madjusmdetlem2 - Mathbox for Thierry Arnoux

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Theorem madjusmdetlem2 33825

Description: Lemma for madjusmdet 33828. (Contributed by Thierry Arnoux, 26-Aug-2020.)

**Hypotheses**
Ref	Expression
madjusmdet.b	⊢ 𝐵 = (Base‘𝐴)
madjusmdet.a	⊢ 𝐴 = ((1...𝑁) Mat 𝑅)
madjusmdet.d	⊢ 𝐷 = ((1...𝑁) maDet 𝑅)
madjusmdet.k	⊢ 𝐾 = ((1...𝑁) maAdju 𝑅)
madjusmdet.t	⊢ · = (._r‘𝑅)
madjusmdet.z	⊢ 𝑍 = (ℤRHom‘𝑅)
madjusmdet.e	⊢ 𝐸 = ((1...(𝑁 − 1)) maDet 𝑅)
madjusmdet.n	⊢ (𝜑 → 𝑁 ∈ ℕ)
madjusmdet.r	⊢ (𝜑 → 𝑅 ∈ CRing)
madjusmdet.i	⊢ (𝜑 → 𝐼 ∈ (1...𝑁))
madjusmdet.j	⊢ (𝜑 → 𝐽 ∈ (1...𝑁))
madjusmdet.m	⊢ (𝜑 → 𝑀 ∈ 𝐵)
madjusmdetlem2.p	⊢ 𝑃 = (𝑖 ∈ (1...𝑁) ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖)))
madjusmdetlem2.s	⊢ 𝑆 = (𝑖 ∈ (1...𝑁) ↦ if(𝑖 = 1, 𝑁, if(𝑖 ≤ 𝑁, (𝑖 − 1), 𝑖)))

**Assertion**
Ref	Expression
madjusmdetlem2	⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → if(𝑋 < 𝐼, 𝑋, (𝑋 + 1)) = ((𝑃 ∘ ^◡𝑆)‘𝑋))

Distinct variable groups: 𝐵,𝑖 𝑖,𝐼 𝑖,𝐽 𝑖,𝑀 𝑖,𝑁 𝑃,𝑖 𝑅,𝑖 𝜑,𝑖 𝑆,𝑖 Allowed substitution hints: 𝐴(𝑖) 𝐷(𝑖) · (𝑖) 𝐸(𝑖) 𝐾(𝑖) 𝑋(𝑖) 𝑍(𝑖)

Proof of Theorem madjusmdetlem2 Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		madjusmdet.n	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑁 ∈ ℕ)
2		nnuz 12843	. . . . . . . . . . . 12 ⊢ ℕ = (ℤ_≥‘1)
3	1, 2	eleqtrdi 2839	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ (ℤ_≥‘1))
4		eluzfz2 13500	. . . . . . . . . . 11 ⊢ (𝑁 ∈ (ℤ_≥‘1) → 𝑁 ∈ (1...𝑁))
5	3, 4	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ∈ (1...𝑁))
6		eqid 2730	. . . . . . . . . . 11 ⊢ (1...𝑁) = (1...𝑁)
7		madjusmdetlem2.s	. . . . . . . . . . 11 ⊢ 𝑆 = (𝑖 ∈ (1...𝑁) ↦ if(𝑖 = 1, 𝑁, if(𝑖 ≤ 𝑁, (𝑖 − 1), 𝑖)))
8		eqid 2730	. . . . . . . . . . 11 ⊢ (SymGrp‘(1...𝑁)) = (SymGrp‘(1...𝑁))
9		eqid 2730	. . . . . . . . . . 11 ⊢ (Base‘(SymGrp‘(1...𝑁))) = (Base‘(SymGrp‘(1...𝑁)))
10	6, 7, 8, 9	fzto1st 33067	. . . . . . . . . 10 ⊢ (𝑁 ∈ (1...𝑁) → 𝑆 ∈ (Base‘(SymGrp‘(1...𝑁))))
11	5, 10	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑆 ∈ (Base‘(SymGrp‘(1...𝑁))))
12	8, 9	symgbasf1o 19312	. . . . . . . . 9 ⊢ (𝑆 ∈ (Base‘(SymGrp‘(1...𝑁))) → 𝑆:(1...𝑁)–1-1-onto→(1...𝑁))
13	11, 12	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑆:(1...𝑁)–1-1-onto→(1...𝑁))
14	13	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑆:(1...𝑁)–1-1-onto→(1...𝑁))
15		fznatpl1 13546	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑋 ∈ (1...(𝑁 − 1))) → (𝑋 + 1) ∈ (1...𝑁))
16	1, 15	sylan 580	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → (𝑋 + 1) ∈ (1...𝑁))
17		eqeq1 2734	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑥 → (𝑖 = 1 ↔ 𝑥 = 1))
18		breq1 5113	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑥 → (𝑖 ≤ 𝑁 ↔ 𝑥 ≤ 𝑁))
19		oveq1 7397	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑥 → (𝑖 − 1) = (𝑥 − 1))
20		id 22	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑥 → 𝑖 = 𝑥)
21	18, 19, 20	ifbieq12d 4520	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑥 → if(𝑖 ≤ 𝑁, (𝑖 − 1), 𝑖) = if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥))
22	17, 21	ifbieq2d 4518	. . . . . . . . . 10 ⊢ (𝑖 = 𝑥 → if(𝑖 = 1, 𝑁, if(𝑖 ≤ 𝑁, (𝑖 − 1), 𝑖)) = if(𝑥 = 1, 𝑁, if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥)))
23	22	cbvmptv 5214	. . . . . . . . 9 ⊢ (𝑖 ∈ (1...𝑁) ↦ if(𝑖 = 1, 𝑁, if(𝑖 ≤ 𝑁, (𝑖 − 1), 𝑖))) = (𝑥 ∈ (1...𝑁) ↦ if(𝑥 = 1, 𝑁, if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥)))
24	7, 23	eqtri 2753	. . . . . . . 8 ⊢ 𝑆 = (𝑥 ∈ (1...𝑁) ↦ if(𝑥 = 1, 𝑁, if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥)))
25		simpr 484	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 = (𝑋 + 1))
26		1red 11182	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 1 ∈ ℝ)
27		fz1ssnn 13523	. . . . . . . . . . . . . . . . 17 ⊢ (1...(𝑁 − 1)) ⊆ ℕ
28		simpr 484	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ∈ (1...(𝑁 − 1)))
29	27, 28	sselid 3947	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ∈ ℕ)
30	29	nnrpd 13000	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ∈ ℝ⁺)
31	30	adantr 480	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 𝑋 ∈ ℝ⁺)
32	26, 31	ltaddrp2d 13036	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 1 < (𝑋 + 1))
33	26, 32	gtned 11316	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → (𝑋 + 1) ≠ 1)
34	25, 33	eqnetrd 2993	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 ≠ 1)
35	34	neneqd 2931	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → ¬ 𝑥 = 1)
36	35	iffalsed 4502	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝑁, if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥)) = if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥))
37	1	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑁 ∈ ℕ)
38	29	nnnn0d 12510	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ∈ ℕ₀)
39	37	nnnn0d 12510	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑁 ∈ ℕ₀)
40		elfzle2 13496	. . . . . . . . . . . . . . 15 ⊢ (𝑋 ∈ (1...(𝑁 − 1)) → 𝑋 ≤ (𝑁 − 1))
41	28, 40	syl 17	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ≤ (𝑁 − 1))
42		nn0ltlem1 12601	. . . . . . . . . . . . . . 15 ⊢ ((𝑋 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ₀) → (𝑋 < 𝑁 ↔ 𝑋 ≤ (𝑁 − 1)))
43	42	biimpar 477	. . . . . . . . . . . . . 14 ⊢ (((𝑋 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ₀) ∧ 𝑋 ≤ (𝑁 − 1)) → 𝑋 < 𝑁)
44	38, 39, 41, 43	syl21anc 837	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 < 𝑁)
45		nnltp1le 12597	. . . . . . . . . . . . . 14 ⊢ ((𝑋 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑋 < 𝑁 ↔ (𝑋 + 1) ≤ 𝑁))
46	45	biimpa 476	. . . . . . . . . . . . 13 ⊢ (((𝑋 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑋 < 𝑁) → (𝑋 + 1) ≤ 𝑁)
47	29, 37, 44, 46	syl21anc 837	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → (𝑋 + 1) ≤ 𝑁)
48	47	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → (𝑋 + 1) ≤ 𝑁)
49	25, 48	eqbrtrd 5132	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 ≤ 𝑁)
50	49	iftrued 4499	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥) = (𝑥 − 1))
51	25	oveq1d 7405	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → (𝑥 − 1) = ((𝑋 + 1) − 1))
52	29	nncnd 12209	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ∈ ℂ)
53		1cnd 11176	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 1 ∈ ℂ)
54	52, 53	pncand 11541	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → ((𝑋 + 1) − 1) = 𝑋)
55	54	adantr 480	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → ((𝑋 + 1) − 1) = 𝑋)
56	51, 55	eqtrd 2765	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → (𝑥 − 1) = 𝑋)
57	36, 50, 56	3eqtrd 2769	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝑁, if(𝑥 ≤ 𝑁, (𝑥 − 1), 𝑥)) = 𝑋)
58	24, 57, 16, 28	fvmptd2 6979	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → (𝑆‘(𝑋 + 1)) = 𝑋)
59		f1ocnvfv 7256	. . . . . . . 8 ⊢ ((𝑆:(1...𝑁)–1-1-onto→(1...𝑁) ∧ (𝑋 + 1) ∈ (1...𝑁)) → ((𝑆‘(𝑋 + 1)) = 𝑋 → (^◡𝑆‘𝑋) = (𝑋 + 1)))
60	59	imp 406	. . . . . . 7 ⊢ (((𝑆:(1...𝑁)–1-1-onto→(1...𝑁) ∧ (𝑋 + 1) ∈ (1...𝑁)) ∧ (𝑆‘(𝑋 + 1)) = 𝑋) → (^◡𝑆‘𝑋) = (𝑋 + 1))
61	14, 16, 58, 60	syl21anc 837	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → (^◡𝑆‘𝑋) = (𝑋 + 1))
62	61	fveq2d 6865	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → (𝑃‘(^◡𝑆‘𝑋)) = (𝑃‘(𝑋 + 1)))
63	62	adantr 480	. . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) → (𝑃‘(^◡𝑆‘𝑋)) = (𝑃‘(𝑋 + 1)))
64		madjusmdetlem2.p	. . . . . 6 ⊢ 𝑃 = (𝑖 ∈ (1...𝑁) ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖)))
65		breq1 5113	. . . . . . . . 9 ⊢ (𝑖 = 𝑥 → (𝑖 ≤ 𝐼 ↔ 𝑥 ≤ 𝐼))
66	65, 19, 20	ifbieq12d 4520	. . . . . . . 8 ⊢ (𝑖 = 𝑥 → if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖) = if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥))
67	17, 66	ifbieq2d 4518	. . . . . . 7 ⊢ (𝑖 = 𝑥 → if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖)) = if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)))
68	67	cbvmptv 5214	. . . . . 6 ⊢ (𝑖 ∈ (1...𝑁) ↦ if(𝑖 = 1, 𝐼, if(𝑖 ≤ 𝐼, (𝑖 − 1), 𝑖))) = (𝑥 ∈ (1...𝑁) ↦ if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)))
69	64, 68	eqtri 2753	. . . . 5 ⊢ 𝑃 = (𝑥 ∈ (1...𝑁) ↦ if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)))
70	32, 25	breqtrrd 5138	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 1 < 𝑥)
71	26, 70	gtned 11316	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 ≠ 1)
72	71	neneqd 2931	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → ¬ 𝑥 = 1)
73	72	iffalsed 4502	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)) = if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥))
74	73	adantlr 715	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)) = if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥))
75		simpr 484	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 = (𝑋 + 1))
76	29	ad2antrr 726	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → 𝑋 ∈ ℕ)
77		fz1ssnn 13523	. . . . . . . . . . 11 ⊢ (1...𝑁) ⊆ ℕ
78		madjusmdet.i	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐼 ∈ (1...𝑁))
79	77, 78	sselid 3947	. . . . . . . . . 10 ⊢ (𝜑 → 𝐼 ∈ ℕ)
80	79	ad3antrrr 730	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → 𝐼 ∈ ℕ)
81		simplr 768	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → 𝑋 < 𝐼)
82		nnltp1le 12597	. . . . . . . . . 10 ⊢ ((𝑋 ∈ ℕ ∧ 𝐼 ∈ ℕ) → (𝑋 < 𝐼 ↔ (𝑋 + 1) ≤ 𝐼))
83	82	biimpa 476	. . . . . . . . 9 ⊢ (((𝑋 ∈ ℕ ∧ 𝐼 ∈ ℕ) ∧ 𝑋 < 𝐼) → (𝑋 + 1) ≤ 𝐼)
84	76, 80, 81, 83	syl21anc 837	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → (𝑋 + 1) ≤ 𝐼)
85	75, 84	eqbrtrd 5132	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 ≤ 𝐼)
86	85	iftrued 4499	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥) = (𝑥 − 1))
87	56	adantlr 715	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → (𝑥 − 1) = 𝑋)
88	74, 86, 87	3eqtrd 2769	. . . . 5 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)) = 𝑋)
89	16	adantr 480	. . . . 5 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) → (𝑋 + 1) ∈ (1...𝑁))
90		simplr 768	. . . . 5 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) → 𝑋 ∈ (1...(𝑁 − 1)))
91	69, 88, 89, 90	fvmptd2 6979	. . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) → (𝑃‘(𝑋 + 1)) = 𝑋)
92	63, 91	eqtr2d 2766	. . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑋 < 𝐼) → 𝑋 = (𝑃‘(^◡𝑆‘𝑋)))
93	62	adantr 480	. . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) → (𝑃‘(^◡𝑆‘𝑋)) = (𝑃‘(𝑋 + 1)))
94	73	adantlr 715	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)) = if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥))
95	29	ad2antrr 726	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ 𝑥 ≤ 𝐼) → 𝑋 ∈ ℕ)
96	79	ad3antrrr 730	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ 𝑥 ≤ 𝐼) → 𝐼 ∈ ℕ)
97		simplr 768	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ 𝑥 ≤ 𝐼) → 𝑥 = (𝑋 + 1))
98		simpr 484	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ 𝑥 ≤ 𝐼) → 𝑥 ≤ 𝐼)
99	97, 98	eqbrtrrd 5134	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ 𝑥 ≤ 𝐼) → (𝑋 + 1) ≤ 𝐼)
100	82	biimpar 477	. . . . . . . . . 10 ⊢ (((𝑋 ∈ ℕ ∧ 𝐼 ∈ ℕ) ∧ (𝑋 + 1) ≤ 𝐼) → 𝑋 < 𝐼)
101	95, 96, 99, 100	syl21anc 837	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ 𝑥 ≤ 𝐼) → 𝑋 < 𝐼)
102	101	stoic1a 1772	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ 𝑥 = (𝑋 + 1)) ∧ ¬ 𝑋 < 𝐼) → ¬ 𝑥 ≤ 𝐼)
103	102	an32s 652	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → ¬ 𝑥 ≤ 𝐼)
104	103	iffalsed 4502	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥) = 𝑥)
105		simpr 484	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → 𝑥 = (𝑋 + 1))
106	94, 104, 105	3eqtrd 2769	. . . . 5 ⊢ ((((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) ∧ 𝑥 = (𝑋 + 1)) → if(𝑥 = 1, 𝐼, if(𝑥 ≤ 𝐼, (𝑥 − 1), 𝑥)) = (𝑋 + 1))
107	16	adantr 480	. . . . 5 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) → (𝑋 + 1) ∈ (1...𝑁))
108	69, 106, 107, 107	fvmptd2 6979	. . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) → (𝑃‘(𝑋 + 1)) = (𝑋 + 1))
109	93, 108	eqtr2d 2766	. . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) ∧ ¬ 𝑋 < 𝐼) → (𝑋 + 1) = (𝑃‘(^◡𝑆‘𝑋)))
110	92, 109	ifeqda 4528	. 2 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → if(𝑋 < 𝐼, 𝑋, (𝑋 + 1)) = (𝑃‘(^◡𝑆‘𝑋)))
111		f1ocnv 6815	. . . . 5 ⊢ (𝑆:(1...𝑁)–1-1-onto→(1...𝑁) → ^◡𝑆:(1...𝑁)–1-1-onto→(1...𝑁))
112	11, 12, 111	3syl 18	. . . 4 ⊢ (𝜑 → ^◡𝑆:(1...𝑁)–1-1-onto→(1...𝑁))
113		f1ofun 6805	. . . 4 ⊢ (^◡𝑆:(1...𝑁)–1-1-onto→(1...𝑁) → Fun ^◡𝑆)
114	112, 113	syl 17	. . 3 ⊢ (𝜑 → Fun ^◡𝑆)
115		fzdif2 32720	. . . . . . 7 ⊢ (𝑁 ∈ (ℤ_≥‘1) → ((1...𝑁) ∖ {𝑁}) = (1...(𝑁 − 1)))
116	3, 115	syl 17	. . . . . 6 ⊢ (𝜑 → ((1...𝑁) ∖ {𝑁}) = (1...(𝑁 − 1)))
117		difss 4102	. . . . . 6 ⊢ ((1...𝑁) ∖ {𝑁}) ⊆ (1...𝑁)
118	116, 117	eqsstrrdi 3995	. . . . 5 ⊢ (𝜑 → (1...(𝑁 − 1)) ⊆ (1...𝑁))
119		f1odm 6807	. . . . . 6 ⊢ (^◡𝑆:(1...𝑁)–1-1-onto→(1...𝑁) → dom ^◡𝑆 = (1...𝑁))
120	112, 119	syl 17	. . . . 5 ⊢ (𝜑 → dom ^◡𝑆 = (1...𝑁))
121	118, 120	sseqtrrd 3987	. . . 4 ⊢ (𝜑 → (1...(𝑁 − 1)) ⊆ dom ^◡𝑆)
122	121	sselda 3949	. . 3 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → 𝑋 ∈ dom ^◡𝑆)
123		fvco 6962	. . 3 ⊢ ((Fun ^◡𝑆 ∧ 𝑋 ∈ dom ^◡𝑆) → ((𝑃 ∘ ^◡𝑆)‘𝑋) = (𝑃‘(^◡𝑆‘𝑋)))
124	114, 122, 123	syl2an2r 685	. 2 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → ((𝑃 ∘ ^◡𝑆)‘𝑋) = (𝑃‘(^◡𝑆‘𝑋)))
125	110, 124	eqtr4d 2768	1 ⊢ ((𝜑 ∧ 𝑋 ∈ (1...(𝑁 − 1))) → if(𝑋 < 𝐼, 𝑋, (𝑋 + 1)) = ((𝑃 ∘ ^◡𝑆)‘𝑋))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∖ cdif 3914 ifcif 4491 {csn 4592 class class class wbr 5110 ↦ cmpt 5191 ^◡ccnv 5640 dom cdm 5641 ∘ ccom 5645 Fun wfun 6508 –1-1-onto→wf1o 6513 ‘cfv 6514 (class class class)co 7390 1c1 11076 + caddc 11078 < clt 11215 ≤ cle 11216 − cmin 11412 ℕcn 12193 ℕ₀cn0 12449 ℤ_≥cuz 12800 ℝ⁺crp 12958 ...cfz 13475 Basecbs 17186 ._rcmulr 17228 SymGrpcsymg 19306 CRingccrg 20150 ℤRHomczrh 21416 Mat cmat 22301 maDet cmdat 22478 maAdju cmadu 22526

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 2702 ax-rep 5237 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152

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 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-pss 3937 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-tp 4597 df-op 4599 df-uni 4875 df-iun 4960 df-br 5111 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5536 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5594 df-we 5596 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7846 df-1st 7971 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8381 df-1o 8437 df-2o 8438 df-er 8674 df-map 8804 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 df-nn 12194 df-2 12256 df-3 12257 df-4 12258 df-5 12259 df-6 12260 df-7 12261 df-8 12262 df-9 12263 df-n0 12450 df-z 12537 df-uz 12801 df-rp 12959 df-fz 13476 df-struct 17124 df-sets 17141 df-slot 17159 df-ndx 17171 df-base 17187 df-ress 17208 df-plusg 17240 df-tset 17246 df-efmnd 18803 df-symg 19307 df-pmtr 19379

This theorem is referenced by: madjusmdetlem3 33826

W3C validator