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Theorem tpres 6507
Description: An unordered triple of ordered pairs restricted to all but one first components of the pairs is an unordered pair of ordered pairs. (Contributed by AV, 14-Mar-2020.)
Hypotheses
Ref Expression
tpres.t (𝜑𝑇 = {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})
tpres.b (𝜑𝐵𝑉)
tpres.c (𝜑𝐶𝑉)
tpres.e (𝜑𝐸𝑉)
tpres.f (𝜑𝐹𝑉)
tpres.1 (𝜑𝐵𝐴)
tpres.2 (𝜑𝐶𝐴)
Assertion
Ref Expression
tpres (𝜑 → (𝑇 ↾ (V ∖ {𝐴})) = {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})

Proof of Theorem tpres
Dummy variables 𝑎 𝑏 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-res 5155 . 2 (𝑇 ↾ (V ∖ {𝐴})) = (𝑇 ∩ ((V ∖ {𝐴}) × V))
2 elin 3829 . . . 4 (𝑥 ∈ (𝑇 ∩ ((V ∖ {𝐴}) × V)) ↔ (𝑥𝑇𝑥 ∈ ((V ∖ {𝐴}) × V)))
3 elxp 5165 . . . . . 6 (𝑥 ∈ ((V ∖ {𝐴}) × V) ↔ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)))
43anbi2i 730 . . . . 5 ((𝑥𝑇𝑥 ∈ ((V ∖ {𝐴}) × V)) ↔ (𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))))
5 tpres.t . . . . . . . . 9 (𝜑𝑇 = {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})
65eleq2d 2716 . . . . . . . 8 (𝜑 → (𝑥𝑇𝑥 ∈ {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}))
7 vex 3234 . . . . . . . . . . . . 13 𝑥 ∈ V
87eltp 4262 . . . . . . . . . . . 12 (𝑥 ∈ {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} ↔ (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
9 eldifsn 4350 . . . . . . . . . . . . . . . . . . . 20 (𝑎 ∈ (V ∖ {𝐴}) ↔ (𝑎 ∈ V ∧ 𝑎𝐴))
10 eqeq1 2655 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑥 = ⟨𝑎, 𝑏⟩ → (𝑥 = ⟨𝐴, 𝐷⟩ ↔ ⟨𝑎, 𝑏⟩ = ⟨𝐴, 𝐷⟩))
1110adantl 481 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑎𝐴𝑥 = ⟨𝑎, 𝑏⟩) → (𝑥 = ⟨𝐴, 𝐷⟩ ↔ ⟨𝑎, 𝑏⟩ = ⟨𝐴, 𝐷⟩))
12 vex 3234 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 𝑎 ∈ V
13 vex 3234 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 𝑏 ∈ V
1412, 13opth 4974 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (⟨𝑎, 𝑏⟩ = ⟨𝐴, 𝐷⟩ ↔ (𝑎 = 𝐴𝑏 = 𝐷))
15 eqneqall 2834 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑎 = 𝐴 → (𝑎𝐴 → (𝑏 = 𝐷 → (𝜑 → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))))
1615com12 32 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑎𝐴 → (𝑎 = 𝐴 → (𝑏 = 𝐷 → (𝜑 → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))))
1716impd 446 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑎𝐴 → ((𝑎 = 𝐴𝑏 = 𝐷) → (𝜑 → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
1814, 17syl5bi 232 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑎𝐴 → (⟨𝑎, 𝑏⟩ = ⟨𝐴, 𝐷⟩ → (𝜑 → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
1918adantr 480 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑎𝐴𝑥 = ⟨𝑎, 𝑏⟩) → (⟨𝑎, 𝑏⟩ = ⟨𝐴, 𝐷⟩ → (𝜑 → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
2011, 19sylbid 230 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑎𝐴𝑥 = ⟨𝑎, 𝑏⟩) → (𝑥 = ⟨𝐴, 𝐷⟩ → (𝜑 → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
2120impd 446 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑎𝐴𝑥 = ⟨𝑎, 𝑏⟩) → ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
2221ex 449 . . . . . . . . . . . . . . . . . . . . 21 (𝑎𝐴 → (𝑥 = ⟨𝑎, 𝑏⟩ → ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
2322adantl 481 . . . . . . . . . . . . . . . . . . . 20 ((𝑎 ∈ V ∧ 𝑎𝐴) → (𝑥 = ⟨𝑎, 𝑏⟩ → ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
249, 23sylbi 207 . . . . . . . . . . . . . . . . . . 19 (𝑎 ∈ (V ∖ {𝐴}) → (𝑥 = ⟨𝑎, 𝑏⟩ → ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
2524adantr 480 . . . . . . . . . . . . . . . . . 18 ((𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V) → (𝑥 = ⟨𝑎, 𝑏⟩ → ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
2625impcom 445 . . . . . . . . . . . . . . . . 17 ((𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
2726com12 32 . . . . . . . . . . . . . . . 16 ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → ((𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
2827exlimdvv 1902 . . . . . . . . . . . . . . 15 ((𝑥 = ⟨𝐴, 𝐷⟩ ∧ 𝜑) → (∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
2928ex 449 . . . . . . . . . . . . . 14 (𝑥 = ⟨𝐴, 𝐷⟩ → (𝜑 → (∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))))
3029impd 446 . . . . . . . . . . . . 13 (𝑥 = ⟨𝐴, 𝐷⟩ → ((𝜑 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
31 orc 399 . . . . . . . . . . . . . 14 (𝑥 = ⟨𝐵, 𝐸⟩ → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
3231a1d 25 . . . . . . . . . . . . 13 (𝑥 = ⟨𝐵, 𝐸⟩ → ((𝜑 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
33 olc 398 . . . . . . . . . . . . . 14 (𝑥 = ⟨𝐶, 𝐹⟩ → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
3433a1d 25 . . . . . . . . . . . . 13 (𝑥 = ⟨𝐶, 𝐹⟩ → ((𝜑 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
3530, 32, 343jaoi 1431 . . . . . . . . . . . 12 ((𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) → ((𝜑 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
368, 35sylbi 207 . . . . . . . . . . 11 (𝑥 ∈ {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} → ((𝜑 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
377elpr 4231 . . . . . . . . . . 11 (𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} ↔ (𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
3836, 37syl6ibr 242 . . . . . . . . . 10 (𝑥 ∈ {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} → ((𝜑 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}))
3938expd 451 . . . . . . . . 9 (𝑥 ∈ {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} → (𝜑 → (∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})))
4039com12 32 . . . . . . . 8 (𝜑 → (𝑥 ∈ {⟨𝐴, 𝐷⟩, ⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} → (∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})))
416, 40sylbid 230 . . . . . . 7 (𝜑 → (𝑥𝑇 → (∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) → 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})))
4241impd 446 . . . . . 6 (𝜑 → ((𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) → 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}))
43 3mix2 1251 . . . . . . . . . . . . 13 (𝑥 = ⟨𝐵, 𝐸⟩ → (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
44 3mix3 1252 . . . . . . . . . . . . 13 (𝑥 = ⟨𝐶, 𝐹⟩ → (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
4543, 44jaoi 393 . . . . . . . . . . . 12 ((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) → (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
4645adantr 480 . . . . . . . . . . 11 (((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) ∧ 𝜑) → (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩))
476, 8syl6bb 276 . . . . . . . . . . . 12 (𝜑 → (𝑥𝑇 ↔ (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
4847adantl 481 . . . . . . . . . . 11 (((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) ∧ 𝜑) → (𝑥𝑇 ↔ (𝑥 = ⟨𝐴, 𝐷⟩ ∨ 𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩)))
4946, 48mpbird 247 . . . . . . . . . 10 (((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) ∧ 𝜑) → 𝑥𝑇)
50 tpres.b . . . . . . . . . . . . . . . 16 (𝜑𝐵𝑉)
51 elex 3243 . . . . . . . . . . . . . . . 16 (𝐵𝑉𝐵 ∈ V)
5250, 51syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐵 ∈ V)
53 tpres.1 . . . . . . . . . . . . . . 15 (𝜑𝐵𝐴)
54 tpres.e . . . . . . . . . . . . . . . 16 (𝜑𝐸𝑉)
55 elex 3243 . . . . . . . . . . . . . . . 16 (𝐸𝑉𝐸 ∈ V)
5654, 55syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐸 ∈ V)
5752, 53, 56jca31 556 . . . . . . . . . . . . . 14 (𝜑 → ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V))
5857anim2i 592 . . . . . . . . . . . . 13 ((𝑥 = ⟨𝐵, 𝐸⟩ ∧ 𝜑) → (𝑥 = ⟨𝐵, 𝐸⟩ ∧ ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V)))
59 opeq12 4435 . . . . . . . . . . . . . . . . . 18 ((𝑎 = 𝐵𝑏 = 𝐸) → ⟨𝑎, 𝑏⟩ = ⟨𝐵, 𝐸⟩)
6059eqeq2d 2661 . . . . . . . . . . . . . . . . 17 ((𝑎 = 𝐵𝑏 = 𝐸) → (𝑥 = ⟨𝑎, 𝑏⟩ ↔ 𝑥 = ⟨𝐵, 𝐸⟩))
61 eleq1 2718 . . . . . . . . . . . . . . . . . . 19 (𝑎 = 𝐵 → (𝑎 ∈ V ↔ 𝐵 ∈ V))
62 neeq1 2885 . . . . . . . . . . . . . . . . . . 19 (𝑎 = 𝐵 → (𝑎𝐴𝐵𝐴))
6361, 62anbi12d 747 . . . . . . . . . . . . . . . . . 18 (𝑎 = 𝐵 → ((𝑎 ∈ V ∧ 𝑎𝐴) ↔ (𝐵 ∈ V ∧ 𝐵𝐴)))
64 eleq1 2718 . . . . . . . . . . . . . . . . . 18 (𝑏 = 𝐸 → (𝑏 ∈ V ↔ 𝐸 ∈ V))
6563, 64bi2anan9 935 . . . . . . . . . . . . . . . . 17 ((𝑎 = 𝐵𝑏 = 𝐸) → (((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V) ↔ ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V)))
6660, 65anbi12d 747 . . . . . . . . . . . . . . . 16 ((𝑎 = 𝐵𝑏 = 𝐸) → ((𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)) ↔ (𝑥 = ⟨𝐵, 𝐸⟩ ∧ ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V))))
6766spc2egv 3326 . . . . . . . . . . . . . . 15 ((𝐵𝑉𝐸𝑉) → ((𝑥 = ⟨𝐵, 𝐸⟩ ∧ ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V)) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))))
6850, 54, 67syl2anc 694 . . . . . . . . . . . . . 14 (𝜑 → ((𝑥 = ⟨𝐵, 𝐸⟩ ∧ ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V)) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))))
6968adantl 481 . . . . . . . . . . . . 13 ((𝑥 = ⟨𝐵, 𝐸⟩ ∧ 𝜑) → ((𝑥 = ⟨𝐵, 𝐸⟩ ∧ ((𝐵 ∈ V ∧ 𝐵𝐴) ∧ 𝐸 ∈ V)) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))))
7058, 69mpd 15 . . . . . . . . . . . 12 ((𝑥 = ⟨𝐵, 𝐸⟩ ∧ 𝜑) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)))
71 tpres.c . . . . . . . . . . . . . . . 16 (𝜑𝐶𝑉)
72 elex 3243 . . . . . . . . . . . . . . . 16 (𝐶𝑉𝐶 ∈ V)
7371, 72syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐶 ∈ V)
74 tpres.2 . . . . . . . . . . . . . . 15 (𝜑𝐶𝐴)
75 tpres.f . . . . . . . . . . . . . . . 16 (𝜑𝐹𝑉)
76 elex 3243 . . . . . . . . . . . . . . . 16 (𝐹𝑉𝐹 ∈ V)
7775, 76syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐹 ∈ V)
7873, 74, 77jca31 556 . . . . . . . . . . . . . 14 (𝜑 → ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V))
7978anim2i 592 . . . . . . . . . . . . 13 ((𝑥 = ⟨𝐶, 𝐹⟩ ∧ 𝜑) → (𝑥 = ⟨𝐶, 𝐹⟩ ∧ ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V)))
80 opeq12 4435 . . . . . . . . . . . . . . . . . 18 ((𝑎 = 𝐶𝑏 = 𝐹) → ⟨𝑎, 𝑏⟩ = ⟨𝐶, 𝐹⟩)
8180eqeq2d 2661 . . . . . . . . . . . . . . . . 17 ((𝑎 = 𝐶𝑏 = 𝐹) → (𝑥 = ⟨𝑎, 𝑏⟩ ↔ 𝑥 = ⟨𝐶, 𝐹⟩))
82 eleq1 2718 . . . . . . . . . . . . . . . . . . 19 (𝑎 = 𝐶 → (𝑎 ∈ V ↔ 𝐶 ∈ V))
83 neeq1 2885 . . . . . . . . . . . . . . . . . . 19 (𝑎 = 𝐶 → (𝑎𝐴𝐶𝐴))
8482, 83anbi12d 747 . . . . . . . . . . . . . . . . . 18 (𝑎 = 𝐶 → ((𝑎 ∈ V ∧ 𝑎𝐴) ↔ (𝐶 ∈ V ∧ 𝐶𝐴)))
85 eleq1 2718 . . . . . . . . . . . . . . . . . 18 (𝑏 = 𝐹 → (𝑏 ∈ V ↔ 𝐹 ∈ V))
8684, 85bi2anan9 935 . . . . . . . . . . . . . . . . 17 ((𝑎 = 𝐶𝑏 = 𝐹) → (((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V) ↔ ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V)))
8781, 86anbi12d 747 . . . . . . . . . . . . . . . 16 ((𝑎 = 𝐶𝑏 = 𝐹) → ((𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)) ↔ (𝑥 = ⟨𝐶, 𝐹⟩ ∧ ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V))))
8887spc2egv 3326 . . . . . . . . . . . . . . 15 ((𝐶𝑉𝐹𝑉) → ((𝑥 = ⟨𝐶, 𝐹⟩ ∧ ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V)) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))))
8971, 75, 88syl2anc 694 . . . . . . . . . . . . . 14 (𝜑 → ((𝑥 = ⟨𝐶, 𝐹⟩ ∧ ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V)) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))))
9089adantl 481 . . . . . . . . . . . . 13 ((𝑥 = ⟨𝐶, 𝐹⟩ ∧ 𝜑) → ((𝑥 = ⟨𝐶, 𝐹⟩ ∧ ((𝐶 ∈ V ∧ 𝐶𝐴) ∧ 𝐹 ∈ V)) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))))
9179, 90mpd 15 . . . . . . . . . . . 12 ((𝑥 = ⟨𝐶, 𝐹⟩ ∧ 𝜑) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)))
9270, 91jaoian 841 . . . . . . . . . . 11 (((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) ∧ 𝜑) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)))
939anbi1i 731 . . . . . . . . . . . . 13 ((𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V) ↔ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V))
9493anbi2i 730 . . . . . . . . . . . 12 ((𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) ↔ (𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)))
95942exbii 1815 . . . . . . . . . . 11 (∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)) ↔ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ ((𝑎 ∈ V ∧ 𝑎𝐴) ∧ 𝑏 ∈ V)))
9692, 95sylibr 224 . . . . . . . . . 10 (((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) ∧ 𝜑) → ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)))
9749, 96jca 553 . . . . . . . . 9 (((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) ∧ 𝜑) → (𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))))
9897ex 449 . . . . . . . 8 ((𝑥 = ⟨𝐵, 𝐸⟩ ∨ 𝑥 = ⟨𝐶, 𝐹⟩) → (𝜑 → (𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)))))
9937, 98sylbi 207 . . . . . . 7 (𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} → (𝜑 → (𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)))))
10099com12 32 . . . . . 6 (𝜑 → (𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩} → (𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V)))))
10142, 100impbid 202 . . . . 5 (𝜑 → ((𝑥𝑇 ∧ ∃𝑎𝑏(𝑥 = ⟨𝑎, 𝑏⟩ ∧ (𝑎 ∈ (V ∖ {𝐴}) ∧ 𝑏 ∈ V))) ↔ 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}))
1024, 101syl5bb 272 . . . 4 (𝜑 → ((𝑥𝑇𝑥 ∈ ((V ∖ {𝐴}) × V)) ↔ 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}))
1032, 102syl5bb 272 . . 3 (𝜑 → (𝑥 ∈ (𝑇 ∩ ((V ∖ {𝐴}) × V)) ↔ 𝑥 ∈ {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩}))
104103eqrdv 2649 . 2 (𝜑 → (𝑇 ∩ ((V ∖ {𝐴}) × V)) = {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})
1051, 104syl5eq 2697 1 (𝜑 → (𝑇 ↾ (V ∖ {𝐴})) = {⟨𝐵, 𝐸⟩, ⟨𝐶, 𝐹⟩})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wo 382  wa 383  w3o 1053   = wceq 1523  wex 1744  wcel 2030  wne 2823  Vcvv 3231  cdif 3604  cin 3606  {csn 4210  {cpr 4212  {ctp 4214  cop 4216   × cxp 5141  cres 5145
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-sep 4814  ax-nul 4822  ax-pr 4936
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-rab 2950  df-v 3233  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-tp 4215  df-op 4217  df-opab 4746  df-xp 5149  df-res 5155
This theorem is referenced by:  estrres  16826
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