Theorem ofpreima 30428

Description: Express the preimage of a function operation as a union of preimages. (Contributed by Thierry Arnoux, 8-Mar-2018.)

Hypotheses

Ref	Expression
ofpreima.1	⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
ofpreima.2	⊢ (𝜑 → 𝐺:𝐴⟶𝐶)
ofpreima.3	⊢ (𝜑 → 𝐴 ∈ 𝑉)
ofpreima.4	⊢ (𝜑 → 𝑅 Fn (𝐵 × 𝐶))

Assertion

Ref	Expression
ofpreima	⊢ (𝜑 → (◡(𝐹 ∘f 𝑅𝐺) “ 𝐷) = ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})))

Distinct variable groups:   𝐴,𝑝   𝐷,𝑝   𝐹,𝑝   𝐺,𝑝   𝑅,𝑝   𝜑,𝑝

Allowed substitution hints:   𝐵(𝑝)   𝐶(𝑝)   𝑉(𝑝)

Proof of Theorem ofpreima

Dummy variables 𝑞 𝑠 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nfmpt1 5128	. . . . . . 7 ⊢ Ⅎ𝑠(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)
2		ofpreima.1	. . . . . . 7 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
3		ofpreima.2	. . . . . . 7 ⊢ (𝜑 → 𝐺:𝐴⟶𝐶)
4		ofpreima.3	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
5		eqidd 2799	. . . . . . 7 ⊢ (𝜑 → (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) = (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩))
6		ofpreima.4	. . . . . . . 8 ⊢ (𝜑 → 𝑅 Fn (𝐵 × 𝐶))
7		fnov 7261	. . . . . . . 8 ⊢ (𝑅 Fn (𝐵 × 𝐶) ↔ 𝑅 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐶 ↦ (𝑥𝑅𝑦)))
8	6, 7	sylib 221	. . . . . . 7 ⊢ (𝜑 → 𝑅 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐶 ↦ (𝑥𝑅𝑦)))
9	1, 2, 3, 4, 5, 8	ofoprabco 30427	. . . . . 6 ⊢ (𝜑 → (𝐹 ∘f 𝑅𝐺) = (𝑅 ∘ (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)))
10	9	cnveqd 5710	. . . . 5 ⊢ (𝜑 → ◡(𝐹 ∘f 𝑅𝐺) = ◡(𝑅 ∘ (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)))
11		cnvco 5720	. . . . 5 ⊢ ◡(𝑅 ∘ (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)) = (◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∘ ◡𝑅)
12	10, 11	eqtrdi 2849	. . . 4 ⊢ (𝜑 → ◡(𝐹 ∘f 𝑅𝐺) = (◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∘ ◡𝑅))
13	12	imaeq1d 5895	. . 3 ⊢ (𝜑 → (◡(𝐹 ∘f 𝑅𝐺) “ 𝐷) = ((◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∘ ◡𝑅) “ 𝐷))
14		imaco 6071	. . 3 ⊢ ((◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∘ ◡𝑅) “ 𝐷) = (◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) “ (◡𝑅 “ 𝐷))
15	13, 14	eqtrdi 2849	. 2 ⊢ (𝜑 → (◡(𝐹 ∘f 𝑅𝐺) “ 𝐷) = (◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) “ (◡𝑅 “ 𝐷)))
16		dfima2 5898	. . 3 ⊢ (◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) “ (◡𝑅 “ 𝐷)) = {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑝◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑞}
17		vex 3444	. . . . . . . 8 ⊢ 𝑝 ∈ V
18		vex 3444	. . . . . . . 8 ⊢ 𝑞 ∈ V
19	17, 18	brcnv 5717	. . . . . . 7 ⊢ (𝑝◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑞 ↔ 𝑞(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑝)
20		funmpt 6362	. . . . . . . . 9 ⊢ Fun (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)
21		funbrfv2b 6698	. . . . . . . . 9 ⊢ (Fun (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) → (𝑞(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑝 ↔ (𝑞 ∈ dom (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∧ ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝)))
22	20, 21	ax-mp 5	. . . . . . . 8 ⊢ (𝑞(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑝 ↔ (𝑞 ∈ dom (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∧ ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝))
23		opex 5321	. . . . . . . . . . 11 ⊢ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩ ∈ V
24		eqid 2798	. . . . . . . . . . 11 ⊢ (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) = (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)
25	23, 24	dmmpti 6464	. . . . . . . . . 10 ⊢ dom (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) = 𝐴
26	25	eleq2i 2881	. . . . . . . . 9 ⊢ (𝑞 ∈ dom (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ↔ 𝑞 ∈ 𝐴)
27	26	anbi1i 626	. . . . . . . 8 ⊢ ((𝑞 ∈ dom (𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) ∧ ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝) ↔ (𝑞 ∈ 𝐴 ∧ ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝))
28	22, 27	bitri 278	. . . . . . 7 ⊢ (𝑞(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑝 ↔ (𝑞 ∈ 𝐴 ∧ ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝))
29		fveq2 6645	. . . . . . . . . . 11 ⊢ (𝑠 = 𝑞 → (𝐹‘𝑠) = (𝐹‘𝑞))
30		fveq2 6645	. . . . . . . . . . 11 ⊢ (𝑠 = 𝑞 → (𝐺‘𝑠) = (𝐺‘𝑞))
31	29, 30	opeq12d 4773	. . . . . . . . . 10 ⊢ (𝑠 = 𝑞 → ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩ = ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩)
32		opex 5321	. . . . . . . . . 10 ⊢ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ ∈ V
33	31, 24, 32	fvmpt 6745	. . . . . . . . 9 ⊢ (𝑞 ∈ 𝐴 → ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩)
34	33	eqeq1d 2800	. . . . . . . 8 ⊢ (𝑞 ∈ 𝐴 → (((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝 ↔ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝))
35	34	pm5.32i 578	. . . . . . 7 ⊢ ((𝑞 ∈ 𝐴 ∧ ((𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)‘𝑞) = 𝑝) ↔ (𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝))
36	19, 28, 35	3bitri 300	. . . . . 6 ⊢ (𝑝◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑞 ↔ (𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝))
37	36	rexbii 3210	. . . . 5 ⊢ (∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑝◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑞 ↔ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝))
38	37	abbii 2863	. . . 4 ⊢ {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑝◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑞} = {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)}
39		nfv 1915	. . . . 5 ⊢ Ⅎ𝑞𝜑
40		nfab1 2957	. . . . 5 ⊢ Ⅎ𝑞{𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)}
41		nfcv 2955	. . . . 5 ⊢ Ⅎ𝑞∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)}))
42		eliun 4885	. . . . . 6 ⊢ (𝑞 ∈ ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ ∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})))
43		ffn 6487	. . . . . . . . . . . . 13 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴)
44		fniniseg 6807	. . . . . . . . . . . . 13 ⊢ (𝐹 Fn 𝐴 → (𝑞 ∈ (◡𝐹 “ {(1st ‘𝑝)}) ↔ (𝑞 ∈ 𝐴 ∧ (𝐹‘𝑞) = (1st ‘𝑝))))
45	2, 43, 44	3syl 18	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑞 ∈ (◡𝐹 “ {(1st ‘𝑝)}) ↔ (𝑞 ∈ 𝐴 ∧ (𝐹‘𝑞) = (1st ‘𝑝))))
46		ffn 6487	. . . . . . . . . . . . 13 ⊢ (𝐺:𝐴⟶𝐶 → 𝐺 Fn 𝐴)
47		fniniseg 6807	. . . . . . . . . . . . 13 ⊢ (𝐺 Fn 𝐴 → (𝑞 ∈ (◡𝐺 “ {(2nd ‘𝑝)}) ↔ (𝑞 ∈ 𝐴 ∧ (𝐺‘𝑞) = (2nd ‘𝑝))))
48	3, 46, 47	3syl 18	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑞 ∈ (◡𝐺 “ {(2nd ‘𝑝)}) ↔ (𝑞 ∈ 𝐴 ∧ (𝐺‘𝑞) = (2nd ‘𝑝))))
49	45, 48	anbi12d 633	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑞 ∈ (◡𝐹 “ {(1st ‘𝑝)}) ∧ 𝑞 ∈ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ ((𝑞 ∈ 𝐴 ∧ (𝐹‘𝑞) = (1st ‘𝑝)) ∧ (𝑞 ∈ 𝐴 ∧ (𝐺‘𝑞) = (2nd ‘𝑝)))))
50		elin 3897	. . . . . . . . . . 11 ⊢ (𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ (𝑞 ∈ (◡𝐹 “ {(1st ‘𝑝)}) ∧ 𝑞 ∈ (◡𝐺 “ {(2nd ‘𝑝)})))
51		anandi 675	. . . . . . . . . . 11 ⊢ ((𝑞 ∈ 𝐴 ∧ ((𝐹‘𝑞) = (1st ‘𝑝) ∧ (𝐺‘𝑞) = (2nd ‘𝑝))) ↔ ((𝑞 ∈ 𝐴 ∧ (𝐹‘𝑞) = (1st ‘𝑝)) ∧ (𝑞 ∈ 𝐴 ∧ (𝐺‘𝑞) = (2nd ‘𝑝))))
52	49, 50, 51	3bitr4g 317	. . . . . . . . . 10 ⊢ (𝜑 → (𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ (𝑞 ∈ 𝐴 ∧ ((𝐹‘𝑞) = (1st ‘𝑝) ∧ (𝐺‘𝑞) = (2nd ‘𝑝)))))
53	52	adantr 484	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑝 ∈ (◡𝑅 “ 𝐷)) → (𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ (𝑞 ∈ 𝐴 ∧ ((𝐹‘𝑞) = (1st ‘𝑝) ∧ (𝐺‘𝑞) = (2nd ‘𝑝)))))
54		cnvimass 5916	. . . . . . . . . . . . . 14 ⊢ (◡𝑅 “ 𝐷) ⊆ dom 𝑅
55	6	fndmd 6427	. . . . . . . . . . . . . 14 ⊢ (𝜑 → dom 𝑅 = (𝐵 × 𝐶))
56	54, 55	sseqtrid 3967	. . . . . . . . . . . . 13 ⊢ (𝜑 → (◡𝑅 “ 𝐷) ⊆ (𝐵 × 𝐶))
57	56	sselda 3915	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑝 ∈ (◡𝑅 “ 𝐷)) → 𝑝 ∈ (𝐵 × 𝐶))
58		1st2nd2 7710	. . . . . . . . . . . 12 ⊢ (𝑝 ∈ (𝐵 × 𝐶) → 𝑝 = ⟨(1st ‘𝑝), (2nd ‘𝑝)⟩)
59		eqeq2 2810	. . . . . . . . . . . 12 ⊢ (𝑝 = ⟨(1st ‘𝑝), (2nd ‘𝑝)⟩ → (⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝 ↔ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = ⟨(1st ‘𝑝), (2nd ‘𝑝)⟩))
60	57, 58, 59	3syl 18	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑝 ∈ (◡𝑅 “ 𝐷)) → (⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝 ↔ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = ⟨(1st ‘𝑝), (2nd ‘𝑝)⟩))
61		fvex 6658	. . . . . . . . . . . 12 ⊢ (𝐹‘𝑞) ∈ V
62		fvex 6658	. . . . . . . . . . . 12 ⊢ (𝐺‘𝑞) ∈ V
63	61, 62	opth 5333	. . . . . . . . . . 11 ⊢ (⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = ⟨(1st ‘𝑝), (2nd ‘𝑝)⟩ ↔ ((𝐹‘𝑞) = (1st ‘𝑝) ∧ (𝐺‘𝑞) = (2nd ‘𝑝)))
64	60, 63	syl6bb 290	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑝 ∈ (◡𝑅 “ 𝐷)) → (⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝 ↔ ((𝐹‘𝑞) = (1st ‘𝑝) ∧ (𝐺‘𝑞) = (2nd ‘𝑝))))
65	64	anbi2d 631	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑝 ∈ (◡𝑅 “ 𝐷)) → ((𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝) ↔ (𝑞 ∈ 𝐴 ∧ ((𝐹‘𝑞) = (1st ‘𝑝) ∧ (𝐺‘𝑞) = (2nd ‘𝑝)))))
66	53, 65	bitr4d 285	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑝 ∈ (◡𝑅 “ 𝐷)) → (𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ (𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)))
67	66	rexbidva 3255	. . . . . . 7 ⊢ (𝜑 → (∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)))
68		abid 2780	. . . . . . 7 ⊢ (𝑞 ∈ {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)} ↔ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝))
69	67, 68	syl6bbr 292	. . . . . 6 ⊢ (𝜑 → (∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑞 ∈ ((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})) ↔ 𝑞 ∈ {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)}))
70	42, 69	syl5rbb 287	. . . . 5 ⊢ (𝜑 → (𝑞 ∈ {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)} ↔ 𝑞 ∈ ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)}))))
71	39, 40, 41, 70	eqrd 3934	. . . 4 ⊢ (𝜑 → {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)(𝑞 ∈ 𝐴 ∧ ⟨(𝐹‘𝑞), (𝐺‘𝑞)⟩ = 𝑝)} = ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})))
72	38, 71	syl5eq 2845	. . 3 ⊢ (𝜑 → {𝑞 ∣ ∃𝑝 ∈ (◡𝑅 “ 𝐷)𝑝◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩)𝑞} = ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})))
73	16, 72	syl5eq 2845	. 2 ⊢ (𝜑 → (◡(𝑠 ∈ 𝐴 ↦ ⟨(𝐹‘𝑠), (𝐺‘𝑠)⟩) “ (◡𝑅 “ 𝐷)) = ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})))
74	15, 73	eqtrd 2833	1 ⊢ (𝜑 → (◡(𝐹 ∘f 𝑅𝐺) “ 𝐷) = ∪ 𝑝 ∈ (◡𝑅 “ 𝐷)((◡𝐹 “ {(1st ‘𝑝)}) ∩ (◡𝐺 “ {(2nd ‘𝑝)})))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1538   ∈ wcel 2111  {cab 2776  ∃wrex 3107   ∩ cin 3880  {csn 4525  ⟨cop 4531  ∪ ciun 4881   class class class wbr 5030   ↦ cmpt 5110   × cxp 5517  ^◡ccnv 5518  dom cdm 5519   “ cima 5522   ∘ ccom 5523  Fun wfun 6318   Fn wfn 6319  ⟶wf 6320  ‘cfv 6324  (class class class)co 7135   ∈ cmpo 7137   ∘_f cof 7387  1^st c1st 7669  2^nd c2nd 7670

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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4801  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-id 5425  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-ov 7138  df-oprab 7139  df-mpo 7140  df-of 7389  df-1st 7671  df-2nd 7672

This theorem is referenced by:  ofpreima2  30429