Theorem repsdf2 13376

Description: Alternative definition of a "repeated symbol word". (Contributed by AV, 7-Nov-2018.)

Assertion

Ref	Expression
repsdf2	⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊 = (𝑆 repeatS 𝑁) ↔ (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁 ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆)))

Distinct variable groups:   𝑖,𝑁   𝑆,𝑖   𝑖,𝑊

Allowed substitution hint:   𝑉(𝑖)

Proof of Theorem repsdf2

Step	Hyp	Ref	Expression
1		repsconst 13370	. . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑆 repeatS 𝑁) = ((0..^𝑁) × {𝑆}))
2	1	eqeq2d 2620	. 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊 = (𝑆 repeatS 𝑁) ↔ 𝑊 = ((0..^𝑁) × {𝑆})))
3		fconst2g 6373	. . 3 ⊢ (𝑆 ∈ 𝑉 → (𝑊:(0..^𝑁)⟶{𝑆} ↔ 𝑊 = ((0..^𝑁) × {𝑆})))
4	3	adantr 480	. 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊:(0..^𝑁)⟶{𝑆} ↔ 𝑊 = ((0..^𝑁) × {𝑆})))
5		fconstfv 6381	. . . . . . . . 9 ⊢ (𝑊:(0..^𝑁)⟶{𝑆} ↔ (𝑊 Fn (0..^𝑁) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆))
6		simpr 476	. . . . . . . . . . . . 13 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ 𝑊:(0..^𝑁)⟶{𝑆}) → 𝑊:(0..^𝑁)⟶{𝑆})
7		snssi 4280	. . . . . . . . . . . . . . 15 ⊢ (𝑆 ∈ 𝑉 → {𝑆} ⊆ 𝑉)
8	7	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → {𝑆} ⊆ 𝑉)
9	8	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ 𝑊:(0..^𝑁)⟶{𝑆}) → {𝑆} ⊆ 𝑉)
10	6, 9	jca 553	. . . . . . . . . . . 12 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ 𝑊:(0..^𝑁)⟶{𝑆}) → (𝑊:(0..^𝑁)⟶{𝑆} ∧ {𝑆} ⊆ 𝑉))
11		fss 5969	. . . . . . . . . . . 12 ⊢ ((𝑊:(0..^𝑁)⟶{𝑆} ∧ {𝑆} ⊆ 𝑉) → 𝑊:(0..^𝑁)⟶𝑉)
12		iswrdi 13164	. . . . . . . . . . . 12 ⊢ (𝑊:(0..^𝑁)⟶𝑉 → 𝑊 ∈ Word 𝑉)
13	10, 11, 12	3syl 18	. . . . . . . . . . 11 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ 𝑊:(0..^𝑁)⟶{𝑆}) → 𝑊 ∈ Word 𝑉)
14		ffn 5958	. . . . . . . . . . . . . . 15 ⊢ (𝑊:(0..^𝑁)⟶{𝑆} → 𝑊 Fn (0..^𝑁))
15		ffzo0hash 13090	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑊 Fn (0..^𝑁)) → (#‘𝑊) = 𝑁)
16	15	expcom 450	. . . . . . . . . . . . . . 15 ⊢ (𝑊 Fn (0..^𝑁) → (𝑁 ∈ ℕ0 → (#‘𝑊) = 𝑁))
17	14, 16	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝑊:(0..^𝑁)⟶{𝑆} → (𝑁 ∈ ℕ0 → (#‘𝑊) = 𝑁))
18	17	com12 32	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ0 → (𝑊:(0..^𝑁)⟶{𝑆} → (#‘𝑊) = 𝑁))
19	18	adantl 481	. . . . . . . . . . . 12 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊:(0..^𝑁)⟶{𝑆} → (#‘𝑊) = 𝑁))
20	19	imp 444	. . . . . . . . . . 11 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ 𝑊:(0..^𝑁)⟶{𝑆}) → (#‘𝑊) = 𝑁)
21	13, 20	jca 553	. . . . . . . . . 10 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ 𝑊:(0..^𝑁)⟶{𝑆}) → (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁))
22	21	ex 449	. . . . . . . . 9 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊:(0..^𝑁)⟶{𝑆} → (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁)))
23	5, 22	syl5bir 232	. . . . . . . 8 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → ((𝑊 Fn (0..^𝑁) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆) → (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁)))
24	23	expcomd 453	. . . . . . 7 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆 → (𝑊 Fn (0..^𝑁) → (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁))))
25	24	imp 444	. . . . . 6 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆) → (𝑊 Fn (0..^𝑁) → (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁)))
26		wrdf 13165	. . . . . . . . . 10 ⊢ (𝑊 ∈ Word 𝑉 → 𝑊:(0..^(#‘𝑊))⟶𝑉)
27		ffn 5958	. . . . . . . . . 10 ⊢ (𝑊:(0..^(#‘𝑊))⟶𝑉 → 𝑊 Fn (0..^(#‘𝑊)))
28		oveq2 6557	. . . . . . . . . . . . . 14 ⊢ ((#‘𝑊) = 𝑁 → (0..^(#‘𝑊)) = (0..^𝑁))
29	28	fneq2d 5896	. . . . . . . . . . . . 13 ⊢ ((#‘𝑊) = 𝑁 → (𝑊 Fn (0..^(#‘𝑊)) ↔ 𝑊 Fn (0..^𝑁)))
30	29	biimpd 218	. . . . . . . . . . . 12 ⊢ ((#‘𝑊) = 𝑁 → (𝑊 Fn (0..^(#‘𝑊)) → 𝑊 Fn (0..^𝑁)))
31	30	a1d 25	. . . . . . . . . . 11 ⊢ ((#‘𝑊) = 𝑁 → ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊 Fn (0..^(#‘𝑊)) → 𝑊 Fn (0..^𝑁))))
32	31	com13 86	. . . . . . . . . 10 ⊢ (𝑊 Fn (0..^(#‘𝑊)) → ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → ((#‘𝑊) = 𝑁 → 𝑊 Fn (0..^𝑁))))
33	26, 27, 32	3syl 18	. . . . . . . . 9 ⊢ (𝑊 ∈ Word 𝑉 → ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → ((#‘𝑊) = 𝑁 → 𝑊 Fn (0..^𝑁))))
34	33	com12 32	. . . . . . . 8 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊 ∈ Word 𝑉 → ((#‘𝑊) = 𝑁 → 𝑊 Fn (0..^𝑁))))
35	34	impd 446	. . . . . . 7 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → ((𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁) → 𝑊 Fn (0..^𝑁)))
36	35	adantr 480	. . . . . 6 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆) → ((𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁) → 𝑊 Fn (0..^𝑁)))
37	25, 36	impbid 201	. . . . 5 ⊢ (((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆) → (𝑊 Fn (0..^𝑁) ↔ (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁)))
38	37	ex 449	. . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆 → (𝑊 Fn (0..^𝑁) ↔ (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁))))
39	38	pm5.32rd 670	. . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → ((𝑊 Fn (0..^𝑁) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆) ↔ ((𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆)))
40		df-3an 1033	. . 3 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁 ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆) ↔ ((𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁) ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆))
41	39, 5, 40	3bitr4g 302	. 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊:(0..^𝑁)⟶{𝑆} ↔ (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁 ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆)))
42	2, 4, 41	3bitr2d 295	1 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑊 = (𝑆 repeatS 𝑁) ↔ (𝑊 ∈ Word 𝑉 ∧ (#‘𝑊) = 𝑁 ∧ ∀𝑖 ∈ (0..^𝑁)(𝑊‘𝑖) = 𝑆)))

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ∀wral 2896   ⊆ wss 3540  {csn 4125   × cxp 5036   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549  0cc0 9815  ℕ₀cn0 11169  ..^cfzo 12334  #chash 12979  Word cword 13146   repeatS creps 13153

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-card 8648  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-n0 11170  df-z 11255  df-uz 11564  df-fz 12198  df-fzo 12335  df-hash 12980  df-word 13154  df-reps 13161

This theorem is referenced by:  repswsymball  13377  repswsymballbi  13378  cshwrepswhash1  15647