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Theorem txcnp 12480
 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 . . . . . 6 (𝜑𝐽 ∈ (TopOn‘𝑋))
2 txcnp.5 . . . . . 6 (𝜑𝐾 ∈ (TopOn‘𝑌))
3 txcnp.8 . . . . . 6 (𝜑 → (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷))
4 cnpf2 12416 . . . . . 6 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌) ∧ (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷)) → (𝑥𝑋𝐴):𝑋𝑌)
51, 2, 3, 4syl3anc 1217 . . . . 5 (𝜑 → (𝑥𝑋𝐴):𝑋𝑌)
65fvmptelrn 5581 . . . 4 ((𝜑𝑥𝑋) → 𝐴𝑌)
7 txcnp.6 . . . . . 6 (𝜑𝐿 ∈ (TopOn‘𝑍))
8 txcnp.9 . . . . . 6 (𝜑 → (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷))
9 cnpf2 12416 . . . . . 6 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐿 ∈ (TopOn‘𝑍) ∧ (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷)) → (𝑥𝑋𝐵):𝑋𝑍)
101, 7, 8, 9syl3anc 1217 . . . . 5 (𝜑 → (𝑥𝑋𝐵):𝑋𝑍)
1110fvmptelrn 5581 . . . 4 ((𝜑𝑥𝑋) → 𝐵𝑍)
126, 11opelxpd 4580 . . 3 ((𝜑𝑥𝑋) → ⟨𝐴, 𝐵⟩ ∈ (𝑌 × 𝑍))
1312fmpttd 5583 . 2 (𝜑 → (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩):𝑋⟶(𝑌 × 𝑍))
14 txcnp.7 . . . . . . . . 9 (𝜑𝐷𝑋)
15 simpr 109 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → 𝑥𝑋)
1612elexd 2702 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → ⟨𝐴, 𝐵⟩ ∈ V)
17 eqid 2140 . . . . . . . . . . . . 13 (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)
1817fvmpt2 5512 . . . . . . . . . . . 12 ((𝑥𝑋 ∧ ⟨𝐴, 𝐵⟩ ∈ V) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨𝐴, 𝐵⟩)
1915, 16, 18syl2anc 409 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨𝐴, 𝐵⟩)
20 eqid 2140 . . . . . . . . . . . . . 14 (𝑥𝑋𝐴) = (𝑥𝑋𝐴)
2120fvmpt2 5512 . . . . . . . . . . . . 13 ((𝑥𝑋𝐴𝑌) → ((𝑥𝑋𝐴)‘𝑥) = 𝐴)
2215, 6, 21syl2anc 409 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → ((𝑥𝑋𝐴)‘𝑥) = 𝐴)
23 eqid 2140 . . . . . . . . . . . . . 14 (𝑥𝑋𝐵) = (𝑥𝑋𝐵)
2423fvmpt2 5512 . . . . . . . . . . . . 13 ((𝑥𝑋𝐵𝑍) → ((𝑥𝑋𝐵)‘𝑥) = 𝐵)
2515, 11, 24syl2anc 409 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → ((𝑥𝑋𝐵)‘𝑥) = 𝐵)
2622, 25opeq12d 3721 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ = ⟨𝐴, 𝐵⟩)
2719, 26eqtr4d 2176 . . . . . . . . . 10 ((𝜑𝑥𝑋) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩)
2827ralrimiva 2508 . . . . . . . . 9 (𝜑 → ∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩)
29 nffvmpt1 5440 . . . . . . . . . . 11 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷)
30 nffvmpt1 5440 . . . . . . . . . . . 12 𝑥((𝑥𝑋𝐴)‘𝐷)
31 nffvmpt1 5440 . . . . . . . . . . . 12 𝑥((𝑥𝑋𝐵)‘𝐷)
3230, 31nfop 3729 . . . . . . . . . . 11 𝑥⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩
3329, 32nfeq 2290 . . . . . . . . . 10 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩
34 fveq2 5429 . . . . . . . . . . 11 (𝑥 = 𝐷 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷))
35 fveq2 5429 . . . . . . . . . . . 12 (𝑥 = 𝐷 → ((𝑥𝑋𝐴)‘𝑥) = ((𝑥𝑋𝐴)‘𝐷))
36 fveq2 5429 . . . . . . . . . . . 12 (𝑥 = 𝐷 → ((𝑥𝑋𝐵)‘𝑥) = ((𝑥𝑋𝐵)‘𝐷))
3735, 36opeq12d 3721 . . . . . . . . . . 11 (𝑥 = 𝐷 → ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩)
3834, 37eqeq12d 2155 . . . . . . . . . 10 (𝑥 = 𝐷 → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩))
3933, 38rspc 2787 . . . . . . . . 9 (𝐷𝑋 → (∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩))
4014, 28, 39sylc 62 . . . . . . . 8 (𝜑 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) = ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩)
4140eleq1d 2209 . . . . . . 7 (𝜑 → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) ↔ ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤)))
4241adantr 274 . . . . . 6 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) ↔ ⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤)))
431ad2antrr 480 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝐽 ∈ (TopOn‘𝑋))
442ad2antrr 480 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝐾 ∈ (TopOn‘𝑌))
4514ad2antrr 480 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝐷𝑋)
463ad2antrr 480 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → (𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷))
47 simplrl 525 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝑣𝐾)
48 simprl 521 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣)
49 icnpimaex 12420 . . . . . . . . . 10 (((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌) ∧ 𝐷𝑋) ∧ ((𝑥𝑋𝐴) ∈ ((𝐽 CnP 𝐾)‘𝐷) ∧ 𝑣𝐾 ∧ ((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣)) → ∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣))
5043, 44, 45, 46, 47, 48, 49syl33anc 1232 . . . . . . . . 9 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣))
517ad2antrr 480 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝐿 ∈ (TopOn‘𝑍))
528ad2antrr 480 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → (𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷))
53 simplrr 526 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → 𝑤𝐿)
54 simprr 522 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)
55 icnpimaex 12420 . . . . . . . . . 10 (((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐿 ∈ (TopOn‘𝑍) ∧ 𝐷𝑋) ∧ ((𝑥𝑋𝐵) ∈ ((𝐽 CnP 𝐿)‘𝐷) ∧ 𝑤𝐿 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))
5643, 51, 45, 52, 53, 54, 55syl33anc 1232 . . . . . . . . 9 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))
5750, 56jca 304 . . . . . . . 8 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤)) → (∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)))
5857ex 114 . . . . . . 7 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → ((((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤) → (∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))))
59 opelxp 4577 . . . . . . 7 (⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤) ↔ (((𝑥𝑋𝐴)‘𝐷) ∈ 𝑣 ∧ ((𝑥𝑋𝐵)‘𝐷) ∈ 𝑤))
60 reeanv 2603 . . . . . . 7 (∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) ↔ (∃𝑟𝐽 (𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ ∃𝑠𝐽 (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)))
6158, 59, 603imtr4g 204 . . . . . 6 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (⟨((𝑥𝑋𝐴)‘𝐷), ((𝑥𝑋𝐵)‘𝐷)⟩ ∈ (𝑣 × 𝑤) → ∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))))
6242, 61sylbid 149 . . . . 5 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))))
63 an4 576 . . . . . . . . . . 11 (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) ↔ ((𝐷𝑟𝐷𝑠) ∧ (((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)))
64 elin 3264 . . . . . . . . . . . . . 14 (𝐷 ∈ (𝑟𝑠) ↔ (𝐷𝑟𝐷𝑠))
6564biimpri 132 . . . . . . . . . . . . 13 ((𝐷𝑟𝐷𝑠) → 𝐷 ∈ (𝑟𝑠))
6665a1i 9 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → ((𝐷𝑟𝐷𝑠) → 𝐷 ∈ (𝑟𝑠)))
67 simpl 108 . . . . . . . . . . . . . . . 16 ((𝑟𝐽𝑠𝐽) → 𝑟𝐽)
68 toponss 12233 . . . . . . . . . . . . . . . 16 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑟𝐽) → 𝑟𝑋)
691, 67, 68syl2an 287 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑟𝐽𝑠𝐽)) → 𝑟𝑋)
70 ssinss1 3310 . . . . . . . . . . . . . . . . . . . . 21 (𝑟𝑋 → (𝑟𝑠) ⊆ 𝑋)
7170adantl 275 . . . . . . . . . . . . . . . . . . . 20 ((𝜑𝑟𝑋) → (𝑟𝑠) ⊆ 𝑋)
7271sselda 3102 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡𝑋)
7328ad2antrr 480 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩)
74 nffvmpt1 5440 . . . . . . . . . . . . . . . . . . . . 21 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡)
75 nffvmpt1 5440 . . . . . . . . . . . . . . . . . . . . . 22 𝑥((𝑥𝑋𝐴)‘𝑡)
76 nffvmpt1 5440 . . . . . . . . . . . . . . . . . . . . . 22 𝑥((𝑥𝑋𝐵)‘𝑡)
7775, 76nfop 3729 . . . . . . . . . . . . . . . . . . . . 21 𝑥⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩
7874, 77nfeq 2290 . . . . . . . . . . . . . . . . . . . 20 𝑥((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩
79 fveq2 5429 . . . . . . . . . . . . . . . . . . . . 21 (𝑥 = 𝑡 → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡))
80 fveq2 5429 . . . . . . . . . . . . . . . . . . . . . 22 (𝑥 = 𝑡 → ((𝑥𝑋𝐴)‘𝑥) = ((𝑥𝑋𝐴)‘𝑡))
81 fveq2 5429 . . . . . . . . . . . . . . . . . . . . . 22 (𝑥 = 𝑡 → ((𝑥𝑋𝐵)‘𝑥) = ((𝑥𝑋𝐵)‘𝑡))
8280, 81opeq12d 3721 . . . . . . . . . . . . . . . . . . . . 21 (𝑥 = 𝑡 → ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩)
8379, 82eqeq12d 2155 . . . . . . . . . . . . . . . . . . . 20 (𝑥 = 𝑡 → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩))
8478, 83rspc 2787 . . . . . . . . . . . . . . . . . . 19 (𝑡𝑋 → (∀𝑥𝑋 ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑥) = ⟨((𝑥𝑋𝐴)‘𝑥), ((𝑥𝑋𝐵)‘𝑥)⟩ → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩))
8572, 73, 84sylc 62 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) = ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩)
86 simpr 109 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡 ∈ (𝑟𝑠))
8786elin1d 3270 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡𝑟)
885ad2antrr 480 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑥𝑋𝐴):𝑋𝑌)
8988ffund 5284 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → Fun (𝑥𝑋𝐴))
9071adantr 274 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑟𝑠) ⊆ 𝑋)
9188fdmd 5287 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → dom (𝑥𝑋𝐴) = 𝑋)
9290, 91sseqtrrd 3141 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑟𝑠) ⊆ dom (𝑥𝑋𝐴))
9392, 86sseldd 3103 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡 ∈ dom (𝑥𝑋𝐴))
94 funfvima 5657 . . . . . . . . . . . . . . . . . . . . 21 ((Fun (𝑥𝑋𝐴) ∧ 𝑡 ∈ dom (𝑥𝑋𝐴)) → (𝑡𝑟 → ((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟)))
9589, 93, 94syl2anc 409 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑡𝑟 → ((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟)))
9687, 95mpd 13 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋𝐴)‘𝑡) ∈ ((𝑥𝑋𝐴) “ 𝑟))
9786elin2d 3271 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡𝑠)
9810ad2antrr 480 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑥𝑋𝐵):𝑋𝑍)
9998ffund 5284 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → Fun (𝑥𝑋𝐵))
10098fdmd 5287 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → dom (𝑥𝑋𝐵) = 𝑋)
10190, 100sseqtrrd 3141 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑟𝑠) ⊆ dom (𝑥𝑋𝐵))
102101, 86sseldd 3103 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → 𝑡 ∈ dom (𝑥𝑋𝐵))
103 funfvima 5657 . . . . . . . . . . . . . . . . . . . . 21 ((Fun (𝑥𝑋𝐵) ∧ 𝑡 ∈ dom (𝑥𝑋𝐵)) → (𝑡𝑠 → ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠)))
10499, 102, 103syl2anc 409 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → (𝑡𝑠 → ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠)))
10597, 104mpd 13 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋𝐵)‘𝑡) ∈ ((𝑥𝑋𝐵) “ 𝑠))
10696, 105opelxpd 4580 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ⟨((𝑥𝑋𝐴)‘𝑡), ((𝑥𝑋𝐵)‘𝑡)⟩ ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
10785, 106eqeltrd 2217 . . . . . . . . . . . . . . . . 17 (((𝜑𝑟𝑋) ∧ 𝑡 ∈ (𝑟𝑠)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
108107ralrimiva 2508 . . . . . . . . . . . . . . . 16 ((𝜑𝑟𝑋) → ∀𝑡 ∈ (𝑟𝑠)((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
10913ffund 5284 . . . . . . . . . . . . . . . . . 18 (𝜑 → Fun (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
110109adantr 274 . . . . . . . . . . . . . . . . 17 ((𝜑𝑟𝑋) → Fun (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
11113fdmd 5287 . . . . . . . . . . . . . . . . . . 19 (𝜑 → dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = 𝑋)
112111adantr 274 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑟𝑋) → dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) = 𝑋)
11371, 112sseqtrrd 3141 . . . . . . . . . . . . . . . . 17 ((𝜑𝑟𝑋) → (𝑟𝑠) ⊆ dom (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩))
114 funimass4 5480 . . . . . . . . . . . . . . . . 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))))
115110, 113, 114syl2anc 409 . . . . . . . . . . . . . . . 16 ((𝜑𝑟𝑋) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ↔ ∀𝑡 ∈ (𝑟𝑠)((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝑡) ∈ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠))))
116108, 115mpbird 166 . . . . . . . . . . . . . . 15 ((𝜑𝑟𝑋) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
11769, 116syldan 280 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑟𝐽𝑠𝐽)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
118117adantlr 469 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)))
119 xpss12 4654 . . . . . . . . . . . . 13 ((((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤) → (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ⊆ (𝑣 × 𝑤))
120 sstr2 3109 . . . . . . . . . . . . 13 (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) → ((((𝑥𝑋𝐴) “ 𝑟) × ((𝑥𝑋𝐵) “ 𝑠)) ⊆ (𝑣 × 𝑤) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))
121118, 119, 120syl2im 38 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → ((((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))
12266, 121anim12d 333 . . . . . . . . . . 11 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (((𝐷𝑟𝐷𝑠) ∧ (((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))))
12363, 122syl5bi 151 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))))
124 topontop 12221 . . . . . . . . . . . . 13 (𝐽 ∈ (TopOn‘𝑋) → 𝐽 ∈ Top)
1251, 124syl 14 . . . . . . . . . . . 12 (𝜑𝐽 ∈ Top)
126 inopn 12210 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝑟𝐽𝑠𝐽) → (𝑟𝑠) ∈ 𝐽)
1271263expb 1183 . . . . . . . . . . . 12 ((𝐽 ∈ Top ∧ (𝑟𝐽𝑠𝐽)) → (𝑟𝑠) ∈ 𝐽)
128125, 127sylan 281 . . . . . . . . . . 11 ((𝜑 ∧ (𝑟𝐽𝑠𝐽)) → (𝑟𝑠) ∈ 𝐽)
129128adantlr 469 . . . . . . . . . 10 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (𝑟𝑠) ∈ 𝐽)
130123, 129jctild 314 . . . . . . . . 9 (((𝜑 ∧ (𝑣𝐾𝑤𝐿)) ∧ (𝑟𝐽𝑠𝐽)) → (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → ((𝑟𝑠) ∈ 𝐽 ∧ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))))
131130expimpd 361 . . . . . . . 8 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑟𝐽𝑠𝐽) ∧ ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))) → ((𝑟𝑠) ∈ 𝐽 ∧ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))))
132 eleq2 2204 . . . . . . . . . 10 (𝑧 = (𝑟𝑠) → (𝐷𝑧𝐷 ∈ (𝑟𝑠)))
133 imaeq2 4885 . . . . . . . . . . 11 (𝑧 = (𝑟𝑠) → ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) = ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)))
134133sseq1d 3131 . . . . . . . . . 10 (𝑧 = (𝑟𝑠) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤) ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤)))
135132, 134anbi12d 465 . . . . . . . . 9 (𝑧 = (𝑟𝑠) → ((𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)) ↔ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))))
136135rspcev 2793 . . . . . . . 8 (((𝑟𝑠) ∈ 𝐽 ∧ (𝐷 ∈ (𝑟𝑠) ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ (𝑟𝑠)) ⊆ (𝑣 × 𝑤))) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))
137131, 136syl6 33 . . . . . . 7 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑟𝐽𝑠𝐽) ∧ ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤))) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
138137expd 256 . . . . . 6 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → ((𝑟𝐽𝑠𝐽) → (((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))))
139138rexlimdvv 2559 . . . . 5 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (∃𝑟𝐽𝑠𝐽 ((𝐷𝑟 ∧ ((𝑥𝑋𝐴) “ 𝑟) ⊆ 𝑣) ∧ (𝐷𝑠 ∧ ((𝑥𝑋𝐵) “ 𝑠) ⊆ 𝑤)) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
14062, 139syld 45 . . . 4 ((𝜑 ∧ (𝑣𝐾𝑤𝐿)) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
141140ralrimivva 2517 . . 3 (𝜑 → ∀𝑣𝐾𝑤𝐿 (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤) → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
142 vex 2692 . . . . . 6 𝑣 ∈ V
143 vex 2692 . . . . . 6 𝑤 ∈ V
144142, 143xpex 4662 . . . . 5 (𝑣 × 𝑤) ∈ V
145144rgen2w 2491 . . . 4 𝑣𝐾𝑤𝐿 (𝑣 × 𝑤) ∈ V
146 eqid 2140 . . . . 5 (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤)) = (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))
147 eleq2 2204 . . . . . 6 (𝑦 = (𝑣 × 𝑤) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ (𝑣 × 𝑤)))
148 sseq2 3126 . . . . . . . 8 (𝑦 = (𝑣 × 𝑤) → (((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦 ↔ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤)))
149148anbi2d 460 . . . . . . 7 (𝑦 = (𝑣 × 𝑤) → ((𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦) ↔ (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
150149rexbidv 2439 . . . . . 6 (𝑦 = (𝑣 × 𝑤) → (∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦) ↔ ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ (𝑣 × 𝑤))))
151147, 150imbi12d 233 . . . . 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)))))
152146, 151ralrnmpo 5893 . . . 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)))))
153145, 152ax-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))))
154141, 153sylibr 133 . 2 (𝜑 → ∀𝑦 ∈ ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))(((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩)‘𝐷) ∈ 𝑦 → ∃𝑧𝐽 (𝐷𝑧 ∧ ((𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) “ 𝑧) ⊆ 𝑦)))
155 topontop 12221 . . . . 5 (𝐾 ∈ (TopOn‘𝑌) → 𝐾 ∈ Top)
1562, 155syl 14 . . . 4 (𝜑𝐾 ∈ Top)
157 topontop 12221 . . . . 5 (𝐿 ∈ (TopOn‘𝑍) → 𝐿 ∈ Top)
1587, 157syl 14 . . . 4 (𝜑𝐿 ∈ Top)
159 eqid 2140 . . . . 5 ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤)) = ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))
160159txval 12464 . . . 4 ((𝐾 ∈ Top ∧ 𝐿 ∈ Top) → (𝐾 ×t 𝐿) = (topGen‘ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))))
161156, 158, 160syl2anc 409 . . 3 (𝜑 → (𝐾 ×t 𝐿) = (topGen‘ran (𝑣𝐾, 𝑤𝐿 ↦ (𝑣 × 𝑤))))
162 txtopon 12471 . . . 4 ((𝐾 ∈ (TopOn‘𝑌) ∧ 𝐿 ∈ (TopOn‘𝑍)) → (𝐾 ×t 𝐿) ∈ (TopOn‘(𝑌 × 𝑍)))
1632, 7, 162syl2anc 409 . . 3 (𝜑 → (𝐾 ×t 𝐿) ∈ (TopOn‘(𝑌 × 𝑍)))
1641, 161, 163, 14tgcnp 12418 . 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)))))
16513, 154, 164mpbir2and 929 1 (𝜑 → (𝑥𝑋 ↦ ⟨𝐴, 𝐵⟩) ∈ ((𝐽 CnP (𝐾 ×t 𝐿))‘𝐷))
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   = wceq 1332   ∈ wcel 1481  ∀wral 2417  ∃wrex 2418  Vcvv 2689   ∩ cin 3075   ⊆ wss 3076  ⟨cop 3535   ↦ cmpt 3997   × cxp 4545  dom cdm 4547  ran crn 4548   “ cima 4550  Fun wfun 5125  ⟶wf 5127  ‘cfv 5131  (class class class)co 5782   ∈ cmpo 5784  topGenctg 12175  Topctop 12204  TopOnctopon 12217   CnP ccnp 12395   ×t ctx 12461 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-13 1492  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-coll 4051  ax-sep 4054  ax-pow 4106  ax-pr 4139  ax-un 4363  ax-setind 4460 This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-fal 1338  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ne 2310  df-ral 2422  df-rex 2423  df-reu 2424  df-rab 2426  df-v 2691  df-sbc 2914  df-csb 3008  df-dif 3078  df-un 3080  df-in 3082  df-ss 3089  df-nul 3369  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-uni 3745  df-iun 3823  df-br 3938  df-opab 3998  df-mpt 3999  df-id 4223  df-xp 4553  df-rel 4554  df-cnv 4555  df-co 4556  df-dm 4557  df-rn 4558  df-res 4559  df-ima 4560  df-iota 5096  df-fun 5133  df-fn 5134  df-f 5135  df-f1 5136  df-fo 5137  df-f1o 5138  df-fv 5139  df-ov 5785  df-oprab 5786  df-mpo 5787  df-1st 6046  df-2nd 6047  df-map 6552  df-topgen 12181  df-top 12205  df-topon 12218  df-bases 12250  df-cnp 12398  df-tx 12462 This theorem is referenced by: (None)
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