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Theorem efgsrel 19643

Description: The start and end of any extension sequence are related (i.e. evaluate to the same element of the quotient group to be created). (Contributed by Mario Carneiro, 1-Oct-2015.)

**Hypotheses**
Ref	Expression
efgval.w	⊢ 𝑊 = ( I ‘Word (𝐼 × 2_o))
efgval.r	⊢ ∼ = ( ~_FG ‘𝐼)
efgval2.m	⊢ 𝑀 = (𝑦 ∈ 𝐼, 𝑧 ∈ 2_o ↦ ⟨𝑦, (1_o ∖ 𝑧)⟩)
efgval2.t	⊢ 𝑇 = (𝑣 ∈ 𝑊 ↦ (𝑛 ∈ (0...(♯‘𝑣)), 𝑤 ∈ (𝐼 × 2_o) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤(𝑀‘𝑤)”⟩⟩)))
efgred.d	⊢ 𝐷 = (𝑊 ∖ ∪ 𝑥 ∈ 𝑊 ran (𝑇‘𝑥))
efgred.s	⊢ 𝑆 = (𝑚 ∈ {𝑡 ∈ (Word 𝑊 ∖ {∅}) ∣ ((𝑡‘0) ∈ 𝐷 ∧ ∀𝑘 ∈ (1..^(♯‘𝑡))(𝑡‘𝑘) ∈ ran (𝑇‘(𝑡‘(𝑘 − 1))))} ↦ (𝑚‘((♯‘𝑚) − 1)))

**Assertion**
Ref	Expression
efgsrel	⊢ (𝐹 ∈ dom 𝑆 → (𝐹‘0) ∼ (𝑆‘𝐹))

Distinct variable groups: 𝑦,𝑧 𝑡,𝑛,𝑣,𝑤,𝑦,𝑧,𝑚,𝑥 𝑚,𝑀 𝑥,𝑛,𝑀,𝑡,𝑣,𝑤 𝑘,𝑚,𝑡,𝑥,𝑇 𝑘,𝑛,𝑣,𝑤,𝑦,𝑧,𝑊,𝑚,𝑡,𝑥 ∼ ,𝑚,𝑡,𝑥,𝑦,𝑧 𝑚,𝐼,𝑛,𝑡,𝑣,𝑤,𝑥,𝑦,𝑧 𝐷,𝑚,𝑡 Allowed substitution hints: 𝐷(𝑥,𝑦,𝑧,𝑤,𝑣,𝑘,𝑛) ∼ (𝑤,𝑣,𝑘,𝑛) 𝑆(𝑥,𝑦,𝑧,𝑤,𝑣,𝑡,𝑘,𝑚,𝑛) 𝑇(𝑦,𝑧,𝑤,𝑣,𝑛) 𝐹(𝑥,𝑦,𝑧,𝑤,𝑣,𝑡,𝑘,𝑚,𝑛) 𝐼(𝑘) 𝑀(𝑦,𝑧,𝑘)

Proof of Theorem efgsrel Dummy variables 𝑎 𝑖 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		efgval.w	. . . . . 6 ⊢ 𝑊 = ( I ‘Word (𝐼 × 2_o))
2		efgval.r	. . . . . 6 ⊢ ∼ = ( ~_FG ‘𝐼)
3		efgval2.m	. . . . . 6 ⊢ 𝑀 = (𝑦 ∈ 𝐼, 𝑧 ∈ 2_o ↦ ⟨𝑦, (1_o ∖ 𝑧)⟩)
4		efgval2.t	. . . . . 6 ⊢ 𝑇 = (𝑣 ∈ 𝑊 ↦ (𝑛 ∈ (0...(♯‘𝑣)), 𝑤 ∈ (𝐼 × 2_o) ↦ (𝑣 splice ⟨𝑛, 𝑛, ⟨“𝑤(𝑀‘𝑤)”⟩⟩)))
5		efgred.d	. . . . . 6 ⊢ 𝐷 = (𝑊 ∖ ∪ 𝑥 ∈ 𝑊 ran (𝑇‘𝑥))
6		efgred.s	. . . . . 6 ⊢ 𝑆 = (𝑚 ∈ {𝑡 ∈ (Word 𝑊 ∖ {∅}) ∣ ((𝑡‘0) ∈ 𝐷 ∧ ∀𝑘 ∈ (1..^(♯‘𝑡))(𝑡‘𝑘) ∈ ran (𝑇‘(𝑡‘(𝑘 − 1))))} ↦ (𝑚‘((♯‘𝑚) − 1)))
7	1, 2, 3, 4, 5, 6	efgsdm 19639	. . . . 5 ⊢ (𝐹 ∈ dom 𝑆 ↔ (𝐹 ∈ (Word 𝑊 ∖ {∅}) ∧ (𝐹‘0) ∈ 𝐷 ∧ ∀𝑎 ∈ (1..^(♯‘𝐹))(𝐹‘𝑎) ∈ ran (𝑇‘(𝐹‘(𝑎 − 1)))))
8	7	simp1bi 1145	. . . 4 ⊢ (𝐹 ∈ dom 𝑆 → 𝐹 ∈ (Word 𝑊 ∖ {∅}))
9		eldifsn 4790	. . . . 5 ⊢ (𝐹 ∈ (Word 𝑊 ∖ {∅}) ↔ (𝐹 ∈ Word 𝑊 ∧ 𝐹 ≠ ∅))
10		lennncl 14488	. . . . 5 ⊢ ((𝐹 ∈ Word 𝑊 ∧ 𝐹 ≠ ∅) → (♯‘𝐹) ∈ ℕ)
11	9, 10	sylbi 216	. . . 4 ⊢ (𝐹 ∈ (Word 𝑊 ∖ {∅}) → (♯‘𝐹) ∈ ℕ)
12		fzo0end 13728	. . . 4 ⊢ ((♯‘𝐹) ∈ ℕ → ((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹)))
13	8, 11, 12	3syl 18	. . 3 ⊢ (𝐹 ∈ dom 𝑆 → ((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹)))
14		nnm1nn0 12517	. . . . 5 ⊢ ((♯‘𝐹) ∈ ℕ → ((♯‘𝐹) − 1) ∈ ℕ₀)
15	8, 11, 14	3syl 18	. . . 4 ⊢ (𝐹 ∈ dom 𝑆 → ((♯‘𝐹) − 1) ∈ ℕ₀)
16		eleq1 2821	. . . . . . 7 ⊢ (𝑎 = 0 → (𝑎 ∈ (0..^(♯‘𝐹)) ↔ 0 ∈ (0..^(♯‘𝐹))))
17		fveq2 6891	. . . . . . . 8 ⊢ (𝑎 = 0 → (𝐹‘𝑎) = (𝐹‘0))
18	17	breq2d 5160	. . . . . . 7 ⊢ (𝑎 = 0 → ((𝐹‘0) ∼ (𝐹‘𝑎) ↔ (𝐹‘0) ∼ (𝐹‘0)))
19	16, 18	imbi12d 344	. . . . . 6 ⊢ (𝑎 = 0 → ((𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎)) ↔ (0 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘0))))
20	19	imbi2d 340	. . . . 5 ⊢ (𝑎 = 0 → ((𝐹 ∈ dom 𝑆 → (𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎))) ↔ (𝐹 ∈ dom 𝑆 → (0 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘0)))))
21		eleq1 2821	. . . . . . 7 ⊢ (𝑎 = 𝑖 → (𝑎 ∈ (0..^(♯‘𝐹)) ↔ 𝑖 ∈ (0..^(♯‘𝐹))))
22		fveq2 6891	. . . . . . . 8 ⊢ (𝑎 = 𝑖 → (𝐹‘𝑎) = (𝐹‘𝑖))
23	22	breq2d 5160	. . . . . . 7 ⊢ (𝑎 = 𝑖 → ((𝐹‘0) ∼ (𝐹‘𝑎) ↔ (𝐹‘0) ∼ (𝐹‘𝑖)))
24	21, 23	imbi12d 344	. . . . . 6 ⊢ (𝑎 = 𝑖 → ((𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎)) ↔ (𝑖 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖))))
25	24	imbi2d 340	. . . . 5 ⊢ (𝑎 = 𝑖 → ((𝐹 ∈ dom 𝑆 → (𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎))) ↔ (𝐹 ∈ dom 𝑆 → (𝑖 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖)))))
26		eleq1 2821	. . . . . . 7 ⊢ (𝑎 = (𝑖 + 1) → (𝑎 ∈ (0..^(♯‘𝐹)) ↔ (𝑖 + 1) ∈ (0..^(♯‘𝐹))))
27		fveq2 6891	. . . . . . . 8 ⊢ (𝑎 = (𝑖 + 1) → (𝐹‘𝑎) = (𝐹‘(𝑖 + 1)))
28	27	breq2d 5160	. . . . . . 7 ⊢ (𝑎 = (𝑖 + 1) → ((𝐹‘0) ∼ (𝐹‘𝑎) ↔ (𝐹‘0) ∼ (𝐹‘(𝑖 + 1))))
29	26, 28	imbi12d 344	. . . . . 6 ⊢ (𝑎 = (𝑖 + 1) → ((𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎)) ↔ ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1)))))
30	29	imbi2d 340	. . . . 5 ⊢ (𝑎 = (𝑖 + 1) → ((𝐹 ∈ dom 𝑆 → (𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎))) ↔ (𝐹 ∈ dom 𝑆 → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1))))))
31		eleq1 2821	. . . . . . 7 ⊢ (𝑎 = ((♯‘𝐹) − 1) → (𝑎 ∈ (0..^(♯‘𝐹)) ↔ ((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹))))
32		fveq2 6891	. . . . . . . 8 ⊢ (𝑎 = ((♯‘𝐹) − 1) → (𝐹‘𝑎) = (𝐹‘((♯‘𝐹) − 1)))
33	32	breq2d 5160	. . . . . . 7 ⊢ (𝑎 = ((♯‘𝐹) − 1) → ((𝐹‘0) ∼ (𝐹‘𝑎) ↔ (𝐹‘0) ∼ (𝐹‘((♯‘𝐹) − 1))))
34	31, 33	imbi12d 344	. . . . . 6 ⊢ (𝑎 = ((♯‘𝐹) − 1) → ((𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎)) ↔ (((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘((♯‘𝐹) − 1)))))
35	34	imbi2d 340	. . . . 5 ⊢ (𝑎 = ((♯‘𝐹) − 1) → ((𝐹 ∈ dom 𝑆 → (𝑎 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑎))) ↔ (𝐹 ∈ dom 𝑆 → (((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘((♯‘𝐹) − 1))))))
36	1, 2	efger 19627	. . . . . . . 8 ⊢ ∼ Er 𝑊
37	36	a1i 11	. . . . . . 7 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 0 ∈ (0..^(♯‘𝐹))) → ∼ Er 𝑊)
38		eldifi 4126	. . . . . . . . 9 ⊢ (𝐹 ∈ (Word 𝑊 ∖ {∅}) → 𝐹 ∈ Word 𝑊)
39		wrdf 14473	. . . . . . . . 9 ⊢ (𝐹 ∈ Word 𝑊 → 𝐹:(0..^(♯‘𝐹))⟶𝑊)
40	8, 38, 39	3syl 18	. . . . . . . 8 ⊢ (𝐹 ∈ dom 𝑆 → 𝐹:(0..^(♯‘𝐹))⟶𝑊)
41	40	ffvelcdmda 7086	. . . . . . 7 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 0 ∈ (0..^(♯‘𝐹))) → (𝐹‘0) ∈ 𝑊)
42	37, 41	erref 8725	. . . . . 6 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 0 ∈ (0..^(♯‘𝐹))) → (𝐹‘0) ∼ (𝐹‘0))
43	42	ex 413	. . . . 5 ⊢ (𝐹 ∈ dom 𝑆 → (0 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘0)))
44		elnn0uz 12871	. . . . . . . . . . . 12 ⊢ (𝑖 ∈ ℕ₀ ↔ 𝑖 ∈ (ℤ_≥‘0))
45		peano2fzor 13743	. . . . . . . . . . . 12 ⊢ ((𝑖 ∈ (ℤ_≥‘0) ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → 𝑖 ∈ (0..^(♯‘𝐹)))
46	44, 45	sylanb 581	. . . . . . . . . . 11 ⊢ ((𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → 𝑖 ∈ (0..^(♯‘𝐹)))
47	46	3adant1 1130	. . . . . . . . . 10 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → 𝑖 ∈ (0..^(♯‘𝐹)))
48	47	3expia 1121	. . . . . . . . 9 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀) → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → 𝑖 ∈ (0..^(♯‘𝐹))))
49	48	imim1d 82	. . . . . . . 8 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀) → ((𝑖 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖)) → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖))))
50	40	3ad2ant1 1133	. . . . . . . . . . . . 13 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → 𝐹:(0..^(♯‘𝐹))⟶𝑊)
51	50, 47	ffvelcdmd 7087	. . . . . . . . . . . 12 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝐹‘𝑖) ∈ 𝑊)
52		fvoveq1 7434	. . . . . . . . . . . . . . . . 17 ⊢ (𝑎 = (𝑖 + 1) → (𝐹‘(𝑎 − 1)) = (𝐹‘((𝑖 + 1) − 1)))
53	52	fveq2d 6895	. . . . . . . . . . . . . . . 16 ⊢ (𝑎 = (𝑖 + 1) → (𝑇‘(𝐹‘(𝑎 − 1))) = (𝑇‘(𝐹‘((𝑖 + 1) − 1))))
54	53	rneqd 5937	. . . . . . . . . . . . . . 15 ⊢ (𝑎 = (𝑖 + 1) → ran (𝑇‘(𝐹‘(𝑎 − 1))) = ran (𝑇‘(𝐹‘((𝑖 + 1) − 1))))
55	27, 54	eleq12d 2827	. . . . . . . . . . . . . 14 ⊢ (𝑎 = (𝑖 + 1) → ((𝐹‘𝑎) ∈ ran (𝑇‘(𝐹‘(𝑎 − 1))) ↔ (𝐹‘(𝑖 + 1)) ∈ ran (𝑇‘(𝐹‘((𝑖 + 1) − 1)))))
56	7	simp3bi 1147	. . . . . . . . . . . . . . 15 ⊢ (𝐹 ∈ dom 𝑆 → ∀𝑎 ∈ (1..^(♯‘𝐹))(𝐹‘𝑎) ∈ ran (𝑇‘(𝐹‘(𝑎 − 1))))
57	56	3ad2ant1 1133	. . . . . . . . . . . . . 14 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → ∀𝑎 ∈ (1..^(♯‘𝐹))(𝐹‘𝑎) ∈ ran (𝑇‘(𝐹‘(𝑎 − 1))))
58		nn0p1nn 12515	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 ∈ ℕ₀ → (𝑖 + 1) ∈ ℕ)
59	58	3ad2ant2 1134	. . . . . . . . . . . . . . . 16 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝑖 + 1) ∈ ℕ)
60		nnuz 12869	. . . . . . . . . . . . . . . 16 ⊢ ℕ = (ℤ_≥‘1)
61	59, 60	eleqtrdi 2843	. . . . . . . . . . . . . . 15 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝑖 + 1) ∈ (ℤ_≥‘1))
62		elfzolt2b 13647	. . . . . . . . . . . . . . . 16 ⊢ ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝑖 + 1) ∈ ((𝑖 + 1)..^(♯‘𝐹)))
63	62	3ad2ant3 1135	. . . . . . . . . . . . . . 15 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝑖 + 1) ∈ ((𝑖 + 1)..^(♯‘𝐹)))
64		elfzo3 13653	. . . . . . . . . . . . . . 15 ⊢ ((𝑖 + 1) ∈ (1..^(♯‘𝐹)) ↔ ((𝑖 + 1) ∈ (ℤ_≥‘1) ∧ (𝑖 + 1) ∈ ((𝑖 + 1)..^(♯‘𝐹))))
65	61, 63, 64	sylanbrc 583	. . . . . . . . . . . . . 14 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝑖 + 1) ∈ (1..^(♯‘𝐹)))
66	55, 57, 65	rspcdva 3613	. . . . . . . . . . . . 13 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝐹‘(𝑖 + 1)) ∈ ran (𝑇‘(𝐹‘((𝑖 + 1) − 1))))
67		nn0cn 12486	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 ∈ ℕ₀ → 𝑖 ∈ ℂ)
68	67	3ad2ant2 1134	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → 𝑖 ∈ ℂ)
69		ax-1cn 11170	. . . . . . . . . . . . . . . . 17 ⊢ 1 ∈ ℂ
70		pncan 11470	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑖 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑖 + 1) − 1) = 𝑖)
71	68, 69, 70	sylancl 586	. . . . . . . . . . . . . . . 16 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → ((𝑖 + 1) − 1) = 𝑖)
72	71	fveq2d 6895	. . . . . . . . . . . . . . 15 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝐹‘((𝑖 + 1) − 1)) = (𝐹‘𝑖))
73	72	fveq2d 6895	. . . . . . . . . . . . . 14 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝑇‘(𝐹‘((𝑖 + 1) − 1))) = (𝑇‘(𝐹‘𝑖)))
74	73	rneqd 5937	. . . . . . . . . . . . 13 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → ran (𝑇‘(𝐹‘((𝑖 + 1) − 1))) = ran (𝑇‘(𝐹‘𝑖)))
75	66, 74	eleqtrd 2835	. . . . . . . . . . . 12 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝐹‘(𝑖 + 1)) ∈ ran (𝑇‘(𝐹‘𝑖)))
76	1, 2, 3, 4	efgi2 19634	. . . . . . . . . . . 12 ⊢ (((𝐹‘𝑖) ∈ 𝑊 ∧ (𝐹‘(𝑖 + 1)) ∈ ran (𝑇‘(𝐹‘𝑖))) → (𝐹‘𝑖) ∼ (𝐹‘(𝑖 + 1)))
77	51, 75, 76	syl2anc 584	. . . . . . . . . . 11 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (𝐹‘𝑖) ∼ (𝐹‘(𝑖 + 1)))
78	36	a1i 11	. . . . . . . . . . . 12 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → ∼ Er 𝑊)
79	78	ertr 8720	. . . . . . . . . . 11 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → (((𝐹‘0) ∼ (𝐹‘𝑖) ∧ (𝐹‘𝑖) ∼ (𝐹‘(𝑖 + 1))) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1))))
80	77, 79	mpan2d 692	. . . . . . . . . 10 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀ ∧ (𝑖 + 1) ∈ (0..^(♯‘𝐹))) → ((𝐹‘0) ∼ (𝐹‘𝑖) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1))))
81	80	3expia 1121	. . . . . . . . 9 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀) → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → ((𝐹‘0) ∼ (𝐹‘𝑖) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1)))))
82	81	a2d 29	. . . . . . . 8 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀) → (((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖)) → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1)))))
83	49, 82	syld 47	. . . . . . 7 ⊢ ((𝐹 ∈ dom 𝑆 ∧ 𝑖 ∈ ℕ₀) → ((𝑖 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖)) → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1)))))
84	83	expcom 414	. . . . . 6 ⊢ (𝑖 ∈ ℕ₀ → (𝐹 ∈ dom 𝑆 → ((𝑖 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖)) → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1))))))
85	84	a2d 29	. . . . 5 ⊢ (𝑖 ∈ ℕ₀ → ((𝐹 ∈ dom 𝑆 → (𝑖 ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘𝑖))) → (𝐹 ∈ dom 𝑆 → ((𝑖 + 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘(𝑖 + 1))))))
86	20, 25, 30, 35, 43, 85	nn0ind 12661	. . . 4 ⊢ (((♯‘𝐹) − 1) ∈ ℕ₀ → (𝐹 ∈ dom 𝑆 → (((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘((♯‘𝐹) − 1)))))
87	15, 86	mpcom 38	. . 3 ⊢ (𝐹 ∈ dom 𝑆 → (((♯‘𝐹) − 1) ∈ (0..^(♯‘𝐹)) → (𝐹‘0) ∼ (𝐹‘((♯‘𝐹) − 1))))
88	13, 87	mpd 15	. 2 ⊢ (𝐹 ∈ dom 𝑆 → (𝐹‘0) ∼ (𝐹‘((♯‘𝐹) − 1)))
89	1, 2, 3, 4, 5, 6	efgsval 19640	. 2 ⊢ (𝐹 ∈ dom 𝑆 → (𝑆‘𝐹) = (𝐹‘((♯‘𝐹) − 1)))
90	88, 89	breqtrrd 5176	1 ⊢ (𝐹 ∈ dom 𝑆 → (𝐹‘0) ∼ (𝑆‘𝐹))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 {crab 3432 ∖ cdif 3945 ∅c0 4322 {csn 4628 ⟨cop 4634 ⟨cotp 4636 ∪ ciun 4997 class class class wbr 5148 ↦ cmpt 5231 I cid 5573 × cxp 5674 dom cdm 5676 ran crn 5677 ⟶wf 6539 ‘cfv 6543 (class class class)co 7411 ∈ cmpo 7413 1_oc1o 8461 2_oc2o 8462 Er wer 8702 ℂcc 11110 0cc0 11112 1c1 11113 + caddc 11115 − cmin 11448 ℕcn 12216 ℕ₀cn0 12476 ℤ_≥cuz 12826 ...cfz 13488 ..^cfzo 13631 ♯chash 14294 Word cword 14468 splice csplice 14703 ⟨“cs2 14796 ~_FG cefg 19615

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-ot 4637 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-2o 8469 df-er 8705 df-ec 8707 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13489 df-fzo 13632 df-hash 14295 df-word 14469 df-concat 14525 df-s1 14550 df-substr 14595 df-pfx 14625 df-splice 14704 df-s2 14803 df-efg 19618

This theorem is referenced by: efgredeu 19661 efgred2 19662

W3C validator