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Theorem iscatd2 16389
 Description: Version of iscatd 16381 with a uniform assumption list, for increased proof sharing capabilities. (Contributed by Mario Carneiro, 4-Jan-2017.)
Hypotheses
Ref Expression
iscatd2.b (𝜑𝐵 = (Base‘𝐶))
iscatd2.h (𝜑𝐻 = (Hom ‘𝐶))
iscatd2.o (𝜑· = (comp‘𝐶))
iscatd2.c (𝜑𝐶𝑉)
iscatd2.ps (𝜓 ↔ ((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
iscatd2.1 ((𝜑𝑦𝐵) → 1 ∈ (𝑦𝐻𝑦))
iscatd2.2 ((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓)
iscatd2.3 ((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔)
iscatd2.4 ((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧))
iscatd2.5 ((𝜑𝜓) → ((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓)))
Assertion
Ref Expression
iscatd2 (𝜑 → (𝐶 ∈ Cat ∧ (Id‘𝐶) = (𝑦𝐵1 )))
Distinct variable groups:   𝑓,𝑔,𝑘,𝑤,𝑥,𝑧, 1   𝑦,𝑓,𝐵,𝑔,𝑘,𝑤,𝑥,𝑧   𝐶,𝑔,𝑘,𝑤,𝑦,𝑧   𝑓,𝐻,𝑔,𝑘,𝑤,𝑥,𝑦,𝑧   𝜑,𝑓,𝑔,𝑘,𝑤,𝑥,𝑦,𝑧   · ,𝑓,𝑔,𝑘,𝑤,𝑥,𝑦,𝑧
Allowed substitution hints:   𝜓(𝑥,𝑦,𝑧,𝑤,𝑓,𝑔,𝑘)   𝐶(𝑥,𝑓)   1 (𝑦)   𝑉(𝑥,𝑦,𝑧,𝑤,𝑓,𝑔,𝑘)

Proof of Theorem iscatd2
Dummy variables 𝑎 𝑟 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 iscatd2.b . . 3 (𝜑𝐵 = (Base‘𝐶))
2 iscatd2.h . . 3 (𝜑𝐻 = (Hom ‘𝐶))
3 iscatd2.o . . 3 (𝜑· = (comp‘𝐶))
4 iscatd2.c . . 3 (𝜑𝐶𝑉)
5 iscatd2.1 . . 3 ((𝜑𝑦𝐵) → 1 ∈ (𝑦𝐻𝑦))
6 ne0i 3954 . . . . . . 7 ( 1 ∈ (𝑦𝐻𝑦) → (𝑦𝐻𝑦) ≠ ∅)
75, 6syl 17 . . . . . 6 ((𝜑𝑦𝐵) → (𝑦𝐻𝑦) ≠ ∅)
873ad2antr1 1246 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → (𝑦𝐻𝑦) ≠ ∅)
9 n0 3964 . . . . 5 ((𝑦𝐻𝑦) ≠ ∅ ↔ ∃𝑔 𝑔 ∈ (𝑦𝐻𝑦))
108, 9sylib 208 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → ∃𝑔 𝑔 ∈ (𝑦𝐻𝑦))
11 n0 3964 . . . . 5 ((𝑦𝐻𝑦) ≠ ∅ ↔ ∃𝑘 𝑘 ∈ (𝑦𝐻𝑦))
128, 11sylib 208 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → ∃𝑘 𝑘 ∈ (𝑦𝐻𝑦))
13 eeanv 2218 . . . . 5 (∃𝑔𝑘(𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)) ↔ (∃𝑔 𝑔 ∈ (𝑦𝐻𝑦) ∧ ∃𝑘 𝑘 ∈ (𝑦𝐻𝑦)))
14 simpll 805 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → 𝜑)
15 simplr2 1124 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → 𝑎𝐵)
16 simplr1 1123 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → 𝑦𝐵)
1715, 16jca 553 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → (𝑎𝐵𝑦𝐵))
18 simplr3 1125 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → 𝑟 ∈ (𝑎𝐻𝑦))
19 simprl 809 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → 𝑔 ∈ (𝑦𝐻𝑦))
20 simprr 811 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → 𝑘 ∈ (𝑦𝐻𝑦))
2118, 19, 203jca 1261 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))
22 iscatd2.ps . . . . . . . . . . . . . . 15 (𝜓 ↔ ((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
23 simplll 813 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → 𝑥 = 𝑎)
2423eleq1d 2715 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑥𝐵𝑎𝐵))
2524anbi1d 741 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ((𝑥𝐵𝑦𝐵) ↔ (𝑎𝐵𝑦𝐵)))
26 simpllr 815 . . . . . . . . . . . . . . . . . . 19 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → 𝑧 = 𝑦)
2726eleq1d 2715 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑧𝐵𝑦𝐵))
28 simplr 807 . . . . . . . . . . . . . . . . . . 19 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → 𝑤 = 𝑦)
2928eleq1d 2715 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑤𝐵𝑦𝐵))
3027, 29anbi12d 747 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ((𝑧𝐵𝑤𝐵) ↔ (𝑦𝐵𝑦𝐵)))
31 anidm 677 . . . . . . . . . . . . . . . . 17 ((𝑦𝐵𝑦𝐵) ↔ 𝑦𝐵)
3230, 31syl6bb 276 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ((𝑧𝐵𝑤𝐵) ↔ 𝑦𝐵))
33 simpr 476 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → 𝑓 = 𝑟)
3423oveq1d 6705 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑥𝐻𝑦) = (𝑎𝐻𝑦))
3533, 34eleq12d 2724 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑓 ∈ (𝑥𝐻𝑦) ↔ 𝑟 ∈ (𝑎𝐻𝑦)))
3626oveq2d 6706 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑦𝐻𝑧) = (𝑦𝐻𝑦))
3736eleq2d 2716 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑔 ∈ (𝑦𝐻𝑧) ↔ 𝑔 ∈ (𝑦𝐻𝑦)))
3826, 28oveq12d 6708 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑧𝐻𝑤) = (𝑦𝐻𝑦))
3938eleq2d 2716 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝑘 ∈ (𝑧𝐻𝑤) ↔ 𝑘 ∈ (𝑦𝐻𝑦)))
4035, 37, 393anbi123d 1439 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ((𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)) ↔ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))))
4125, 32, 403anbi123d 1439 . . . . . . . . . . . . . . 15 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))))
4222, 41syl5bb 272 . . . . . . . . . . . . . 14 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (𝜓 ↔ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))))
4342anbi2d 740 . . . . . . . . . . . . 13 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ((𝜑𝜓) ↔ (𝜑 ∧ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))))))
4423opeq1d 4439 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ⟨𝑥, 𝑦⟩ = ⟨𝑎, 𝑦⟩)
4544oveq1d 6705 . . . . . . . . . . . . . . 15 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (⟨𝑥, 𝑦· 𝑦) = (⟨𝑎, 𝑦· 𝑦))
46 eqidd 2652 . . . . . . . . . . . . . . 15 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → 1 = 1 )
4745, 46, 33oveq123d 6711 . . . . . . . . . . . . . 14 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟))
4847, 33eqeq12d 2666 . . . . . . . . . . . . 13 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓 ↔ ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟))
4943, 48imbi12d 333 . . . . . . . . . . . 12 ((((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) ∧ 𝑓 = 𝑟) → (((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓) ↔ ((𝜑 ∧ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)))
5049sbiedv 2438 . . . . . . . . . . 11 (((𝑥 = 𝑎𝑧 = 𝑦) ∧ 𝑤 = 𝑦) → ([𝑟 / 𝑓]((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓) ↔ ((𝜑 ∧ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)))
5150sbiedv 2438 . . . . . . . . . 10 ((𝑥 = 𝑎𝑧 = 𝑦) → ([𝑦 / 𝑤][𝑟 / 𝑓]((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓) ↔ ((𝜑 ∧ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)))
5251sbiedv 2438 . . . . . . . . 9 (𝑥 = 𝑎 → ([𝑦 / 𝑧][𝑦 / 𝑤][𝑟 / 𝑓]((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓) ↔ ((𝜑 ∧ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)))
53 iscatd2.2 . . . . . . . . . . . 12 ((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓)
5453sbt 2447 . . . . . . . . . . 11 [𝑟 / 𝑓]((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓)
5554sbt 2447 . . . . . . . . . 10 [𝑦 / 𝑤][𝑟 / 𝑓]((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓)
5655sbt 2447 . . . . . . . . 9 [𝑦 / 𝑧][𝑦 / 𝑤][𝑟 / 𝑓]((𝜑𝜓) → ( 1 (⟨𝑥, 𝑦· 𝑦)𝑓) = 𝑓)
5752, 56chvarv 2299 . . . . . . . 8 ((𝜑 ∧ ((𝑎𝐵𝑦𝐵) ∧ 𝑦𝐵 ∧ (𝑟 ∈ (𝑎𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)
5814, 17, 16, 21, 57syl13anc 1368 . . . . . . 7 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) ∧ (𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)
5958ex 449 . . . . . 6 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → ((𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟))
6059exlimdvv 1902 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → (∃𝑔𝑘(𝑔 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑦𝐻𝑦)) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟))
6113, 60syl5bir 233 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → ((∃𝑔 𝑔 ∈ (𝑦𝐻𝑦) ∧ ∃𝑘 𝑘 ∈ (𝑦𝐻𝑦)) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟))
6210, 12, 61mp2and 715 . . 3 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑎𝐻𝑦))) → ( 1 (⟨𝑎, 𝑦· 𝑦)𝑟) = 𝑟)
6373ad2antr1 1246 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → (𝑦𝐻𝑦) ≠ ∅)
64 n0 3964 . . . . 5 ((𝑦𝐻𝑦) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝑦𝐻𝑦))
6563, 64sylib 208 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → ∃𝑓 𝑓 ∈ (𝑦𝐻𝑦))
66 simpr2 1088 . . . . . 6 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → 𝑎𝐵)
677ralrimiva 2995 . . . . . . 7 (𝜑 → ∀𝑦𝐵 (𝑦𝐻𝑦) ≠ ∅)
6867adantr 480 . . . . . 6 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → ∀𝑦𝐵 (𝑦𝐻𝑦) ≠ ∅)
69 id 22 . . . . . . . . 9 (𝑦 = 𝑎𝑦 = 𝑎)
7069, 69oveq12d 6708 . . . . . . . 8 (𝑦 = 𝑎 → (𝑦𝐻𝑦) = (𝑎𝐻𝑎))
7170neeq1d 2882 . . . . . . 7 (𝑦 = 𝑎 → ((𝑦𝐻𝑦) ≠ ∅ ↔ (𝑎𝐻𝑎) ≠ ∅))
7271rspcv 3336 . . . . . 6 (𝑎𝐵 → (∀𝑦𝐵 (𝑦𝐻𝑦) ≠ ∅ → (𝑎𝐻𝑎) ≠ ∅))
7366, 68, 72sylc 65 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → (𝑎𝐻𝑎) ≠ ∅)
74 n0 3964 . . . . 5 ((𝑎𝐻𝑎) ≠ ∅ ↔ ∃𝑘 𝑘 ∈ (𝑎𝐻𝑎))
7573, 74sylib 208 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → ∃𝑘 𝑘 ∈ (𝑎𝐻𝑎))
76 eeanv 2218 . . . . 5 (∃𝑓𝑘(𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎)) ↔ (∃𝑓 𝑓 ∈ (𝑦𝐻𝑦) ∧ ∃𝑘 𝑘 ∈ (𝑎𝐻𝑎)))
77 simpll 805 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → 𝜑)
78 simplr1 1123 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → 𝑦𝐵)
79 simplr2 1124 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → 𝑎𝐵)
80 simprl 809 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → 𝑓 ∈ (𝑦𝐻𝑦))
81 simplr3 1125 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → 𝑟 ∈ (𝑦𝐻𝑎))
82 simprr 811 . . . . . . . . 9 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → 𝑘 ∈ (𝑎𝐻𝑎))
8380, 81, 823jca 1261 . . . . . . . 8 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))
84 simplll 813 . . . . . . . . . . . . . . . . . . 19 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → 𝑥 = 𝑦)
8584eleq1d 2715 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑥𝐵𝑦𝐵))
8685anbi1d 741 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝑥𝐵𝑦𝐵) ↔ (𝑦𝐵𝑦𝐵)))
8786, 31syl6bb 276 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝑥𝐵𝑦𝐵) ↔ 𝑦𝐵))
88 simpllr 815 . . . . . . . . . . . . . . . . . . 19 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → 𝑧 = 𝑎)
8988eleq1d 2715 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑧𝐵𝑎𝐵))
90 simplr 807 . . . . . . . . . . . . . . . . . . 19 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → 𝑤 = 𝑎)
9190eleq1d 2715 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑤𝐵𝑎𝐵))
9289, 91anbi12d 747 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝑧𝐵𝑤𝐵) ↔ (𝑎𝐵𝑎𝐵)))
93 anidm 677 . . . . . . . . . . . . . . . . 17 ((𝑎𝐵𝑎𝐵) ↔ 𝑎𝐵)
9492, 93syl6bb 276 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝑧𝐵𝑤𝐵) ↔ 𝑎𝐵))
9584oveq1d 6705 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑥𝐻𝑦) = (𝑦𝐻𝑦))
9695eleq2d 2716 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑓 ∈ (𝑥𝐻𝑦) ↔ 𝑓 ∈ (𝑦𝐻𝑦)))
97 simpr 476 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → 𝑔 = 𝑟)
9888oveq2d 6706 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑦𝐻𝑧) = (𝑦𝐻𝑎))
9997, 98eleq12d 2724 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑔 ∈ (𝑦𝐻𝑧) ↔ 𝑟 ∈ (𝑦𝐻𝑎)))
10088, 90oveq12d 6708 . . . . . . . . . . . . . . . . . 18 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑧𝐻𝑤) = (𝑎𝐻𝑎))
101100eleq2d 2716 . . . . . . . . . . . . . . . . 17 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑘 ∈ (𝑧𝐻𝑤) ↔ 𝑘 ∈ (𝑎𝐻𝑎)))
10296, 99, 1013anbi123d 1439 . . . . . . . . . . . . . . . 16 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)) ↔ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎))))
10387, 94, 1023anbi123d 1439 . . . . . . . . . . . . . . 15 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))))
10422, 103syl5bb 272 . . . . . . . . . . . . . 14 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝜓 ↔ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))))
105104anbi2d 740 . . . . . . . . . . . . 13 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝜑𝜓) ↔ (𝜑 ∧ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎))))))
10688oveq2d 6706 . . . . . . . . . . . . . . 15 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (⟨𝑦, 𝑦· 𝑧) = (⟨𝑦, 𝑦· 𝑎))
107 eqidd 2652 . . . . . . . . . . . . . . 15 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → 1 = 1 )
108106, 97, 107oveq123d 6711 . . . . . . . . . . . . . 14 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ))
109108, 97eqeq12d 2666 . . . . . . . . . . . . 13 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → ((𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔 ↔ (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟))
110105, 109imbi12d 333 . . . . . . . . . . . 12 ((((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) ∧ 𝑔 = 𝑟) → (((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔) ↔ ((𝜑 ∧ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)))
111110sbiedv 2438 . . . . . . . . . . 11 (((𝑥 = 𝑦𝑧 = 𝑎) ∧ 𝑤 = 𝑎) → ([𝑟 / 𝑔]((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔) ↔ ((𝜑 ∧ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)))
112111sbiedv 2438 . . . . . . . . . 10 ((𝑥 = 𝑦𝑧 = 𝑎) → ([𝑎 / 𝑤][𝑟 / 𝑔]((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔) ↔ ((𝜑 ∧ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)))
113112sbiedv 2438 . . . . . . . . 9 (𝑥 = 𝑦 → ([𝑎 / 𝑧][𝑎 / 𝑤][𝑟 / 𝑔]((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔) ↔ ((𝜑 ∧ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)))
114 iscatd2.3 . . . . . . . . . . . 12 ((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔)
115114sbt 2447 . . . . . . . . . . 11 [𝑟 / 𝑔]((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔)
116115sbt 2447 . . . . . . . . . 10 [𝑎 / 𝑤][𝑟 / 𝑔]((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔)
117116sbt 2447 . . . . . . . . 9 [𝑎 / 𝑧][𝑎 / 𝑤][𝑟 / 𝑔]((𝜑𝜓) → (𝑔(⟨𝑦, 𝑦· 𝑧) 1 ) = 𝑔)
118113, 117chvarv 2299 . . . . . . . 8 ((𝜑 ∧ (𝑦𝐵𝑎𝐵 ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑘 ∈ (𝑎𝐻𝑎)))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)
11977, 78, 79, 83, 118syl13anc 1368 . . . . . . 7 (((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) ∧ (𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)
120119ex 449 . . . . . 6 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → ((𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎)) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟))
121120exlimdvv 1902 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → (∃𝑓𝑘(𝑓 ∈ (𝑦𝐻𝑦) ∧ 𝑘 ∈ (𝑎𝐻𝑎)) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟))
12276, 121syl5bir 233 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → ((∃𝑓 𝑓 ∈ (𝑦𝐻𝑦) ∧ ∃𝑘 𝑘 ∈ (𝑎𝐻𝑎)) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟))
12365, 75, 122mp2and 715 . . 3 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑟 ∈ (𝑦𝐻𝑎))) → (𝑟(⟨𝑦, 𝑦· 𝑎) 1 ) = 𝑟)
124673ad2ant1 1102 . . . . . 6 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → ∀𝑦𝐵 (𝑦𝐻𝑦) ≠ ∅)
125 simp23 1116 . . . . . 6 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → 𝑧𝐵)
126 id 22 . . . . . . . . 9 (𝑦 = 𝑧𝑦 = 𝑧)
127126, 126oveq12d 6708 . . . . . . . 8 (𝑦 = 𝑧 → (𝑦𝐻𝑦) = (𝑧𝐻𝑧))
128127neeq1d 2882 . . . . . . 7 (𝑦 = 𝑧 → ((𝑦𝐻𝑦) ≠ ∅ ↔ (𝑧𝐻𝑧) ≠ ∅))
129128rspccva 3339 . . . . . 6 ((∀𝑦𝐵 (𝑦𝐻𝑦) ≠ ∅ ∧ 𝑧𝐵) → (𝑧𝐻𝑧) ≠ ∅)
130124, 125, 129syl2anc 694 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → (𝑧𝐻𝑧) ≠ ∅)
131 n0 3964 . . . . 5 ((𝑧𝐻𝑧) ≠ ∅ ↔ ∃𝑘 𝑘 ∈ (𝑧𝐻𝑧))
132130, 131sylib 208 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → ∃𝑘 𝑘 ∈ (𝑧𝐻𝑧))
133 eleq1 2718 . . . . . . . . . . . 12 (𝑥 = 𝑦 → (𝑥𝐵𝑦𝐵))
1341333anbi1d 1443 . . . . . . . . . . 11 (𝑥 = 𝑦 → ((𝑥𝐵𝑎𝐵𝑧𝐵) ↔ (𝑦𝐵𝑎𝐵𝑧𝐵)))
135 oveq1 6697 . . . . . . . . . . . . . 14 (𝑥 = 𝑦 → (𝑥𝐻𝑎) = (𝑦𝐻𝑎))
136135eleq2d 2716 . . . . . . . . . . . . 13 (𝑥 = 𝑦 → (𝑟 ∈ (𝑥𝐻𝑎) ↔ 𝑟 ∈ (𝑦𝐻𝑎)))
137136anbi1d 741 . . . . . . . . . . . 12 (𝑥 = 𝑦 → ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ↔ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))))
138137anbi1d 741 . . . . . . . . . . 11 (𝑥 = 𝑦 → (((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)) ↔ ((𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧))))
139134, 138anbi12d 747 . . . . . . . . . 10 (𝑥 = 𝑦 → (((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧))) ↔ ((𝑦𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))))
140139anbi2d 740 . . . . . . . . 9 (𝑥 = 𝑦 → ((𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) ↔ (𝜑 ∧ ((𝑦𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧))))))
141 opeq1 4433 . . . . . . . . . . . 12 (𝑥 = 𝑦 → ⟨𝑥, 𝑎⟩ = ⟨𝑦, 𝑎⟩)
142141oveq1d 6705 . . . . . . . . . . 11 (𝑥 = 𝑦 → (⟨𝑥, 𝑎· 𝑧) = (⟨𝑦, 𝑎· 𝑧))
143142oveqd 6707 . . . . . . . . . 10 (𝑥 = 𝑦 → (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) = (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟))
144 oveq1 6697 . . . . . . . . . 10 (𝑥 = 𝑦 → (𝑥𝐻𝑧) = (𝑦𝐻𝑧))
145143, 144eleq12d 2724 . . . . . . . . 9 (𝑥 = 𝑦 → ((𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧) ↔ (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧)))
146140, 145imbi12d 333 . . . . . . . 8 (𝑥 = 𝑦 → (((𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧)) ↔ ((𝜑 ∧ ((𝑦𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧))))
147 df-3an 1056 . . . . . . . . . . . . . . 15 (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
14822, 147bitri 264 . . . . . . . . . . . . . 14 (𝜓 ↔ (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
149 simpll 805 . . . . . . . . . . . . . . . . . . 19 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → 𝑦 = 𝑎)
150149eleq1d 2715 . . . . . . . . . . . . . . . . . 18 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑦𝐵𝑎𝐵))
151150anbi2d 740 . . . . . . . . . . . . . . . . 17 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝑥𝐵𝑦𝐵) ↔ (𝑥𝐵𝑎𝐵)))
152 simplr 807 . . . . . . . . . . . . . . . . . . . 20 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → 𝑤 = 𝑧)
153152eleq1d 2715 . . . . . . . . . . . . . . . . . . 19 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑤𝐵𝑧𝐵))
154153anbi2d 740 . . . . . . . . . . . . . . . . . 18 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝑧𝐵𝑤𝐵) ↔ (𝑧𝐵𝑧𝐵)))
155 anidm 677 . . . . . . . . . . . . . . . . . 18 ((𝑧𝐵𝑧𝐵) ↔ 𝑧𝐵)
156154, 155syl6bb 276 . . . . . . . . . . . . . . . . 17 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝑧𝐵𝑤𝐵) ↔ 𝑧𝐵))
157151, 156anbi12d 747 . . . . . . . . . . . . . . . 16 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵)) ↔ ((𝑥𝐵𝑎𝐵) ∧ 𝑧𝐵)))
158 df-3an 1056 . . . . . . . . . . . . . . . 16 ((𝑥𝐵𝑎𝐵𝑧𝐵) ↔ ((𝑥𝐵𝑎𝐵) ∧ 𝑧𝐵))
159157, 158syl6bbr 278 . . . . . . . . . . . . . . 15 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵)) ↔ (𝑥𝐵𝑎𝐵𝑧𝐵)))
160 simpr 476 . . . . . . . . . . . . . . . . . 18 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → 𝑓 = 𝑟)
161149oveq2d 6706 . . . . . . . . . . . . . . . . . 18 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑥𝐻𝑦) = (𝑥𝐻𝑎))
162160, 161eleq12d 2724 . . . . . . . . . . . . . . . . 17 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑓 ∈ (𝑥𝐻𝑦) ↔ 𝑟 ∈ (𝑥𝐻𝑎)))
163149oveq1d 6705 . . . . . . . . . . . . . . . . . 18 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑦𝐻𝑧) = (𝑎𝐻𝑧))
164163eleq2d 2716 . . . . . . . . . . . . . . . . 17 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑔 ∈ (𝑦𝐻𝑧) ↔ 𝑔 ∈ (𝑎𝐻𝑧)))
165152oveq2d 6706 . . . . . . . . . . . . . . . . . 18 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑧𝐻𝑤) = (𝑧𝐻𝑧))
166165eleq2d 2716 . . . . . . . . . . . . . . . . 17 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑘 ∈ (𝑧𝐻𝑤) ↔ 𝑘 ∈ (𝑧𝐻𝑧)))
167162, 164, 1663anbi123d 1439 . . . . . . . . . . . . . . . 16 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)) ↔ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑧))))
168 df-3an 1056 . . . . . . . . . . . . . . . 16 ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑧)) ↔ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))
169167, 168syl6bb 276 . . . . . . . . . . . . . . 15 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)) ↔ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧))))
170159, 169anbi12d 747 . . . . . . . . . . . . . 14 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))))
171148, 170syl5bb 272 . . . . . . . . . . . . 13 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝜓 ↔ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))))
172171anbi2d 740 . . . . . . . . . . . 12 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝜑𝜓) ↔ (𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧))))))
173149opeq2d 4440 . . . . . . . . . . . . . . 15 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ⟨𝑥, 𝑦⟩ = ⟨𝑥, 𝑎⟩)
174173oveq1d 6705 . . . . . . . . . . . . . 14 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (⟨𝑥, 𝑦· 𝑧) = (⟨𝑥, 𝑎· 𝑧))
175 eqidd 2652 . . . . . . . . . . . . . 14 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → 𝑔 = 𝑔)
176174, 175, 160oveq123d 6711 . . . . . . . . . . . . 13 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) = (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟))
177176eleq1d 2715 . . . . . . . . . . . 12 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → ((𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧) ↔ (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧)))
178172, 177imbi12d 333 . . . . . . . . . . 11 (((𝑦 = 𝑎𝑤 = 𝑧) ∧ 𝑓 = 𝑟) → (((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧)) ↔ ((𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧))))
179178sbiedv 2438 . . . . . . . . . 10 ((𝑦 = 𝑎𝑤 = 𝑧) → ([𝑟 / 𝑓]((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧)) ↔ ((𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧))))
180179sbiedv 2438 . . . . . . . . 9 (𝑦 = 𝑎 → ([𝑧 / 𝑤][𝑟 / 𝑓]((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧)) ↔ ((𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧))))
181 iscatd2.4 . . . . . . . . . . 11 ((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧))
182181sbt 2447 . . . . . . . . . 10 [𝑟 / 𝑓]((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧))
183182sbt 2447 . . . . . . . . 9 [𝑧 / 𝑤][𝑟 / 𝑓]((𝜑𝜓) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) ∈ (𝑥𝐻𝑧))
184180, 183chvarv 2299 . . . . . . . 8 ((𝜑 ∧ ((𝑥𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟) ∈ (𝑥𝐻𝑧))
185146, 184chvarv 2299 . . . . . . 7 ((𝜑 ∧ ((𝑦𝐵𝑎𝐵𝑧𝐵) ∧ ((𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) ∧ 𝑘 ∈ (𝑧𝐻𝑧)))) → (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧))
186185exp45 641 . . . . . 6 (𝜑 → ((𝑦𝐵𝑎𝐵𝑧𝐵) → ((𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧)) → (𝑘 ∈ (𝑧𝐻𝑧) → (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧)))))
1871863imp 1275 . . . . 5 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → (𝑘 ∈ (𝑧𝐻𝑧) → (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧)))
188187exlimdv 1901 . . . 4 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → (∃𝑘 𝑘 ∈ (𝑧𝐻𝑧) → (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧)))
189132, 188mpd 15 . . 3 ((𝜑 ∧ (𝑦𝐵𝑎𝐵𝑧𝐵) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧))) → (𝑔(⟨𝑦, 𝑎· 𝑧)𝑟) ∈ (𝑦𝐻𝑧))
190133anbi1d 741 . . . . . . 7 (𝑥 = 𝑦 → ((𝑥𝐵𝑎𝐵) ↔ (𝑦𝐵𝑎𝐵)))
191190anbi1d 741 . . . . . 6 (𝑥 = 𝑦 → (((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ↔ ((𝑦𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵))))
1921363anbi1d 1443 . . . . . 6 (𝑥 = 𝑦 → ((𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)) ↔ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
193191, 1923anbi23d 1442 . . . . 5 (𝑥 = 𝑦 → ((𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ (𝜑 ∧ ((𝑦𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)))))
194141oveq1d 6705 . . . . . . 7 (𝑥 = 𝑦 → (⟨𝑥, 𝑎· 𝑤) = (⟨𝑦, 𝑎· 𝑤))
195194oveqd 6707 . . . . . 6 (𝑥 = 𝑦 → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑦, 𝑎· 𝑤)𝑟))
196 opeq1 4433 . . . . . . . 8 (𝑥 = 𝑦 → ⟨𝑥, 𝑧⟩ = ⟨𝑦, 𝑧⟩)
197196oveq1d 6705 . . . . . . 7 (𝑥 = 𝑦 → (⟨𝑥, 𝑧· 𝑤) = (⟨𝑦, 𝑧· 𝑤))
198 eqidd 2652 . . . . . . 7 (𝑥 = 𝑦𝑘 = 𝑘)
199197, 198, 143oveq123d 6711 . . . . . 6 (𝑥 = 𝑦 → (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟)) = (𝑘(⟨𝑦, 𝑧· 𝑤)(𝑔(⟨𝑦, 𝑎· 𝑧)𝑟)))
200195, 199eqeq12d 2666 . . . . 5 (𝑥 = 𝑦 → (((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟)) ↔ ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑦, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑦, 𝑧· 𝑤)(𝑔(⟨𝑦, 𝑎· 𝑧)𝑟))))
201193, 200imbi12d 333 . . . 4 (𝑥 = 𝑦 → (((𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟))) ↔ ((𝜑 ∧ ((𝑦𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑦, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑦, 𝑧· 𝑤)(𝑔(⟨𝑦, 𝑎· 𝑧)𝑟)))))
202 simpl 472 . . . . . . . . . . . . . 14 ((𝑦 = 𝑎𝑓 = 𝑟) → 𝑦 = 𝑎)
203202eleq1d 2715 . . . . . . . . . . . . 13 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑦𝐵𝑎𝐵))
204203anbi2d 740 . . . . . . . . . . . 12 ((𝑦 = 𝑎𝑓 = 𝑟) → ((𝑥𝐵𝑦𝐵) ↔ (𝑥𝐵𝑎𝐵)))
205 simpr 476 . . . . . . . . . . . . . 14 ((𝑦 = 𝑎𝑓 = 𝑟) → 𝑓 = 𝑟)
206202oveq2d 6706 . . . . . . . . . . . . . 14 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑥𝐻𝑦) = (𝑥𝐻𝑎))
207205, 206eleq12d 2724 . . . . . . . . . . . . 13 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑓 ∈ (𝑥𝐻𝑦) ↔ 𝑟 ∈ (𝑥𝐻𝑎)))
208202oveq1d 6705 . . . . . . . . . . . . . 14 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑦𝐻𝑧) = (𝑎𝐻𝑧))
209208eleq2d 2716 . . . . . . . . . . . . 13 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑔 ∈ (𝑦𝐻𝑧) ↔ 𝑔 ∈ (𝑎𝐻𝑧)))
210207, 2093anbi12d 1440 . . . . . . . . . . . 12 ((𝑦 = 𝑎𝑓 = 𝑟) → ((𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)) ↔ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
211204, 2103anbi13d 1441 . . . . . . . . . . 11 ((𝑦 = 𝑎𝑓 = 𝑟) → (((𝑥𝐵𝑦𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑓 ∈ (𝑥𝐻𝑦) ∧ 𝑔 ∈ (𝑦𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)))))
21222, 211syl5bb 272 . . . . . . . . . 10 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝜓 ↔ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)))))
213 df-3an 1056 . . . . . . . . . 10 (((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ (((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))
214212, 213syl6bb 276 . . . . . . . . 9 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝜓 ↔ (((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)))))
215214anbi2d 740 . . . . . . . 8 ((𝑦 = 𝑎𝑓 = 𝑟) → ((𝜑𝜓) ↔ (𝜑 ∧ (((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))))))
216 3anass 1059 . . . . . . . 8 ((𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) ↔ (𝜑 ∧ (((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)))))
217215, 216syl6bbr 278 . . . . . . 7 ((𝑦 = 𝑎𝑓 = 𝑟) → ((𝜑𝜓) ↔ (𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤)))))
218202opeq2d 4440 . . . . . . . . . 10 ((𝑦 = 𝑎𝑓 = 𝑟) → ⟨𝑥, 𝑦⟩ = ⟨𝑥, 𝑎⟩)
219218oveq1d 6705 . . . . . . . . 9 ((𝑦 = 𝑎𝑓 = 𝑟) → (⟨𝑥, 𝑦· 𝑤) = (⟨𝑥, 𝑎· 𝑤))
220202opeq1d 4439 . . . . . . . . . . 11 ((𝑦 = 𝑎𝑓 = 𝑟) → ⟨𝑦, 𝑧⟩ = ⟨𝑎, 𝑧⟩)
221220oveq1d 6705 . . . . . . . . . 10 ((𝑦 = 𝑎𝑓 = 𝑟) → (⟨𝑦, 𝑧· 𝑤) = (⟨𝑎, 𝑧· 𝑤))
222221oveqd 6707 . . . . . . . . 9 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑘(⟨𝑦, 𝑧· 𝑤)𝑔) = (𝑘(⟨𝑎, 𝑧· 𝑤)𝑔))
223219, 222, 205oveq123d 6711 . . . . . . . 8 ((𝑦 = 𝑎𝑓 = 𝑟) → ((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟))
224218oveq1d 6705 . . . . . . . . . 10 ((𝑦 = 𝑎𝑓 = 𝑟) → (⟨𝑥, 𝑦· 𝑧) = (⟨𝑥, 𝑎· 𝑧))
225 eqidd 2652 . . . . . . . . . 10 ((𝑦 = 𝑎𝑓 = 𝑟) → 𝑔 = 𝑔)
226224, 225, 205oveq123d 6711 . . . . . . . . 9 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑔(⟨𝑥, 𝑦· 𝑧)𝑓) = (𝑔(⟨𝑥, 𝑎· 𝑧)𝑟))
227226oveq2d 6706 . . . . . . . 8 ((𝑦 = 𝑎𝑓 = 𝑟) → (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓)) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟)))
228223, 227eqeq12d 2666 . . . . . . 7 ((𝑦 = 𝑎𝑓 = 𝑟) → (((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓)) ↔ ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟))))
229217, 228imbi12d 333 . . . . . 6 ((𝑦 = 𝑎𝑓 = 𝑟) → (((𝜑𝜓) → ((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓))) ↔ ((𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟)))))
230229sbiedv 2438 . . . . 5 (𝑦 = 𝑎 → ([𝑟 / 𝑓]((𝜑𝜓) → ((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓))) ↔ ((𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟)))))
231 iscatd2.5 . . . . . 6 ((𝜑𝜓) → ((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓)))
232231sbt 2447 . . . . 5 [𝑟 / 𝑓]((𝜑𝜓) → ((𝑘(⟨𝑦, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑦· 𝑤)𝑓) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑦· 𝑧)𝑓)))
233230, 232chvarv 2299 . . . 4 ((𝜑 ∧ ((𝑥𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑥𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑥, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑥, 𝑧· 𝑤)(𝑔(⟨𝑥, 𝑎· 𝑧)𝑟)))
234201, 233chvarv 2299 . . 3 ((𝜑 ∧ ((𝑦𝐵𝑎𝐵) ∧ (𝑧𝐵𝑤𝐵)) ∧ (𝑟 ∈ (𝑦𝐻𝑎) ∧ 𝑔 ∈ (𝑎𝐻𝑧) ∧ 𝑘 ∈ (𝑧𝐻𝑤))) → ((𝑘(⟨𝑎, 𝑧· 𝑤)𝑔)(⟨𝑦, 𝑎· 𝑤)𝑟) = (𝑘(⟨𝑦, 𝑧· 𝑤)(𝑔(⟨𝑦, 𝑎· 𝑧)𝑟)))
2351, 2, 3, 4, 5, 62, 123, 189, 234iscatd 16381 . 2 (𝜑𝐶 ∈ Cat)
2361, 2, 3, 235, 5, 62, 123catidd 16388 . 2 (𝜑 → (Id‘𝐶) = (𝑦𝐵1 ))
237235, 236jca 553 1 (𝜑 → (𝐶 ∈ Cat ∧ (Id‘𝐶) = (𝑦𝐵1 )))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1054   = wceq 1523  ∃wex 1744  [wsb 1937   ∈ wcel 2030   ≠ wne 2823  ∀wral 2941  ∅c0 3948  ⟨cop 4216   ↦ cmpt 4762  ‘cfv 5926  (class class class)co 6690  Basecbs 15904  Hom chom 15999  compcco 16000  Catccat 16372  Idccid 16373 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pr 4936 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-sn 4211  df-pr 4213  df-op 4217  df-uni 4469  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-id 5053  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-cat 16376  df-cid 16377 This theorem is referenced by:  oppccatid  16426  subccatid  16553  fuccatid  16676  setccatid  16781  catccatid  16799  estrccatid  16819  xpccatid  16875  rngccatidALTV  42314  ringccatidALTV  42377
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