Theorem repswpfx 41436

Description: A prefix of a repeated symbol word is a repeated symbol word. (Contributed by AV, 11-May-2020.)

Assertion

Ref	Expression
repswpfx	⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → ((𝑆 repeatS 𝑁) prefix 𝐿) = (𝑆 repeatS 𝐿))

Proof of Theorem repswpfx

Dummy variable 𝑖 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		repsw 13522	. . . . 5 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑆 repeatS 𝑁) ∈ Word 𝑉)
2	1	3adant3 1081	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (𝑆 repeatS 𝑁) ∈ Word 𝑉)
3		repswlen 13523	. . . . . . . 8 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (#‘(𝑆 repeatS 𝑁)) = 𝑁)
4	3	eqcomd 2628	. . . . . . 7 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → 𝑁 = (#‘(𝑆 repeatS 𝑁)))
5	4	oveq2d 6666	. . . . . 6 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (0...𝑁) = (0...(#‘(𝑆 repeatS 𝑁))))
6	5	eleq2d 2687	. . . . 5 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝐿 ∈ (0...𝑁) ↔ 𝐿 ∈ (0...(#‘(𝑆 repeatS 𝑁)))))
7	6	biimp3a 1432	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → 𝐿 ∈ (0...(#‘(𝑆 repeatS 𝑁))))
8		pfxlen 41391	. . . 4 ⊢ (((𝑆 repeatS 𝑁) ∈ Word 𝑉 ∧ 𝐿 ∈ (0...(#‘(𝑆 repeatS 𝑁)))) → (#‘((𝑆 repeatS 𝑁) prefix 𝐿)) = 𝐿)
9	2, 7, 8	syl2anc 693	. . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (#‘((𝑆 repeatS 𝑁) prefix 𝐿)) = 𝐿)
10		elfznn0 12433	. . . . . 6 ⊢ (𝐿 ∈ (0...𝑁) → 𝐿 ∈ ℕ0)
11	10	anim2i 593	. . . . 5 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐿 ∈ (0...𝑁)) → (𝑆 ∈ 𝑉 ∧ 𝐿 ∈ ℕ0))
12	11	3adant2 1080	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (𝑆 ∈ 𝑉 ∧ 𝐿 ∈ ℕ0))
13		repswlen 13523	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐿 ∈ ℕ0) → (#‘(𝑆 repeatS 𝐿)) = 𝐿)
14	12, 13	syl 17	. . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (#‘(𝑆 repeatS 𝐿)) = 𝐿)
15	9, 14	eqtr4d 2659	. 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (#‘((𝑆 repeatS 𝑁) prefix 𝐿)) = (#‘(𝑆 repeatS 𝐿)))
16		simpl1 1064	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → 𝑆 ∈ 𝑉)
17		simpl2 1065	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → 𝑁 ∈ ℕ0)
18		elfzuz3 12339	. . . . . . . . 9 ⊢ (𝐿 ∈ (0...𝑁) → 𝑁 ∈ (ℤ≥‘𝐿))
19	18	3ad2ant3 1084	. . . . . . . 8 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → 𝑁 ∈ (ℤ≥‘𝐿))
20	9	fveq2d 6195	. . . . . . . 8 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (ℤ≥‘(#‘((𝑆 repeatS 𝑁) prefix 𝐿))) = (ℤ≥‘𝐿))
21	19, 20	eleqtrrd 2704	. . . . . . 7 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → 𝑁 ∈ (ℤ≥‘(#‘((𝑆 repeatS 𝑁) prefix 𝐿))))
22		fzoss2 12496	. . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘(#‘((𝑆 repeatS 𝑁) prefix 𝐿))) → (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿))) ⊆ (0..^𝑁))
23	21, 22	syl 17	. . . . . 6 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿))) ⊆ (0..^𝑁))
24	23	sselda 3603	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → 𝑖 ∈ (0..^𝑁))
25		repswsymb 13521	. . . . 5 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑆 repeatS 𝑁)‘𝑖) = 𝑆)
26	16, 17, 24, 25	syl3anc 1326	. . . 4 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → ((𝑆 repeatS 𝑁)‘𝑖) = 𝑆)
27	2	adantr 481	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → (𝑆 repeatS 𝑁) ∈ Word 𝑉)
28	7	adantr 481	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → 𝐿 ∈ (0...(#‘(𝑆 repeatS 𝑁))))
29	9	oveq2d 6666	. . . . . . 7 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿))) = (0..^𝐿))
30	29	eleq2d 2687	. . . . . 6 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿))) ↔ 𝑖 ∈ (0..^𝐿)))
31	30	biimpa 501	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → 𝑖 ∈ (0..^𝐿))
32		pfxfv 41399	. . . . 5 ⊢ (((𝑆 repeatS 𝑁) ∈ Word 𝑉 ∧ 𝐿 ∈ (0...(#‘(𝑆 repeatS 𝑁))) ∧ 𝑖 ∈ (0..^𝐿)) → (((𝑆 repeatS 𝑁) prefix 𝐿)‘𝑖) = ((𝑆 repeatS 𝑁)‘𝑖))
33	27, 28, 31, 32	syl3anc 1326	. . . 4 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → (((𝑆 repeatS 𝑁) prefix 𝐿)‘𝑖) = ((𝑆 repeatS 𝑁)‘𝑖))
34	10	3ad2ant3 1084	. . . . . 6 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → 𝐿 ∈ ℕ0)
35	34	adantr 481	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → 𝐿 ∈ ℕ0)
36		repswsymb 13521	. . . . 5 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐿 ∈ ℕ0 ∧ 𝑖 ∈ (0..^𝐿)) → ((𝑆 repeatS 𝐿)‘𝑖) = 𝑆)
37	16, 35, 31, 36	syl3anc 1326	. . . 4 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → ((𝑆 repeatS 𝐿)‘𝑖) = 𝑆)
38	26, 33, 37	3eqtr4d 2666	. . 3 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) ∧ 𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))) → (((𝑆 repeatS 𝑁) prefix 𝐿)‘𝑖) = ((𝑆 repeatS 𝐿)‘𝑖))
39	38	ralrimiva 2966	. 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → ∀𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))(((𝑆 repeatS 𝑁) prefix 𝐿)‘𝑖) = ((𝑆 repeatS 𝐿)‘𝑖))
40		pfxcl 41386	. . . 4 ⊢ ((𝑆 repeatS 𝑁) ∈ Word 𝑉 → ((𝑆 repeatS 𝑁) prefix 𝐿) ∈ Word 𝑉)
41	2, 40	syl 17	. . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → ((𝑆 repeatS 𝑁) prefix 𝐿) ∈ Word 𝑉)
42		repsw 13522	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐿 ∈ ℕ0) → (𝑆 repeatS 𝐿) ∈ Word 𝑉)
43	12, 42	syl 17	. . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (𝑆 repeatS 𝐿) ∈ Word 𝑉)
44		eqwrd 13346	. . 3 ⊢ ((((𝑆 repeatS 𝑁) prefix 𝐿) ∈ Word 𝑉 ∧ (𝑆 repeatS 𝐿) ∈ Word 𝑉) → (((𝑆 repeatS 𝑁) prefix 𝐿) = (𝑆 repeatS 𝐿) ↔ ((#‘((𝑆 repeatS 𝑁) prefix 𝐿)) = (#‘(𝑆 repeatS 𝐿)) ∧ ∀𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))(((𝑆 repeatS 𝑁) prefix 𝐿)‘𝑖) = ((𝑆 repeatS 𝐿)‘𝑖))))
45	41, 43, 44	syl2anc 693	. 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → (((𝑆 repeatS 𝑁) prefix 𝐿) = (𝑆 repeatS 𝐿) ↔ ((#‘((𝑆 repeatS 𝑁) prefix 𝐿)) = (#‘(𝑆 repeatS 𝐿)) ∧ ∀𝑖 ∈ (0..^(#‘((𝑆 repeatS 𝑁) prefix 𝐿)))(((𝑆 repeatS 𝑁) prefix 𝐿)‘𝑖) = ((𝑆 repeatS 𝐿)‘𝑖))))
46	15, 39, 45	mpbir2and 957	1 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ 𝐿 ∈ (0...𝑁)) → ((𝑆 repeatS 𝑁) prefix 𝐿) = (𝑆 repeatS 𝐿))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ∀wral 2912   ⊆ wss 3574  ‘cfv 5888  (class class class)co 6650  0cc0 9936  ℕ₀cn0 11292  ℤ_≥cuz 11687  ...cfz 12326  ..^cfzo 12465  #chash 13117  Word cword 13291   repeatS creps 13298   prefix cpfx 41381

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-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-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-substr 13303  df-reps 13306  df-pfx 41382

This theorem is referenced by: (None)