MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  txcnp Structured version   Visualization version   GIF version

Theorem txcnp 21625
Description: If two functions are continuous at 𝐷, then the ordered pair of them is continuous at 𝐷 into the product topology. (Contributed by Mario Carneiro, 9-Aug-2014.) (Revised by Mario Carneiro, 22-Aug-2015.)
Hypotheses
Ref Expression
txcnp.4 (𝜑𝐽 ∈ (TopOn‘𝑋))
txcnp.5 (𝜑𝐾 ∈ (TopOn‘𝑌))
txcnp.6 (𝜑𝐿 ∈ (TopOn‘𝑍))
txcnp.7 (𝜑𝐷𝑋)
txcnp.8 (𝜑 → (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷))
txcnp.9 (𝜑 → (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷))
Assertion
Ref Expression
txcnp (𝜑 → (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) ∈ ((𝐽 CnP (𝐾 ×t 𝐿))‘𝐷))
Distinct variable groups:   𝜑,𝑥   𝑥,𝑌   𝑥,𝑍   𝑥,𝐷   𝑥,𝑋
Allowed substitution hints:   𝐴(𝑥)   𝐵(𝑥)   𝐽(𝑥)   𝐾(𝑥)   𝐿(𝑥)

Proof of Theorem txcnp
Dummy variables 𝑠 𝑟 𝑡 𝑣 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 txcnp.4 . . . . . . 7 (𝜑𝐽 ∈ (TopOn‘𝑋))
2 txcnp.5 . . . . . . 7 (𝜑𝐾 ∈ (TopOn‘𝑌))
3 txcnp.8 . . . . . . 7 (𝜑 → (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷))
4 cnpf2 21256 . . . . . . 7 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌) ∧ (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷)) → (𝑥𝑋𝐴):𝑋𝑌)
51, 2, 3, 4syl3anc 1477 . . . . . 6 (𝜑 → (𝑥𝑋𝐴):𝑋𝑌)
6 eqid 2760 . . . . . . 7 (𝑥𝑋𝐴) = (𝑥𝑋𝐴)
76fmpt 6544 . . . . . 6 (∀𝑥𝑋 𝐴𝑌 ↔ (𝑥𝑋𝐴):𝑋𝑌)
85, 7sylibr 224 . . . . 5 (𝜑 → ∀𝑥𝑋 𝐴𝑌)
98r19.21bi 3070 . . . 4 ((𝜑𝑥𝑋) → 𝐴𝑌)
10 txcnp.6 . . . . . . 7 (𝜑𝐿 ∈ (TopOn‘𝑍))
11 txcnp.9 . . . . . . 7 (𝜑 → (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷))
12 cnpf2 21256 . . . . . . 7 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐿 ∈ (TopOn‘𝑍) ∧ (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷)) → (𝑥𝑋𝐵):𝑋𝑍)
131, 10, 11, 12syl3anc 1477 . . . . . 6 (𝜑 → (𝑥𝑋𝐵):𝑋𝑍)
14 eqid 2760 . . . . . . 7 (𝑥𝑋𝐵) = (𝑥𝑋𝐵)
1514fmpt 6544 . . . . . 6 (∀𝑥𝑋 𝐵𝑍 ↔ (𝑥𝑋𝐵):𝑋𝑍)
1613, 15sylibr 224 . . . . 5 (𝜑 → ∀𝑥𝑋 𝐵𝑍)
1716r19.21bi 3070 . . . 4 ((𝜑𝑥𝑋) → 𝐵𝑍)
18 opelxpi 5305 . . . 4 ((𝐴𝑌𝐵𝑍) → ⟨𝐴, 𝐵⟩ ∈ (𝑌 × 𝑍))
199, 17, 18syl2anc 696 . . 3 ((𝜑𝑥𝑋) → ⟨𝐴, 𝐵⟩ ∈ (𝑌 × 𝑍))
20 eqid 2760 . . 3 (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)
2119, 20fmptd 6548 . 2 (𝜑 → (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩):𝑋⟶(𝑌 × 𝑍))
22 txcnp.7 . . . . . . . . 9 (𝜑𝐷𝑋)
23 simpr 479 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → 𝑥𝑋)
24 opex 5081 . . . . . . . . . . . 12 𝐴, 𝐵⟩ ∈ V
2520fvmpt2 6453 . . . . . . . . . . . 12 ((𝑥𝑋 ∧ ⟨𝐴, 𝐵⟩ ∈ V) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨𝐴, 𝐵⟩)
2623, 24, 25sylancl 697 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨𝐴, 𝐵⟩)
276fvmpt2 6453 . . . . . . . . . . . . 13 ((𝑥𝑋𝐴𝑌) → ((𝑥𝑋𝐴)‘𝑥) = 𝐴)
2823, 9, 27syl2anc 696 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → ((𝑥𝑋𝐴)‘𝑥) = 𝐴)
2914fvmpt2 6453 . . . . . . . . . . . . 13 ((𝑥𝑋𝐵𝑍) → ((𝑥𝑋𝐵)‘𝑥) = 𝐵)
3023, 17, 29syl2anc 696 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → ((𝑥𝑋𝐵)‘𝑥) = 𝐵)
3128, 30opeq12d 4561 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ = ⟨𝐴, 𝐵⟩)
3226, 31eqtr4d 2797 . . . . . . . . . 10 ((𝜑𝑥𝑋) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩)
3332ralrimiva 3104 . . . . . . . . 9 (𝜑 → ∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩)
34 nffvmpt1 6360 . . . . . . . . . . 11 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷)
35 nffvmpt1 6360 . . . . . . . . . . . 12 𝑥((𝑥𝑋𝐴)‘𝐷)
36 nffvmpt1 6360 . . . . . . . . . . . 12 𝑥((𝑥𝑋𝐵)‘𝐷)
3735, 36nfop 4569 . . . . . . . . . . 11 𝑥⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩
3834, 37nfeq 2914 . . . . . . . . . 10 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩
39 fveq2 6352 . . . . . . . . . . 11 (𝑥 = 𝐷 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷))
40 fveq2 6352 . . . . . . . . . . . 12 (𝑥 = 𝐷 → ((𝑥𝑋𝐴)‘𝑥) = ((𝑥𝑋𝐴)‘𝐷))
41 fveq2 6352 . . . . . . . . . . . 12 (𝑥 = 𝐷 → ((𝑥𝑋𝐵)‘𝑥) = ((𝑥𝑋𝐵)‘𝐷))
4240, 41opeq12d 4561 . . . . . . . . . . 11 (𝑥 = 𝐷 → ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩)
4339, 42eqeq12d 2775 . . . . . . . . . 10 (𝑥 = 𝐷 → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩))
4438, 43rspc 3443 . . . . . . . . 9 (𝐷𝑋 → (∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩))
4522, 33, 44sylc 65 . . . . . . . 8 (𝜑 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩)
4645eleq1d 2824 . . . . . . 7 (𝜑 → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) ↔ ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤)))
4746adantr 472 . . . . . 6 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) ↔ ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤)))
483ad2antrr 764 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷))
49 simplrl 819 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝑣𝐾)
50 simprl 811 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣)
51 cnpimaex 21262 . . . . . . . . . 10 (((𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷) ∧ 𝑣𝐾 ∧ ((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣) → ∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣))
5248, 49, 50, 51syl3anc 1477 . . . . . . . . 9 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣))
5311ad2antrr 764 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷))
54 simplrr 820 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝑤𝐿)
55 simprr 813 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)
56 cnpimaex 21262 . . . . . . . . . 10 (((𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷) ∧ 𝑤𝐿 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤) → ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))
5753, 54, 55, 56syl3anc 1477 . . . . . . . . 9 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))
5852, 57jca 555 . . . . . . . 8 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → (∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)))
5958ex 449 . . . . . . 7 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → ((((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤) → (∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))))
60 opelxp 5303 . . . . . . 7 (⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤) ↔ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤))
61 reeanv 3245 . . . . . . 7 (∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) ↔ (∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)))
6259, 60, 613imtr4g 285 . . . . . 6 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤) → ∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))))
6347, 62sylbid 230 . . . . 5 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))))
64 an4 900 . . . . . . . . . . 11 (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) ↔ ((𝐷𝑟𝐷𝑠) ∧ (((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)))
65 elin 3939 . . . . . . . . . . . . . 14 (𝐷 ∈ (𝑟𝑠) ↔ (𝐷𝑟𝐷𝑠))
6665biimpri 218 . . . . . . . . . . . . 13 ((𝐷𝑟𝐷𝑠) → 𝐷 ∈ (𝑟𝑠))
6766a1i 11 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → ((𝐷𝑟𝐷𝑠) → 𝐷 ∈ (𝑟𝑠)))
68 simpl 474 . . . . . . . . . . . . . . . 16 ((𝑟𝐽𝑠𝐽) → 𝑟𝐽)
69 toponss 20933 . . . . . . . . . . . . . . . 16 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑟𝐽) → 𝑟𝑋)
701, 68, 69syl2an 495 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑟𝐽𝑠𝐽)) → 𝑟𝑋)
71 ssinss1 3984 . . . . . . . . . . . . . . . . . . . . 21 (𝑟𝑋 → (𝑟𝑠) ⊆ 𝑋)
7271adantl 473 . . . . . . . . . . . . . . . . . . . 20 ((𝜑𝑟𝑋) → (𝑟𝑠) ⊆ 𝑋)
7372sselda 3744 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡𝑋)
7433ad2antrr 764 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩)
75 nffvmpt1 6360 . . . . . . . . . . . . . . . . . . . . 21 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡)
76 nffvmpt1 6360 . . . . . . . . . . . . . . . . . . . . . 22 𝑥((𝑥𝑋𝐴)‘𝑡)
77 nffvmpt1 6360 . . . . . . . . . . . . . . . . . . . . . 22 𝑥((𝑥𝑋𝐵)‘𝑡)
7876, 77nfop 4569 . . . . . . . . . . . . . . . . . . . . 21 𝑥⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩
7975, 78nfeq 2914 . . . . . . . . . . . . . . . . . . . 20 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩
80 fveq2 6352 . . . . . . . . . . . . . . . . . . . . 21 (𝑥 = 𝑡 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡))
81 fveq2 6352 . . . . . . . . . . . . . . . . . . . . . 22 (𝑥 = 𝑡 → ((𝑥𝑋𝐴)‘𝑥) = ((𝑥𝑋𝐴)‘𝑡))
82 fveq2 6352 . . . . . . . . . . . . . . . . . . . . . 22 (𝑥 = 𝑡 → ((𝑥𝑋𝐵)‘𝑥) = ((𝑥𝑋𝐵)‘𝑡))
8381, 82opeq12d 4561 . . . . . . . . . . . . . . . . . . . . 21 (𝑥 = 𝑡 → ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩)
8480, 83eqeq12d 2775 . . . . . . . . . . . . . . . . . . . 20 (𝑥 = 𝑡 → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩))
8579, 84rspc 3443 . . . . . . . . . . . . . . . . . . 19 (𝑡𝑋 → (∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩))
8673, 74, 85sylc 65 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩)
87 inss1 3976 . . . . . . . . . . . . . . . . . . . . 21 (𝑟𝑠) ⊆ 𝑟
88 simpr 479 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡 ∈ (𝑟𝑠))
8987, 88sseldi 3742 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡𝑟)
905ad2antrr 764 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑥𝑋𝐴):𝑋𝑌)
91 ffun 6209 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑥𝑋𝐴):𝑋𝑌 → Fun (𝑥𝑋𝐴))
9290, 91syl 17 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → Fun (𝑥𝑋𝐴))
9372adantr 472 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑟𝑠) ⊆ 𝑋)
94 fdm 6212 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑥𝑋𝐴):𝑋𝑌 → dom (𝑥𝑋𝐴) = 𝑋)
9590, 94syl 17 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → dom (𝑥𝑋𝐴) = 𝑋)
9693, 95sseqtr4d 3783 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑟𝑠) ⊆ dom (𝑥𝑋𝐴))
9796, 88sseldd 3745 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡 ∈ dom (𝑥𝑋𝐴))
98 funfvima 6655 . . . . . . . . . . . . . . . . . . . . 21 ((Fun (𝑥𝑋𝐴) ∧ 𝑡 ∈ dom (𝑥𝑋𝐴)) → (𝑡𝑟 → ((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟)))
9992, 97, 98syl2anc 696 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑡𝑟 → ((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟)))
10089, 99mpd 15 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟))
101 inss2 3977 . . . . . . . . . . . . . . . . . . . . 21 (𝑟𝑠) ⊆ 𝑠
102101, 88sseldi 3742 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡𝑠)
10313ad2antrr 764 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑥𝑋𝐵):𝑋𝑍)
104 ffun 6209 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑥𝑋𝐵):𝑋𝑍 → Fun (𝑥𝑋𝐵))
105103, 104syl 17 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → Fun (𝑥𝑋𝐵))
106 fdm 6212 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑥𝑋𝐵):𝑋𝑍 → dom (𝑥𝑋𝐵) = 𝑋)
107103, 106syl 17 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → dom (𝑥𝑋𝐵) = 𝑋)
10893, 107sseqtr4d 3783 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑟𝑠) ⊆ dom (𝑥𝑋𝐵))
109108, 88sseldd 3745 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡 ∈ dom (𝑥𝑋𝐵))
110 funfvima 6655 . . . . . . . . . . . . . . . . . . . . 21 ((Fun (𝑥𝑋𝐵) ∧ 𝑡 ∈ dom (𝑥𝑋𝐵)) → (𝑡𝑠 → ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠)))
111105, 109, 110syl2anc 696 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑡𝑠 → ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠)))
112102, 111mpd 15 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠))
113 opelxpi 5305 . . . . . . . . . . . . . . . . . . 19 ((((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟) ∧ ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠)) → ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩ ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
114100, 112, 113syl2anc 696 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩ ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
11586, 114eqeltrd 2839 . . . . . . . . . . . . . . . . 17 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
116115ralrimiva 3104 . . . . . . . . . . . . . . . 16 ((𝜑𝑟𝑋) → ∀𝑡 ∈ (𝑟𝑠)((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
117 ffun 6209 . . . . . . . . . . . . . . . . . . 19 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩):𝑋⟶(𝑌 × 𝑍) → Fun (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
11821, 117syl 17 . . . . . . . . . . . . . . . . . 18 (𝜑 → Fun (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
119118adantr 472 . . . . . . . . . . . . . . . . 17 ((𝜑𝑟𝑋) → Fun (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
120 fdm 6212 . . . . . . . . . . . . . . . . . . . 20 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩):𝑋⟶(𝑌 × 𝑍) → dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = 𝑋)
12121, 120syl 17 . . . . . . . . . . . . . . . . . . 19 (𝜑 → dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = 𝑋)
122121adantr 472 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑟𝑋) → dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = 𝑋)
12372, 122sseqtr4d 3783 . . . . . . . . . . . . . . . . 17 ((𝜑𝑟𝑋) → (𝑟𝑠) ⊆ dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
124 funimass4 6409 . . . . . . . . . . . . . . . . 17 ((Fun (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) ∧ (𝑟𝑠) ⊆ dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ↔ ∀𝑡 ∈ (𝑟𝑠)((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠))))
125119, 123, 124syl2anc 696 . . . . . . . . . . . . . . . 16 ((𝜑𝑟𝑋) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ↔ ∀𝑡 ∈ (𝑟𝑠)((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠))))
126116, 125mpbird 247 . . . . . . . . . . . . . . 15 ((𝜑𝑟𝑋) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
12770, 126syldan 488 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑟𝐽𝑠𝐽)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
128127adantlr 753 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
129 xpss12 5281 . . . . . . . . . . . . 13 ((((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤) → (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ⊆ (𝑣 × 𝑤))
130 sstr2 3751 . . . . . . . . . . . . 13 (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) → ((((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ⊆ (𝑣 × 𝑤) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))
131128, 129, 130syl2im 40 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → ((((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))
13267, 131anim12d 587 . . . . . . . . . . 11 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (((𝐷𝑟𝐷𝑠) ∧ (((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))))
13364, 132syl5bi 232 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))))
134 topontop 20920 . . . . . . . . . . . . 13 (𝐽 ∈ (TopOn‘𝑋) → 𝐽 ∈ Top)
1351, 134syl 17 . . . . . . . . . . . 12 (𝜑𝐽 ∈ Top)
136 inopn 20906 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝑟𝐽𝑠𝐽) → (𝑟𝑠) ∈ 𝐽)
1371363expb 1114 . . . . . . . . . . . 12 ((𝐽 ∈ Top ∧ (𝑟𝐽𝑠𝐽)) → (𝑟𝑠) ∈ 𝐽)
138135, 137sylan 489 . . . . . . . . . . 11 ((𝜑 ∧ (𝑟𝐽𝑠𝐽)) → (𝑟𝑠) ∈ 𝐽)
139138adantlr 753 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (𝑟𝑠) ∈ 𝐽)
140133, 139jctild 567 . . . . . . . . 9 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → ((𝑟𝑠) ∈ 𝐽 ∧ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))))
141140expimpd 630 . . . . . . . 8 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑟𝐽𝑠𝐽) ∧ ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))) → ((𝑟𝑠) ∈ 𝐽 ∧ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))))
142 eleq2 2828 . . . . . . . . . 10 (𝑧 = (𝑟𝑠) → (𝐷𝑧𝐷 ∈ (𝑟𝑠)))
143 imaeq2 5620 . . . . . . . . . . 11 (𝑧 = (𝑟𝑠) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) = ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)))
144143sseq1d 3773 . . . . . . . . . 10 (𝑧 = (𝑟𝑠) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤) ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))
145142, 144anbi12d 749 . . . . . . . . 9 (𝑧 = (𝑟𝑠) → ((𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)) ↔ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))))
146145rspcev 3449 . . . . . . . 8 (((𝑟𝑠) ∈ 𝐽 ∧ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))
147141, 146syl6 35 . . . . . . 7 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑟𝐽𝑠𝐽) ∧ ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
148147expd 451 . . . . . 6 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → ((𝑟𝐽𝑠𝐽) → (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))))
149148rexlimdvv 3175 . . . . 5 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
15063, 149syld 47 . . . 4 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
151150ralrimivva 3109 . . 3 (𝜑 → ∀𝑣𝐾𝑤𝐿 (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
152 vex 3343 . . . . . 6 𝑣 ∈ V
153 vex 3343 . . . . . 6 𝑤 ∈ V
154152, 153xpex 7127 . . . . 5 (𝑣 × 𝑤) ∈ V
155154rgen2w 3063 . . . 4 𝑣𝐾𝑤𝐿 (𝑣 × 𝑤) ∈ V
156 eqid 2760 . . . . 5 (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤)) = (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))
157 eleq2 2828 . . . . . 6 (𝑦 = (𝑣 × 𝑤) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤)))
158 sseq2 3768 . . . . . . . 8 (𝑦 = (𝑣 × 𝑤) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦 ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))
159158anbi2d 742 . . . . . . 7 (𝑦 = (𝑣 × 𝑤) → ((𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦) ↔ (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
160159rexbidv 3190 . . . . . 6 (𝑦 = (𝑣 × 𝑤) → (∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦) ↔ ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
161157, 160imbi12d 333 . . . . 5 (𝑦 = (𝑣 × 𝑤) → ((((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦)) ↔ (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))))
162156, 161ralrnmpt2 6940 . . . 4 (∀𝑣𝐾𝑤𝐿 (𝑣 × 𝑤) ∈ V → (∀𝑦 ∈ ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))(((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦)) ↔ ∀𝑣𝐾𝑤𝐿 (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))))
163155, 162ax-mp 5 . . 3 (∀𝑦 ∈ ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))(((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦)) ↔ ∀𝑣𝐾𝑤𝐿 (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
164151, 163sylibr 224 . 2 (𝜑 → ∀𝑦 ∈ ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))(((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦)))
165 topontop 20920 . . . . 5 (𝐾 ∈ (TopOn‘𝑌) → 𝐾 ∈ Top)
1662, 165syl 17 . . . 4 (𝜑𝐾 ∈ Top)
167 topontop 20920 . . . . 5 (𝐿 ∈ (TopOn‘𝑍) → 𝐿 ∈ Top)
16810, 167syl 17 . . . 4 (𝜑𝐿 ∈ Top)
169 eqid 2760 . . . . 5 ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤)) = ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))
170169txval 21569 . . . 4 ((𝐾 ∈ Top ∧ 𝐿 ∈ Top) → (𝐾 ×t 𝐿) = (topGen‘ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))))
171166, 168, 170syl2anc 696 . . 3 (𝜑 → (𝐾 ×t 𝐿) = (topGen‘ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))))
172 txtopon 21596 . . . 4 ((𝐾 ∈ (TopOn‘𝑌) ∧ 𝐿 ∈ (TopOn‘𝑍)) → (𝐾 ×t 𝐿) ∈ (TopOn‘(𝑌 × 𝑍)))
1732, 10, 172syl2anc 696 . . 3 (𝜑 → (𝐾 ×t 𝐿) ∈ (TopOn‘(𝑌 × 𝑍)))
1741, 171, 173, 22tgcnp 21259 . 2 (𝜑 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) ∈ ((𝐽 CnP (𝐾 ×t 𝐿))‘𝐷) ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩):𝑋⟶(𝑌 × 𝑍) ∧ ∀𝑦 ∈ ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))(((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦)))))
17521, 164, 174mpbir2and 995 1 (𝜑 → (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) ∈ ((𝐽 CnP (𝐾 ×t 𝐿))‘𝐷))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383   = wceq 1632  wcel 2139  wral 3050  wrex 3051  Vcvv 3340  cin 3714  wss 3715  cop 4327  cmpt 4881   × cxp 5264  dom cdm 5266  ran crn 5267  cima 5269  Fun wfun 6043  wf 6045  cfv 6049  (class class class)co 6813  cmpt2 6815  topGenctg 16300  Topctop 20900  TopOnctopon 20917   CnP ccnp 21231   ×t ctx 21565
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7114
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-sbc 3577  df-csb 3675  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-iun 4674  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-iota 6012  df-fun 6051  df-fn 6052  df-f 6053  df-fv 6057  df-ov 6816  df-oprab 6817  df-mpt2 6818  df-1st 7333  df-2nd 7334  df-map 8025  df-topgen 16306  df-top 20901  df-topon 20918  df-bases 20952  df-cnp 21234  df-tx 21567
This theorem is referenced by:  limccnp2  23855
  Copyright terms: Public domain W3C validator