Theorem tfrlem1 6412

Description: A technical lemma for transfinite recursion. Compare Lemma 1 of [TakeutiZaring] p. 47. (Contributed by NM, 23-Mar-1995.) (Revised by Mario Carneiro, 24-May-2019.)

Hypotheses

Ref	Expression
tfrlem1.1	⊢ (𝜑 → 𝐴 ∈ On)
tfrlem1.2	⊢ (𝜑 → (Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹))
tfrlem1.3	⊢ (𝜑 → (Fun 𝐺 ∧ 𝐴 ⊆ dom 𝐺))
tfrlem1.4	⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐵‘(𝐹 ↾ 𝑥)))
tfrlem1.5	⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐺‘𝑥) = (𝐵‘(𝐺 ↾ 𝑥)))

Assertion

Ref	Expression
tfrlem1	⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))

Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐹   𝑥,𝐺

Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem tfrlem1

Dummy variables 𝑢 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ssid 3217	. 2 ⊢ 𝐴 ⊆ 𝐴
2		tfrlem1.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ On)
3		sseq1 3220	. . . . . 6 ⊢ (𝑦 = 𝐴 → (𝑦 ⊆ 𝐴 ↔ 𝐴 ⊆ 𝐴))
4		raleq 2703	. . . . . 6 ⊢ (𝑦 = 𝐴 → (∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥) ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥)))
5	3, 4	imbi12d 234	. . . . 5 ⊢ (𝑦 = 𝐴 → ((𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥)) ↔ (𝐴 ⊆ 𝐴 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))))
6	5	imbi2d 230	. . . 4 ⊢ (𝑦 = 𝐴 → ((𝜑 → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥))) ↔ (𝜑 → (𝐴 ⊆ 𝐴 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥)))))
7		sseq1 3220	. . . . . . 7 ⊢ (𝑦 = 𝑧 → (𝑦 ⊆ 𝐴 ↔ 𝑧 ⊆ 𝐴))
8		raleq 2703	. . . . . . 7 ⊢ (𝑦 = 𝑧 → (∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥) ↔ ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)))
9	7, 8	imbi12d 234	. . . . . 6 ⊢ (𝑦 = 𝑧 → ((𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥)) ↔ (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))))
10	9	imbi2d 230	. . . . 5 ⊢ (𝑦 = 𝑧 → ((𝜑 → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥))) ↔ (𝜑 → (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)))))
11		r19.21v 2584	. . . . . 6 ⊢ (∀𝑧 ∈ 𝑦 (𝜑 → (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ↔ (𝜑 → ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))))
12		simplll 533	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → 𝜑)
13	12	adantr 276	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝜑)
14		tfrlem1.2	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹))
15	13, 14	syl 14	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹))
16	15	simpld 112	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → Fun 𝐹)
17		funfn 5315	. . . . . . . . . . . . . . . 16 ⊢ (Fun 𝐹 ↔ 𝐹 Fn dom 𝐹)
18	16, 17	sylib 122	. . . . . . . . . . . . . . 15 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝐹 Fn dom 𝐹)
19		simpllr 534	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → 𝑦 ∈ On)
20		eloni 4435	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑦 ∈ On → Ord 𝑦)
21	19, 20	syl 14	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → Ord 𝑦)
22		ordelss 4439	. . . . . . . . . . . . . . . . . 18 ⊢ ((Ord 𝑦 ∧ 𝑤 ∈ 𝑦) → 𝑤 ⊆ 𝑦)
23	21, 22	sylan 283	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝑤 ⊆ 𝑦)
24		simplr 528	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝑦 ⊆ 𝐴)
25	23, 24	sstrd 3207	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝑤 ⊆ 𝐴)
26	15	simprd 114	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝐴 ⊆ dom 𝐹)
27	25, 26	sstrd 3207	. . . . . . . . . . . . . . 15 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝑤 ⊆ dom 𝐹)
28		fnssres 5403	. . . . . . . . . . . . . . 15 ⊢ ((𝐹 Fn dom 𝐹 ∧ 𝑤 ⊆ dom 𝐹) → (𝐹 ↾ 𝑤) Fn 𝑤)
29	18, 27, 28	syl2anc 411	. . . . . . . . . . . . . 14 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐹 ↾ 𝑤) Fn 𝑤)
30		tfrlem1.3	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (Fun 𝐺 ∧ 𝐴 ⊆ dom 𝐺))
31	13, 30	syl 14	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (Fun 𝐺 ∧ 𝐴 ⊆ dom 𝐺))
32	31	simpld 112	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → Fun 𝐺)
33		funfn 5315	. . . . . . . . . . . . . . . 16 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺)
34	32, 33	sylib 122	. . . . . . . . . . . . . . 15 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝐺 Fn dom 𝐺)
35	31	simprd 114	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝐴 ⊆ dom 𝐺)
36	25, 35	sstrd 3207	. . . . . . . . . . . . . . 15 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝑤 ⊆ dom 𝐺)
37		fnssres 5403	. . . . . . . . . . . . . . 15 ⊢ ((𝐺 Fn dom 𝐺 ∧ 𝑤 ⊆ dom 𝐺) → (𝐺 ↾ 𝑤) Fn 𝑤)
38	34, 36, 37	syl2anc 411	. . . . . . . . . . . . . 14 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐺 ↾ 𝑤) Fn 𝑤)
39		fveq2 5594	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑢 → (𝐹‘𝑥) = (𝐹‘𝑢))
40		fveq2 5594	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑢 → (𝐺‘𝑥) = (𝐺‘𝑢))
41	39, 40	eqeq12d 2221	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑢 → ((𝐹‘𝑥) = (𝐺‘𝑥) ↔ (𝐹‘𝑢) = (𝐺‘𝑢)))
42		simplr 528	. . . . . . . . . . . . . . . . 17 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → 𝑤 ∈ 𝑦)
43		simplr 528	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)))
44	43	ad2antrr 488	. . . . . . . . . . . . . . . . 17 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)))
45	25	adantr 276	. . . . . . . . . . . . . . . . 17 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → 𝑤 ⊆ 𝐴)
46		sseq1 3220	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑧 = 𝑤 → (𝑧 ⊆ 𝐴 ↔ 𝑤 ⊆ 𝐴))
47		raleq 2703	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑧 = 𝑤 → (∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥) ↔ ∀𝑥 ∈ 𝑤 (𝐹‘𝑥) = (𝐺‘𝑥)))
48	46, 47	imbi12d 234	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑧 = 𝑤 → ((𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)) ↔ (𝑤 ⊆ 𝐴 → ∀𝑥 ∈ 𝑤 (𝐹‘𝑥) = (𝐺‘𝑥))))
49	48	rspcv 2877	. . . . . . . . . . . . . . . . 17 ⊢ (𝑤 ∈ 𝑦 → (∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)) → (𝑤 ⊆ 𝐴 → ∀𝑥 ∈ 𝑤 (𝐹‘𝑥) = (𝐺‘𝑥))))
50	42, 44, 45, 49	syl3c 63	. . . . . . . . . . . . . . . 16 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → ∀𝑥 ∈ 𝑤 (𝐹‘𝑥) = (𝐺‘𝑥))
51		simpr 110	. . . . . . . . . . . . . . . 16 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → 𝑢 ∈ 𝑤)
52	41, 50, 51	rspcdva 2886	. . . . . . . . . . . . . . 15 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → (𝐹‘𝑢) = (𝐺‘𝑢))
53		fvres 5618	. . . . . . . . . . . . . . . 16 ⊢ (𝑢 ∈ 𝑤 → ((𝐹 ↾ 𝑤)‘𝑢) = (𝐹‘𝑢))
54	53	adantl 277	. . . . . . . . . . . . . . 15 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → ((𝐹 ↾ 𝑤)‘𝑢) = (𝐹‘𝑢))
55		fvres 5618	. . . . . . . . . . . . . . . 16 ⊢ (𝑢 ∈ 𝑤 → ((𝐺 ↾ 𝑤)‘𝑢) = (𝐺‘𝑢))
56	55	adantl 277	. . . . . . . . . . . . . . 15 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → ((𝐺 ↾ 𝑤)‘𝑢) = (𝐺‘𝑢))
57	52, 54, 56	3eqtr4d 2249	. . . . . . . . . . . . . 14 ⊢ ((((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) ∧ 𝑢 ∈ 𝑤) → ((𝐹 ↾ 𝑤)‘𝑢) = ((𝐺 ↾ 𝑤)‘𝑢))
58	29, 38, 57	eqfnfvd 5698	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐹 ↾ 𝑤) = (𝐺 ↾ 𝑤))
59	58	fveq2d 5598	. . . . . . . . . . . 12 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐵‘(𝐹 ↾ 𝑤)) = (𝐵‘(𝐺 ↾ 𝑤)))
60		fveq2 5594	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑤 → (𝐹‘𝑥) = (𝐹‘𝑤))
61		reseq2 4968	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = 𝑤 → (𝐹 ↾ 𝑥) = (𝐹 ↾ 𝑤))
62	61	fveq2d 5598	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑤 → (𝐵‘(𝐹 ↾ 𝑥)) = (𝐵‘(𝐹 ↾ 𝑤)))
63	60, 62	eqeq12d 2221	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑤 → ((𝐹‘𝑥) = (𝐵‘(𝐹 ↾ 𝑥)) ↔ (𝐹‘𝑤) = (𝐵‘(𝐹 ↾ 𝑤))))
64		tfrlem1.4	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐵‘(𝐹 ↾ 𝑥)))
65	13, 64	syl 14	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐵‘(𝐹 ↾ 𝑥)))
66		simpr 110	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → 𝑦 ⊆ 𝐴)
67	66	sselda 3197	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → 𝑤 ∈ 𝐴)
68	63, 65, 67	rspcdva 2886	. . . . . . . . . . . 12 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐹‘𝑤) = (𝐵‘(𝐹 ↾ 𝑤)))
69		fveq2 5594	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑤 → (𝐺‘𝑥) = (𝐺‘𝑤))
70		reseq2 4968	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = 𝑤 → (𝐺 ↾ 𝑥) = (𝐺 ↾ 𝑤))
71	70	fveq2d 5598	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑤 → (𝐵‘(𝐺 ↾ 𝑥)) = (𝐵‘(𝐺 ↾ 𝑤)))
72	69, 71	eqeq12d 2221	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑤 → ((𝐺‘𝑥) = (𝐵‘(𝐺 ↾ 𝑥)) ↔ (𝐺‘𝑤) = (𝐵‘(𝐺 ↾ 𝑤))))
73		tfrlem1.5	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐺‘𝑥) = (𝐵‘(𝐺 ↾ 𝑥)))
74	13, 73	syl 14	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → ∀𝑥 ∈ 𝐴 (𝐺‘𝑥) = (𝐵‘(𝐺 ↾ 𝑥)))
75	72, 74, 67	rspcdva 2886	. . . . . . . . . . . 12 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐺‘𝑤) = (𝐵‘(𝐺 ↾ 𝑤)))
76	59, 68, 75	3eqtr4d 2249	. . . . . . . . . . 11 ⊢ (((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) ∧ 𝑤 ∈ 𝑦) → (𝐹‘𝑤) = (𝐺‘𝑤))
77	76	ralrimiva 2580	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → ∀𝑤 ∈ 𝑦 (𝐹‘𝑤) = (𝐺‘𝑤))
78	60, 69	eqeq12d 2221	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑤 → ((𝐹‘𝑥) = (𝐺‘𝑥) ↔ (𝐹‘𝑤) = (𝐺‘𝑤)))
79	78	cbvralv 2739	. . . . . . . . . 10 ⊢ (∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥) ↔ ∀𝑤 ∈ 𝑦 (𝐹‘𝑤) = (𝐺‘𝑤))
80	77, 79	sylibr 134	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑦 ∈ On) ∧ ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) ∧ 𝑦 ⊆ 𝐴) → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥))
81	80	exp31 364	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ On) → (∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)) → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥))))
82	81	expcom 116	. . . . . . 7 ⊢ (𝑦 ∈ On → (𝜑 → (∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥)) → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥)))))
83	82	a2d 26	. . . . . 6 ⊢ (𝑦 ∈ On → ((𝜑 → ∀𝑧 ∈ 𝑦 (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) → (𝜑 → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥)))))
84	11, 83	biimtrid 152	. . . . 5 ⊢ (𝑦 ∈ On → (∀𝑧 ∈ 𝑦 (𝜑 → (𝑧 ⊆ 𝐴 → ∀𝑥 ∈ 𝑧 (𝐹‘𝑥) = (𝐺‘𝑥))) → (𝜑 → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥)))))
85	10, 84	tfis2 4646	. . . 4 ⊢ (𝑦 ∈ On → (𝜑 → (𝑦 ⊆ 𝐴 → ∀𝑥 ∈ 𝑦 (𝐹‘𝑥) = (𝐺‘𝑥))))
86	6, 85	vtoclga 2841	. . 3 ⊢ (𝐴 ∈ On → (𝜑 → (𝐴 ⊆ 𝐴 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))))
87	2, 86	mpcom 36	. 2 ⊢ (𝜑 → (𝐴 ⊆ 𝐴 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥)))
88	1, 87	mpi 15	1 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1373   ∈ wcel 2177  ∀wral 2485   ⊆ wss 3170  Ord word 4422  Oncon0 4423  dom cdm 4688   ↾ cres 4690  Fun wfun 5279   Fn wfn 5280  ‘cfv 5285

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-14 2180  ax-ext 2188  ax-sep 4173  ax-pow 4229  ax-pr 4264  ax-setind 4598

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ral 2490  df-rex 2491  df-rab 2494  df-v 2775  df-sbc 3003  df-csb 3098  df-un 3174  df-in 3176  df-ss 3183  df-pw 3623  df-sn 3644  df-pr 3645  df-op 3647  df-uni 3860  df-br 4055  df-opab 4117  df-mpt 4118  df-tr 4154  df-id 4353  df-iord 4426  df-on 4428  df-xp 4694  df-rel 4695  df-cnv 4696  df-co 4697  df-dm 4698  df-res 4700  df-iota 5246  df-fun 5287  df-fn 5288  df-fv 5293

This theorem is referenced by:  tfrlem5  6418