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Theorem pthdlem1 29696

Description: Lemma 1 for pthd 29699. (Contributed by Alexander van der Vekens, 13-Nov-2017.) (Revised by AV, 9-Feb-2021.)

**Hypotheses**
Ref	Expression
pthd.p	⊢ (𝜑 → 𝑃 ∈ Word V)
pthd.r	⊢ 𝑅 = ((♯‘𝑃) − 1)
pthd.s	⊢ (𝜑 → ∀𝑖 ∈ (0..^(♯‘𝑃))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))

**Assertion**
Ref	Expression
pthdlem1	⊢ (𝜑 → Fun ^◡(𝑃 ↾ (1..^𝑅)))

Distinct variable groups: 𝑃,𝑖,𝑗 𝑅,𝑖,𝑗 𝜑,𝑖,𝑗

**Proof of Theorem pthdlem1**
Step	Hyp	Ref	Expression
1		pthd.p	. . . . . . . 8 ⊢ (𝜑 → 𝑃 ∈ Word V)
2		wrdf 14483	. . . . . . . 8 ⊢ (𝑃 ∈ Word V → 𝑃:(0..^(♯‘𝑃))⟶V)
3	1, 2	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑃:(0..^(♯‘𝑃))⟶V)
4		fzo0ss1 13650	. . . . . . . . 9 ⊢ (1..^𝑅) ⊆ (0..^𝑅)
5		pthd.r	. . . . . . . . . . 11 ⊢ 𝑅 = ((♯‘𝑃) − 1)
6	5	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → 𝑅 = ((♯‘𝑃) − 1))
7	6	oveq2d 7403	. . . . . . . . 9 ⊢ (𝜑 → (0..^𝑅) = (0..^((♯‘𝑃) − 1)))
8	4, 7	sseqtrid 3989	. . . . . . . 8 ⊢ (𝜑 → (1..^𝑅) ⊆ (0..^((♯‘𝑃) − 1)))
9		lencl 14498	. . . . . . . . 9 ⊢ (𝑃 ∈ Word V → (♯‘𝑃) ∈ ℕ₀)
10		nn0z 12554	. . . . . . . . 9 ⊢ ((♯‘𝑃) ∈ ℕ₀ → (♯‘𝑃) ∈ ℤ)
11		fzossrbm1 13649	. . . . . . . . 9 ⊢ ((♯‘𝑃) ∈ ℤ → (0..^((♯‘𝑃) − 1)) ⊆ (0..^(♯‘𝑃)))
12	1, 9, 10, 11	4syl 19	. . . . . . . 8 ⊢ (𝜑 → (0..^((♯‘𝑃) − 1)) ⊆ (0..^(♯‘𝑃)))
13	8, 12	sstrd 3957	. . . . . . 7 ⊢ (𝜑 → (1..^𝑅) ⊆ (0..^(♯‘𝑃)))
14	3, 13	fssresd 6727	. . . . . 6 ⊢ (𝜑 → (𝑃 ↾ (1..^𝑅)):(1..^𝑅)⟶V)
15	14	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (𝑃 ↾ (1..^𝑅)):(1..^𝑅)⟶V)
16		pthd.s	. . . . . . 7 ⊢ (𝜑 → ∀𝑖 ∈ (0..^(♯‘𝑃))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))
17	16	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → ∀𝑖 ∈ (0..^(♯‘𝑃))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))
18	1, 9	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → (♯‘𝑃) ∈ ℕ₀)
19		nn0re 12451	. . . . . . . . . . . . . . . 16 ⊢ ((♯‘𝑃) ∈ ℕ₀ → (♯‘𝑃) ∈ ℝ)
20	19	ltm1d 12115	. . . . . . . . . . . . . . 15 ⊢ ((♯‘𝑃) ∈ ℕ₀ → ((♯‘𝑃) − 1) < (♯‘𝑃))
21		1re 11174	. . . . . . . . . . . . . . . . 17 ⊢ 1 ∈ ℝ
22		peano2rem 11489	. . . . . . . . . . . . . . . . . 18 ⊢ ((♯‘𝑃) ∈ ℝ → ((♯‘𝑃) − 1) ∈ ℝ)
23	19, 22	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((♯‘𝑃) ∈ ℕ₀ → ((♯‘𝑃) − 1) ∈ ℝ)
24		lttr 11250	. . . . . . . . . . . . . . . . 17 ⊢ ((1 ∈ ℝ ∧ ((♯‘𝑃) − 1) ∈ ℝ ∧ (♯‘𝑃) ∈ ℝ) → ((1 < ((♯‘𝑃) − 1) ∧ ((♯‘𝑃) − 1) < (♯‘𝑃)) → 1 < (♯‘𝑃)))
25	21, 23, 19, 24	mp3an2i 1468	. . . . . . . . . . . . . . . 16 ⊢ ((♯‘𝑃) ∈ ℕ₀ → ((1 < ((♯‘𝑃) − 1) ∧ ((♯‘𝑃) − 1) < (♯‘𝑃)) → 1 < (♯‘𝑃)))
26		1red 11175	. . . . . . . . . . . . . . . . 17 ⊢ ((♯‘𝑃) ∈ ℕ₀ → 1 ∈ ℝ)
27		ltle 11262	. . . . . . . . . . . . . . . . 17 ⊢ ((1 ∈ ℝ ∧ (♯‘𝑃) ∈ ℝ) → (1 < (♯‘𝑃) → 1 ≤ (♯‘𝑃)))
28	26, 19, 27	syl2anc 584	. . . . . . . . . . . . . . . 16 ⊢ ((♯‘𝑃) ∈ ℕ₀ → (1 < (♯‘𝑃) → 1 ≤ (♯‘𝑃)))
29	25, 28	syld 47	. . . . . . . . . . . . . . 15 ⊢ ((♯‘𝑃) ∈ ℕ₀ → ((1 < ((♯‘𝑃) − 1) ∧ ((♯‘𝑃) − 1) < (♯‘𝑃)) → 1 ≤ (♯‘𝑃)))
30	20, 29	mpan2d 694	. . . . . . . . . . . . . 14 ⊢ ((♯‘𝑃) ∈ ℕ₀ → (1 < ((♯‘𝑃) − 1) → 1 ≤ (♯‘𝑃)))
31	30	imdistani 568	. . . . . . . . . . . . 13 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 1 < ((♯‘𝑃) − 1)) → ((♯‘𝑃) ∈ ℕ₀ ∧ 1 ≤ (♯‘𝑃)))
32		elnnnn0c 12487	. . . . . . . . . . . . 13 ⊢ ((♯‘𝑃) ∈ ℕ ↔ ((♯‘𝑃) ∈ ℕ₀ ∧ 1 ≤ (♯‘𝑃)))
33	31, 32	sylibr 234	. . . . . . . . . . . 12 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 1 < ((♯‘𝑃) − 1)) → (♯‘𝑃) ∈ ℕ)
34	18, 33	sylan 580	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (♯‘𝑃) ∈ ℕ)
35		fzo0sn0fzo1 13716	. . . . . . . . . . 11 ⊢ ((♯‘𝑃) ∈ ℕ → (0..^(♯‘𝑃)) = ({0} ∪ (1..^(♯‘𝑃))))
36	34, 35	syl 17	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (0..^(♯‘𝑃)) = ({0} ∪ (1..^(♯‘𝑃))))
37		1zzd 12564	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → 1 ∈ ℤ)
38		1p1e2 12306	. . . . . . . . . . . . . . . 16 ⊢ (1 + 1) = 2
39		2z 12565	. . . . . . . . . . . . . . . 16 ⊢ 2 ∈ ℤ
40	38, 39	eqeltri 2824	. . . . . . . . . . . . . . 15 ⊢ (1 + 1) ∈ ℤ
41	40	a1i 11	. . . . . . . . . . . . . 14 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 1 < ((♯‘𝑃) − 1)) → (1 + 1) ∈ ℤ)
42	10	adantr 480	. . . . . . . . . . . . . 14 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 1 < ((♯‘𝑃) − 1)) → (♯‘𝑃) ∈ ℤ)
43		ltaddsub 11652	. . . . . . . . . . . . . . . . . 18 ⊢ ((1 ∈ ℝ ∧ 1 ∈ ℝ ∧ (♯‘𝑃) ∈ ℝ) → ((1 + 1) < (♯‘𝑃) ↔ 1 < ((♯‘𝑃) − 1)))
44	43	bicomd 223	. . . . . . . . . . . . . . . . 17 ⊢ ((1 ∈ ℝ ∧ 1 ∈ ℝ ∧ (♯‘𝑃) ∈ ℝ) → (1 < ((♯‘𝑃) − 1) ↔ (1 + 1) < (♯‘𝑃)))
45	21, 26, 19, 44	mp3an2i 1468	. . . . . . . . . . . . . . . 16 ⊢ ((♯‘𝑃) ∈ ℕ₀ → (1 < ((♯‘𝑃) − 1) ↔ (1 + 1) < (♯‘𝑃)))
46		2re 12260	. . . . . . . . . . . . . . . . . 18 ⊢ 2 ∈ ℝ
47	38, 46	eqeltri 2824	. . . . . . . . . . . . . . . . 17 ⊢ (1 + 1) ∈ ℝ
48		ltle 11262	. . . . . . . . . . . . . . . . 17 ⊢ (((1 + 1) ∈ ℝ ∧ (♯‘𝑃) ∈ ℝ) → ((1 + 1) < (♯‘𝑃) → (1 + 1) ≤ (♯‘𝑃)))
49	47, 19, 48	sylancr 587	. . . . . . . . . . . . . . . 16 ⊢ ((♯‘𝑃) ∈ ℕ₀ → ((1 + 1) < (♯‘𝑃) → (1 + 1) ≤ (♯‘𝑃)))
50	45, 49	sylbid 240	. . . . . . . . . . . . . . 15 ⊢ ((♯‘𝑃) ∈ ℕ₀ → (1 < ((♯‘𝑃) − 1) → (1 + 1) ≤ (♯‘𝑃)))
51	50	imp 406	. . . . . . . . . . . . . 14 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 1 < ((♯‘𝑃) − 1)) → (1 + 1) ≤ (♯‘𝑃))
52		eluz2 12799	. . . . . . . . . . . . . 14 ⊢ ((♯‘𝑃) ∈ (ℤ_≥‘(1 + 1)) ↔ ((1 + 1) ∈ ℤ ∧ (♯‘𝑃) ∈ ℤ ∧ (1 + 1) ≤ (♯‘𝑃)))
53	41, 42, 51, 52	syl3anbrc 1344	. . . . . . . . . . . . 13 ⊢ (((♯‘𝑃) ∈ ℕ₀ ∧ 1 < ((♯‘𝑃) − 1)) → (♯‘𝑃) ∈ (ℤ_≥‘(1 + 1)))
54	18, 53	sylan 580	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (♯‘𝑃) ∈ (ℤ_≥‘(1 + 1)))
55		fzosplitsnm1 13701	. . . . . . . . . . . 12 ⊢ ((1 ∈ ℤ ∧ (♯‘𝑃) ∈ (ℤ_≥‘(1 + 1))) → (1..^(♯‘𝑃)) = ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)}))
56	37, 54, 55	syl2anc 584	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (1..^(♯‘𝑃)) = ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)}))
57	56	uneq2d 4131	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → ({0} ∪ (1..^(♯‘𝑃))) = ({0} ∪ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)})))
58	36, 57	eqtrd 2764	. . . . . . . . 9 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (0..^(♯‘𝑃)) = ({0} ∪ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)})))
59	58	raleqdv 3299	. . . . . . . 8 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (∀𝑖 ∈ (0..^(♯‘𝑃))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ↔ ∀𝑖 ∈ ({0} ∪ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)}))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗))))
60		ralunb 4160	. . . . . . . . 9 ⊢ (∀𝑖 ∈ ({0} ∪ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)}))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ↔ (∀𝑖 ∈ {0}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)})∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗))))
61		ralunb 4160	. . . . . . . . . 10 ⊢ (∀𝑖 ∈ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)})∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ↔ (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ {((♯‘𝑃) − 1)}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗))))
62	61	anbi2i 623	. . . . . . . . 9 ⊢ ((∀𝑖 ∈ {0}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)})∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗))) ↔ (∀𝑖 ∈ {0}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ {((♯‘𝑃) − 1)}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))))
63	60, 62	bitri 275	. . . . . . . 8 ⊢ (∀𝑖 ∈ ({0} ∪ ((1..^((♯‘𝑃) − 1)) ∪ {((♯‘𝑃) − 1)}))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ↔ (∀𝑖 ∈ {0}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ {((♯‘𝑃) − 1)}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))))
64	59, 63	bitrdi 287	. . . . . . 7 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (∀𝑖 ∈ (0..^(♯‘𝑃))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ↔ (∀𝑖 ∈ {0}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ {((♯‘𝑃) − 1)}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗))))))
65	5	eqcomi 2738	. . . . . . . . . . . 12 ⊢ ((♯‘𝑃) − 1) = 𝑅
66	65	oveq2i 7398	. . . . . . . . . . 11 ⊢ (1..^((♯‘𝑃) − 1)) = (1..^𝑅)
67	66	raleqi 3297	. . . . . . . . . 10 ⊢ (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ↔ ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))
68		fvres 6877	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 ∈ (1..^𝑅) → ((𝑃 ↾ (1..^𝑅))‘𝑖) = (𝑃‘𝑖))
69	68	eqcomd 2735	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 ∈ (1..^𝑅) → (𝑃‘𝑖) = ((𝑃 ↾ (1..^𝑅))‘𝑖))
70	69	adantl 481	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) → (𝑃‘𝑖) = ((𝑃 ↾ (1..^𝑅))‘𝑖))
71	70	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) ∧ 𝑗 ∈ (1..^𝑅)) → (𝑃‘𝑖) = ((𝑃 ↾ (1..^𝑅))‘𝑖))
72		fvres 6877	. . . . . . . . . . . . . . . . 17 ⊢ (𝑗 ∈ (1..^𝑅) → ((𝑃 ↾ (1..^𝑅))‘𝑗) = (𝑃‘𝑗))
73	72	eqcomd 2735	. . . . . . . . . . . . . . . 16 ⊢ (𝑗 ∈ (1..^𝑅) → (𝑃‘𝑗) = ((𝑃 ↾ (1..^𝑅))‘𝑗))
74	73	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) ∧ 𝑗 ∈ (1..^𝑅)) → (𝑃‘𝑗) = ((𝑃 ↾ (1..^𝑅))‘𝑗))
75	71, 74	neeq12d 2986	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) ∧ 𝑗 ∈ (1..^𝑅)) → ((𝑃‘𝑖) ≠ (𝑃‘𝑗) ↔ ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗)))
76	75	biimpd 229	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) ∧ 𝑗 ∈ (1..^𝑅)) → ((𝑃‘𝑖) ≠ (𝑃‘𝑗) → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗)))
77	76	imim2d 57	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) ∧ 𝑗 ∈ (1..^𝑅)) → ((𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) → (𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
78	77	ralimdva 3145	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) ∧ 𝑖 ∈ (1..^𝑅)) → (∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) → ∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
79	78	ralimdva 3145	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) → ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
80	67, 79	biimtrid 242	. . . . . . . . 9 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) → ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
81	80	adantrd 491	. . . . . . . 8 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → ((∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ {((♯‘𝑃) − 1)}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗))) → ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
82	81	adantld 490	. . . . . . 7 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → ((∀𝑖 ∈ {0}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ (∀𝑖 ∈ (1..^((♯‘𝑃) − 1))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) ∧ ∀𝑖 ∈ {((♯‘𝑃) − 1)}∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)))) → ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
83	64, 82	sylbid 240	. . . . . 6 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (∀𝑖 ∈ (0..^(♯‘𝑃))∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → (𝑃‘𝑖) ≠ (𝑃‘𝑗)) → ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
84	17, 83	mpd 15	. . . . 5 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗)))
85		dff14a 7245	. . . . 5 ⊢ ((𝑃 ↾ (1..^𝑅)):(1..^𝑅)–1-1→V ↔ ((𝑃 ↾ (1..^𝑅)):(1..^𝑅)⟶V ∧ ∀𝑖 ∈ (1..^𝑅)∀𝑗 ∈ (1..^𝑅)(𝑖 ≠ 𝑗 → ((𝑃 ↾ (1..^𝑅))‘𝑖) ≠ ((𝑃 ↾ (1..^𝑅))‘𝑗))))
86	15, 84, 85	sylanbrc 583	. . . 4 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → (𝑃 ↾ (1..^𝑅)):(1..^𝑅)–1-1→V)
87		df-f1 6516	. . . 4 ⊢ ((𝑃 ↾ (1..^𝑅)):(1..^𝑅)–1-1→V ↔ ((𝑃 ↾ (1..^𝑅)):(1..^𝑅)⟶V ∧ Fun ^◡(𝑃 ↾ (1..^𝑅))))
88	86, 87	sylib 218	. . 3 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → ((𝑃 ↾ (1..^𝑅)):(1..^𝑅)⟶V ∧ Fun ^◡(𝑃 ↾ (1..^𝑅))))
89	88	simprd 495	. 2 ⊢ ((𝜑 ∧ 1 < ((♯‘𝑃) − 1)) → Fun ^◡(𝑃 ↾ (1..^𝑅)))
90		funcnv0 6582	. . 3 ⊢ Fun ^◡∅
91	18	nn0zd 12555	. . . . . . . . . . . . 13 ⊢ (𝜑 → (♯‘𝑃) ∈ ℤ)
92		peano2zm 12576	. . . . . . . . . . . . 13 ⊢ ((♯‘𝑃) ∈ ℤ → ((♯‘𝑃) − 1) ∈ ℤ)
93	91, 92	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → ((♯‘𝑃) − 1) ∈ ℤ)
94	93	zred 12638	. . . . . . . . . . 11 ⊢ (𝜑 → ((♯‘𝑃) − 1) ∈ ℝ)
95		1red 11175	. . . . . . . . . . 11 ⊢ (𝜑 → 1 ∈ ℝ)
96	94, 95	lenltd 11320	. . . . . . . . . 10 ⊢ (𝜑 → (((♯‘𝑃) − 1) ≤ 1 ↔ ¬ 1 < ((♯‘𝑃) − 1)))
97	96	biimpar 477	. . . . . . . . 9 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → ((♯‘𝑃) − 1) ≤ 1)
98	5, 97	eqbrtrid 5142	. . . . . . . 8 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → 𝑅 ≤ 1)
99		1zzd 12564	. . . . . . . . . . 11 ⊢ (𝜑 → 1 ∈ ℤ)
100	5, 93	eqeltrid 2832	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑅 ∈ ℤ)
101	99, 100	jca 511	. . . . . . . . . 10 ⊢ (𝜑 → (1 ∈ ℤ ∧ 𝑅 ∈ ℤ))
102	101	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → (1 ∈ ℤ ∧ 𝑅 ∈ ℤ))
103		fzon 13641	. . . . . . . . . 10 ⊢ ((1 ∈ ℤ ∧ 𝑅 ∈ ℤ) → (𝑅 ≤ 1 ↔ (1..^𝑅) = ∅))
104	103	bicomd 223	. . . . . . . . 9 ⊢ ((1 ∈ ℤ ∧ 𝑅 ∈ ℤ) → ((1..^𝑅) = ∅ ↔ 𝑅 ≤ 1))
105	102, 104	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → ((1..^𝑅) = ∅ ↔ 𝑅 ≤ 1))
106	98, 105	mpbird 257	. . . . . . 7 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → (1..^𝑅) = ∅)
107	106	reseq2d 5950	. . . . . 6 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → (𝑃 ↾ (1..^𝑅)) = (𝑃 ↾ ∅))
108		res0 5954	. . . . . 6 ⊢ (𝑃 ↾ ∅) = ∅
109	107, 108	eqtrdi 2780	. . . . 5 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → (𝑃 ↾ (1..^𝑅)) = ∅)
110	109	cnveqd 5839	. . . 4 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → ^◡(𝑃 ↾ (1..^𝑅)) = ^◡∅)
111	110	funeqd 6538	. . 3 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → (Fun ^◡(𝑃 ↾ (1..^𝑅)) ↔ Fun ^◡∅))
112	90, 111	mpbiri 258	. 2 ⊢ ((𝜑 ∧ ¬ 1 < ((♯‘𝑃) − 1)) → Fun ^◡(𝑃 ↾ (1..^𝑅)))
113	89, 112	pm2.61dan 812	1 ⊢ (𝜑 → Fun ^◡(𝑃 ↾ (1..^𝑅)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 ∀wral 3044 Vcvv 3447 ∪ cun 3912 ⊆ wss 3914 ∅c0 4296 {csn 4589 class class class wbr 5107 ^◡ccnv 5637 ↾ cres 5640 Fun wfun 6505 ⟶wf 6507 –1-1→wf1 6508 ‘cfv 6511 (class class class)co 7387 ℝcr 11067 0cc0 11068 1c1 11069 + caddc 11071 < clt 11208 ≤ cle 11209 − cmin 11405 ℕcn 12186 2c2 12241 ℕ₀cn0 12442 ℤcz 12529 ℤ_≥cuz 12793 ..^cfzo 13615 ♯chash 14295 Word cword 14478

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 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 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 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-fin 8922 df-card 9892 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-2 12249 df-n0 12443 df-z 12530 df-uz 12794 df-fz 13469 df-fzo 13616 df-hash 14296 df-word 14479

This theorem is referenced by: pthd 29699

W3C validator