Theorem cnmpt2t 15016

Description: The composition of continuous functions is continuous. (Contributed by Mario Carneiro, 5-May-2014.) (Revised by Mario Carneiro, 22-Aug-2015.)

Hypotheses

Ref	Expression
cnmpt21.j	⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
cnmpt21.k	⊢ (𝜑 → 𝐾 ∈ (TopOn‘𝑌))
cnmpt21.a	⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿))
cnmpt2t.b	⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×t 𝐾) Cn 𝑀))

Assertion

Ref	Expression
cnmpt2t	⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨𝐴, 𝐵⟩) ∈ ((𝐽 ×t 𝐾) Cn (𝐿 ×t 𝑀)))

Distinct variable groups:   𝑥,𝑦,𝐿   𝜑,𝑥,𝑦   𝑥,𝑋,𝑦   𝑥,𝑀,𝑦   𝑥,𝑌,𝑦

Allowed substitution hints:   𝐴(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝐽(𝑥,𝑦)   𝐾(𝑥,𝑦)

Proof of Theorem cnmpt2t

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

Step	Hyp	Ref	Expression
1		fveq2 5639	. . . . . . 7 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧) = ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘⟨𝑢, 𝑣⟩))
2		df-ov 6020	. . . . . . 7 ⊢ (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣) = ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘⟨𝑢, 𝑣⟩)
3	1, 2	eqtr4di 2282	. . . . . 6 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧) = (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣))
4		fveq2 5639	. . . . . . 7 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧) = ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘⟨𝑢, 𝑣⟩))
5		df-ov 6020	. . . . . . 7 ⊢ (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣) = ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘⟨𝑢, 𝑣⟩)
6	4, 5	eqtr4di 2282	. . . . . 6 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧) = (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣))
7	3, 6	opeq12d 3870	. . . . 5 ⊢ (𝑧 = ⟨𝑢, 𝑣⟩ → ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩ = ⟨(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣), (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)⟩)
8	7	mpompt 6112	. . . 4 ⊢ (𝑧 ∈ (𝑋 × 𝑌) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) = (𝑢 ∈ 𝑋, 𝑣 ∈ 𝑌 ↦ ⟨(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣), (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)⟩)
9		nfcv 2374	. . . . . . 7 ⊢ Ⅎ𝑥𝑢
10		nfmpo1 6087	. . . . . . 7 ⊢ Ⅎ𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)
11		nfcv 2374	. . . . . . 7 ⊢ Ⅎ𝑥𝑣
12	9, 10, 11	nfov 6047	. . . . . 6 ⊢ Ⅎ𝑥(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣)
13		nfmpo1 6087	. . . . . . 7 ⊢ Ⅎ𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)
14	9, 13, 11	nfov 6047	. . . . . 6 ⊢ Ⅎ𝑥(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)
15	12, 14	nfop 3878	. . . . 5 ⊢ Ⅎ𝑥⟨(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣), (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)⟩
16		nfcv 2374	. . . . . . 7 ⊢ Ⅎ𝑦𝑢
17		nfmpo2 6088	. . . . . . 7 ⊢ Ⅎ𝑦(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)
18		nfcv 2374	. . . . . . 7 ⊢ Ⅎ𝑦𝑣
19	16, 17, 18	nfov 6047	. . . . . 6 ⊢ Ⅎ𝑦(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣)
20		nfmpo2 6088	. . . . . . 7 ⊢ Ⅎ𝑦(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)
21	16, 20, 18	nfov 6047	. . . . . 6 ⊢ Ⅎ𝑦(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)
22	19, 21	nfop 3878	. . . . 5 ⊢ Ⅎ𝑦⟨(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣), (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)⟩
23		nfcv 2374	. . . . 5 ⊢ Ⅎ𝑢⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩
24		nfcv 2374	. . . . 5 ⊢ Ⅎ𝑣⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩
25		oveq12 6026	. . . . . 6 ⊢ ((𝑢 = 𝑥 ∧ 𝑣 = 𝑦) → (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣) = (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦))
26		oveq12 6026	. . . . . 6 ⊢ ((𝑢 = 𝑥 ∧ 𝑣 = 𝑦) → (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣) = (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦))
27	25, 26	opeq12d 3870	. . . . 5 ⊢ ((𝑢 = 𝑥 ∧ 𝑣 = 𝑦) → ⟨(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣), (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)⟩ = ⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩)
28	15, 22, 23, 24, 27	cbvmpo 6099	. . . 4 ⊢ (𝑢 ∈ 𝑋, 𝑣 ∈ 𝑌 ↦ ⟨(𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑣), (𝑢(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑣)⟩) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩)
29	8, 28	eqtri 2252	. . 3 ⊢ (𝑧 ∈ (𝑋 × 𝑌) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩)
30		cnmpt21.j	. . . . 5 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
31		cnmpt21.k	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘𝑌))
32		txtopon 14985	. . . . 5 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌)) → (𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)))
33	30, 31, 32	syl2anc 411	. . . 4 ⊢ (𝜑 → (𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)))
34		toponuni 14738	. . . 4 ⊢ ((𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)) → (𝑋 × 𝑌) = ∪ (𝐽 ×t 𝐾))
35		mpteq1 4173	. . . 4 ⊢ ((𝑋 × 𝑌) = ∪ (𝐽 ×t 𝐾) → (𝑧 ∈ (𝑋 × 𝑌) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) = (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩))
36	33, 34, 35	3syl 17	. . 3 ⊢ (𝜑 → (𝑧 ∈ (𝑋 × 𝑌) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) = (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩))
37		simp2 1024	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝑥 ∈ 𝑋)
38		simp3 1025	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝑦 ∈ 𝑌)
39		cnmpt21.a	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿))
40		cntop2 14925	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿) → 𝐿 ∈ Top)
41	39, 40	syl 14	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐿 ∈ Top)
42		toptopon2 14742	. . . . . . . . . . 11 ⊢ (𝐿 ∈ Top ↔ 𝐿 ∈ (TopOn‘∪ 𝐿))
43	41, 42	sylib 122	. . . . . . . . . 10 ⊢ (𝜑 → 𝐿 ∈ (TopOn‘∪ 𝐿))
44		cnf2 14928	. . . . . . . . . 10 ⊢ (((𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)) ∧ 𝐿 ∈ (TopOn‘∪ 𝐿) ∧ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿)) → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴):(𝑋 × 𝑌)⟶∪ 𝐿)
45	33, 43, 39, 44	syl3anc 1273	. . . . . . . . 9 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴):(𝑋 × 𝑌)⟶∪ 𝐿)
46		eqid 2231	. . . . . . . . . 10 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)
47	46	fmpo 6365	. . . . . . . . 9 ⊢ (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 𝐴 ∈ ∪ 𝐿 ↔ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴):(𝑋 × 𝑌)⟶∪ 𝐿)
48	45, 47	sylibr 134	. . . . . . . 8 ⊢ (𝜑 → ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 𝐴 ∈ ∪ 𝐿)
49		rsp2 2582	. . . . . . . 8 ⊢ (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 𝐴 ∈ ∪ 𝐿 → ((𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝐴 ∈ ∪ 𝐿))
50	48, 49	syl 14	. . . . . . 7 ⊢ (𝜑 → ((𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝐴 ∈ ∪ 𝐿))
51	50	3impib 1227	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝐴 ∈ ∪ 𝐿)
52	46	ovmpt4g 6143	. . . . . 6 ⊢ ((𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌 ∧ 𝐴 ∈ ∪ 𝐿) → (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦) = 𝐴)
53	37, 38, 51, 52	syl3anc 1273	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦) = 𝐴)
54		cnmpt2t.b	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×t 𝐾) Cn 𝑀))
55		cntop2 14925	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×t 𝐾) Cn 𝑀) → 𝑀 ∈ Top)
56	54, 55	syl 14	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑀 ∈ Top)
57		toptopon2 14742	. . . . . . . . . . 11 ⊢ (𝑀 ∈ Top ↔ 𝑀 ∈ (TopOn‘∪ 𝑀))
58	56, 57	sylib 122	. . . . . . . . . 10 ⊢ (𝜑 → 𝑀 ∈ (TopOn‘∪ 𝑀))
59		cnf2 14928	. . . . . . . . . 10 ⊢ (((𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)) ∧ 𝑀 ∈ (TopOn‘∪ 𝑀) ∧ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×t 𝐾) Cn 𝑀)) → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵):(𝑋 × 𝑌)⟶∪ 𝑀)
60	33, 58, 54, 59	syl3anc 1273	. . . . . . . . 9 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵):(𝑋 × 𝑌)⟶∪ 𝑀)
61		eqid 2231	. . . . . . . . . 10 ⊢ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)
62	61	fmpo 6365	. . . . . . . . 9 ⊢ (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 𝐵 ∈ ∪ 𝑀 ↔ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵):(𝑋 × 𝑌)⟶∪ 𝑀)
63	60, 62	sylibr 134	. . . . . . . 8 ⊢ (𝜑 → ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 𝐵 ∈ ∪ 𝑀)
64		rsp2 2582	. . . . . . . 8 ⊢ (∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑌 𝐵 ∈ ∪ 𝑀 → ((𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝐵 ∈ ∪ 𝑀))
65	63, 64	syl 14	. . . . . . 7 ⊢ (𝜑 → ((𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝐵 ∈ ∪ 𝑀))
66	65	3impib 1227	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → 𝐵 ∈ ∪ 𝑀)
67	61	ovmpt4g 6143	. . . . . 6 ⊢ ((𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌 ∧ 𝐵 ∈ ∪ 𝑀) → (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦) = 𝐵)
68	37, 38, 66, 67	syl3anc 1273	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦) = 𝐵)
69	53, 68	opeq12d 3870	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑌) → ⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩ = ⟨𝐴, 𝐵⟩)
70	69	mpoeq3dva 6084	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨(𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)𝑦), (𝑥(𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)𝑦)⟩) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨𝐴, 𝐵⟩))
71	29, 36, 70	3eqtr3a 2288	. 2 ⊢ (𝜑 → (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨𝐴, 𝐵⟩))
72		eqid 2231	. . . 4 ⊢ ∪ (𝐽 ×t 𝐾) = ∪ (𝐽 ×t 𝐾)
73		eqid 2231	. . . 4 ⊢ (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) = (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩)
74	72, 73	txcnmpt 14996	. . 3 ⊢ (((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿) ∧ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵) ∈ ((𝐽 ×t 𝐾) Cn 𝑀)) → (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) ∈ ((𝐽 ×t 𝐾) Cn (𝐿 ×t 𝑀)))
75	39, 54, 74	syl2anc 411	. 2 ⊢ (𝜑 → (𝑧 ∈ ∪ (𝐽 ×t 𝐾) ↦ ⟨((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐴)‘𝑧), ((𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ 𝐵)‘𝑧)⟩) ∈ ((𝐽 ×t 𝐾) Cn (𝐿 ×t 𝑀)))
76	71, 75	eqeltrrd 2309	1 ⊢ (𝜑 → (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑌 ↦ ⟨𝐴, 𝐵⟩) ∈ ((𝐽 ×t 𝐾) Cn (𝐿 ×t 𝑀)))

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 1004   = wceq 1397   ∈ wcel 2202  ∀wral 2510  ⟨cop 3672  ∪ cuni 3893   ↦ cmpt 4150   × cxp 4723  ⟶wf 5322  ‘cfv 5326  (class class class)co 6017   ∈ cmpo 6019  Topctop 14720  TopOnctopon 14733   Cn ccn 14908   ×_t ctx 14975

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-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-ov 6020  df-oprab 6021  df-mpo 6022  df-1st 6302  df-2nd 6303  df-map 6818  df-topgen 13342  df-top 14721  df-topon 14734  df-bases 14766  df-cn 14911  df-tx 14976

This theorem is referenced by:  cnmpt22  15017  txhmeo  15042  txswaphmeo  15044