-resscn 11101  ax-1cn 11102  ax-icn 11103  ax-addcl 11104  ax-addrcl 11105  ax-mulcl 11106  ax-mulrcl 11107  ax-mulcom 11108  ax-addass 11109  ax-mulass 11110  ax-distr 11111  ax-i2m1 11112  ax-1ne0 11113  ax-1rid 11114  ax-rnegex 11115  ax-rrecex 11116  ax-cnre 11117  ax-pre-lttri 11118  ax-pre-lttrn 11119  ax-pre-ltadd 11120  ax-pre-mulgt0 11121

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-ifp 1063  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-reu 3352  df-rab 3403  df-v 3446  df-sbc 3751  df-csb 3860  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-pss 3931  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-int 4907  df-iun 4953  df-br 5103  df-opab 5165  df-mpt 5184  df-tr 5210  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6262  df-ord 6323  df-on 6324  df-lim 6325  df-suc 6326  df-iota 6452  df-fun 6501  df-fn 6502  df-f 6503  df-f1 6504  df-fo 6505  df-f1o 6506  df-fv 6507  df-riota 7326  df-ov 7372  df-oprab 7373  df-mpo 7374  df-om 7823  df-1st 7947  df-2nd 7948  df-frecs 8237  df-wrecs 8268  df-recs 8317  df-rdg 8355  df-1o 8411  df-er 8648  df-map 8778  df-en 8896  df-dom 8897  df-sdom 8898  df-fin 8899  df-card 9868  df-pnf 11186  df-mnf 11187  df-xr 11188  df-ltxr 11189  df-le 11190  df-sub 11383  df-neg 11384  df-nn 12163  df-n0 12419  df-z 12506  df-uz 12770  df-fz 13445  df-fzo 13592  df-hash 14272  df-word 14455  df-wlks 29503  df-wwlks 29733  df-wwlksn 29734

This theorem is referenced by:  wlklnwwlkln2  29786  wlklnwwlklnupgr2  29788