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Theorem r0weon 8779
Description: A set-like well-ordering of the class of ordinal pairs. Proposition 7.58(1) of [TakeutiZaring] p. 54. (Contributed by Mario Carneiro, 7-Mar-2013.) (Revised by Mario Carneiro, 26-Jun-2015.)
Hypotheses
Ref Expression
leweon.1 𝐿 = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (On × On) ∧ 𝑦 ∈ (On × On)) ∧ ((1st𝑥) ∈ (1st𝑦) ∨ ((1st𝑥) = (1st𝑦) ∧ (2nd𝑥) ∈ (2nd𝑦))))}
r0weon.1 𝑅 = {⟨𝑧, 𝑤⟩ ∣ ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤)) ∨ (((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤)) ∧ 𝑧𝐿𝑤)))}
Assertion
Ref Expression
r0weon (𝑅 We (On × On) ∧ 𝑅 Se (On × On))
Distinct variable groups:   𝑧,𝑤,𝐿   𝑥,𝑤,𝑦,𝑧
Allowed substitution hints:   𝑅(𝑥,𝑦,𝑧,𝑤)   𝐿(𝑥,𝑦)

Proof of Theorem r0weon
Dummy variable 𝑢 is distinct from all other variables.
StepHypRef Expression
1 r0weon.1 . . . . 5 𝑅 = {⟨𝑧, 𝑤⟩ ∣ ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤)) ∨ (((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤)) ∧ 𝑧𝐿𝑤)))}
2 fveq2 6148 . . . . . . . . . . . 12 (𝑥 = 𝑧 → (1st𝑥) = (1st𝑧))
3 fveq2 6148 . . . . . . . . . . . 12 (𝑥 = 𝑧 → (2nd𝑥) = (2nd𝑧))
42, 3uneq12d 3746 . . . . . . . . . . 11 (𝑥 = 𝑧 → ((1st𝑥) ∪ (2nd𝑥)) = ((1st𝑧) ∪ (2nd𝑧)))
5 eqid 2621 . . . . . . . . . . 11 (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) = (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))
6 fvex 6158 . . . . . . . . . . . 12 (1st𝑧) ∈ V
7 fvex 6158 . . . . . . . . . . . 12 (2nd𝑧) ∈ V
86, 7unex 6909 . . . . . . . . . . 11 ((1st𝑧) ∪ (2nd𝑧)) ∈ V
94, 5, 8fvmpt 6239 . . . . . . . . . 10 (𝑧 ∈ (On × On) → ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((1st𝑧) ∪ (2nd𝑧)))
10 fveq2 6148 . . . . . . . . . . . 12 (𝑥 = 𝑤 → (1st𝑥) = (1st𝑤))
11 fveq2 6148 . . . . . . . . . . . 12 (𝑥 = 𝑤 → (2nd𝑥) = (2nd𝑤))
1210, 11uneq12d 3746 . . . . . . . . . . 11 (𝑥 = 𝑤 → ((1st𝑥) ∪ (2nd𝑥)) = ((1st𝑤) ∪ (2nd𝑤)))
13 fvex 6158 . . . . . . . . . . . 12 (1st𝑤) ∈ V
14 fvex 6158 . . . . . . . . . . . 12 (2nd𝑤) ∈ V
1513, 14unex 6909 . . . . . . . . . . 11 ((1st𝑤) ∪ (2nd𝑤)) ∈ V
1612, 5, 15fvmpt 6239 . . . . . . . . . 10 (𝑤 ∈ (On × On) → ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) = ((1st𝑤) ∪ (2nd𝑤)))
179, 16breqan12d 4629 . . . . . . . . 9 ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) → (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) E ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ↔ ((1st𝑧) ∪ (2nd𝑧)) E ((1st𝑤) ∪ (2nd𝑤))))
1815epelc 4987 . . . . . . . . 9 (((1st𝑧) ∪ (2nd𝑧)) E ((1st𝑤) ∪ (2nd𝑤)) ↔ ((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤)))
1917, 18syl6bb 276 . . . . . . . 8 ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) → (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) E ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ↔ ((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤))))
209, 16eqeqan12d 2637 . . . . . . . . 9 ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) → (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ↔ ((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤))))
2120anbi1d 740 . . . . . . . 8 ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) → ((((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∧ 𝑧𝐿𝑤) ↔ (((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤)) ∧ 𝑧𝐿𝑤)))
2219, 21orbi12d 745 . . . . . . 7 ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) → ((((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) E ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∨ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∧ 𝑧𝐿𝑤)) ↔ (((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤)) ∨ (((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤)) ∧ 𝑧𝐿𝑤))))
2322pm5.32i 668 . . . . . 6 (((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) E ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∨ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∧ 𝑧𝐿𝑤))) ↔ ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤)) ∨ (((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤)) ∧ 𝑧𝐿𝑤))))
2423opabbii 4679 . . . . 5 {⟨𝑧, 𝑤⟩ ∣ ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) E ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∨ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∧ 𝑧𝐿𝑤)))} = {⟨𝑧, 𝑤⟩ ∣ ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((1st𝑧) ∪ (2nd𝑧)) ∈ ((1st𝑤) ∪ (2nd𝑤)) ∨ (((1st𝑧) ∪ (2nd𝑧)) = ((1st𝑤) ∪ (2nd𝑤)) ∧ 𝑧𝐿𝑤)))}
251, 24eqtr4i 2646 . . . 4 𝑅 = {⟨𝑧, 𝑤⟩ ∣ ((𝑧 ∈ (On × On) ∧ 𝑤 ∈ (On × On)) ∧ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) E ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∨ (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑧) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))‘𝑤) ∧ 𝑧𝐿𝑤)))}
26 xp1st 7143 . . . . . . . 8 (𝑥 ∈ (On × On) → (1st𝑥) ∈ On)
27 xp2nd 7144 . . . . . . . 8 (𝑥 ∈ (On × On) → (2nd𝑥) ∈ On)
28 fvex 6158 . . . . . . . . . 10 (1st𝑥) ∈ V
2928elon 5691 . . . . . . . . 9 ((1st𝑥) ∈ On ↔ Ord (1st𝑥))
30 fvex 6158 . . . . . . . . . 10 (2nd𝑥) ∈ V
3130elon 5691 . . . . . . . . 9 ((2nd𝑥) ∈ On ↔ Ord (2nd𝑥))
32 ordun 5788 . . . . . . . . 9 ((Ord (1st𝑥) ∧ Ord (2nd𝑥)) → Ord ((1st𝑥) ∪ (2nd𝑥)))
3329, 31, 32syl2anb 496 . . . . . . . 8 (((1st𝑥) ∈ On ∧ (2nd𝑥) ∈ On) → Ord ((1st𝑥) ∪ (2nd𝑥)))
3426, 27, 33syl2anc 692 . . . . . . 7 (𝑥 ∈ (On × On) → Ord ((1st𝑥) ∪ (2nd𝑥)))
3528, 30unex 6909 . . . . . . . 8 ((1st𝑥) ∪ (2nd𝑥)) ∈ V
3635elon 5691 . . . . . . 7 (((1st𝑥) ∪ (2nd𝑥)) ∈ On ↔ Ord ((1st𝑥) ∪ (2nd𝑥)))
3734, 36sylibr 224 . . . . . 6 (𝑥 ∈ (On × On) → ((1st𝑥) ∪ (2nd𝑥)) ∈ On)
385, 37fmpti 6339 . . . . 5 (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))):(On × On)⟶On
3938a1i 11 . . . 4 (⊤ → (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))):(On × On)⟶On)
40 epweon 6930 . . . . 5 E We On
4140a1i 11 . . . 4 (⊤ → E We On)
42 leweon.1 . . . . . 6 𝐿 = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (On × On) ∧ 𝑦 ∈ (On × On)) ∧ ((1st𝑥) ∈ (1st𝑦) ∨ ((1st𝑥) = (1st𝑦) ∧ (2nd𝑥) ∈ (2nd𝑦))))}
4342leweon 8778 . . . . 5 𝐿 We (On × On)
4443a1i 11 . . . 4 (⊤ → 𝐿 We (On × On))
45 vex 3189 . . . . . . . 8 𝑢 ∈ V
4645dmex 7046 . . . . . . 7 dom 𝑢 ∈ V
4745rnex 7047 . . . . . . 7 ran 𝑢 ∈ V
4846, 47unex 6909 . . . . . 6 (dom 𝑢 ∪ ran 𝑢) ∈ V
49 imadmres 5586 . . . . . . 7 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢)) = ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢)
50 inss2 3812 . . . . . . . . . 10 (𝑢 ∩ (On × On)) ⊆ (On × On)
51 ssun1 3754 . . . . . . . . . . . . . 14 dom 𝑢 ⊆ (dom 𝑢 ∪ ran 𝑢)
5250sseli 3579 . . . . . . . . . . . . . . . . 17 (𝑥 ∈ (𝑢 ∩ (On × On)) → 𝑥 ∈ (On × On))
53 1st2nd2 7150 . . . . . . . . . . . . . . . . 17 (𝑥 ∈ (On × On) → 𝑥 = ⟨(1st𝑥), (2nd𝑥)⟩)
5452, 53syl 17 . . . . . . . . . . . . . . . 16 (𝑥 ∈ (𝑢 ∩ (On × On)) → 𝑥 = ⟨(1st𝑥), (2nd𝑥)⟩)
55 inss1 3811 . . . . . . . . . . . . . . . . 17 (𝑢 ∩ (On × On)) ⊆ 𝑢
5655sseli 3579 . . . . . . . . . . . . . . . 16 (𝑥 ∈ (𝑢 ∩ (On × On)) → 𝑥𝑢)
5754, 56eqeltrrd 2699 . . . . . . . . . . . . . . 15 (𝑥 ∈ (𝑢 ∩ (On × On)) → ⟨(1st𝑥), (2nd𝑥)⟩ ∈ 𝑢)
5828, 30opeldm 5288 . . . . . . . . . . . . . . 15 (⟨(1st𝑥), (2nd𝑥)⟩ ∈ 𝑢 → (1st𝑥) ∈ dom 𝑢)
5957, 58syl 17 . . . . . . . . . . . . . 14 (𝑥 ∈ (𝑢 ∩ (On × On)) → (1st𝑥) ∈ dom 𝑢)
6051, 59sseldi 3581 . . . . . . . . . . . . 13 (𝑥 ∈ (𝑢 ∩ (On × On)) → (1st𝑥) ∈ (dom 𝑢 ∪ ran 𝑢))
61 ssun2 3755 . . . . . . . . . . . . . 14 ran 𝑢 ⊆ (dom 𝑢 ∪ ran 𝑢)
6228, 30opelrn 5317 . . . . . . . . . . . . . . 15 (⟨(1st𝑥), (2nd𝑥)⟩ ∈ 𝑢 → (2nd𝑥) ∈ ran 𝑢)
6357, 62syl 17 . . . . . . . . . . . . . 14 (𝑥 ∈ (𝑢 ∩ (On × On)) → (2nd𝑥) ∈ ran 𝑢)
6461, 63sseldi 3581 . . . . . . . . . . . . 13 (𝑥 ∈ (𝑢 ∩ (On × On)) → (2nd𝑥) ∈ (dom 𝑢 ∪ ran 𝑢))
65 prssi 4321 . . . . . . . . . . . . 13 (((1st𝑥) ∈ (dom 𝑢 ∪ ran 𝑢) ∧ (2nd𝑥) ∈ (dom 𝑢 ∪ ran 𝑢)) → {(1st𝑥), (2nd𝑥)} ⊆ (dom 𝑢 ∪ ran 𝑢))
6660, 64, 65syl2anc 692 . . . . . . . . . . . 12 (𝑥 ∈ (𝑢 ∩ (On × On)) → {(1st𝑥), (2nd𝑥)} ⊆ (dom 𝑢 ∪ ran 𝑢))
6752, 26syl 17 . . . . . . . . . . . . 13 (𝑥 ∈ (𝑢 ∩ (On × On)) → (1st𝑥) ∈ On)
6852, 27syl 17 . . . . . . . . . . . . 13 (𝑥 ∈ (𝑢 ∩ (On × On)) → (2nd𝑥) ∈ On)
69 ordunpr 6973 . . . . . . . . . . . . 13 (((1st𝑥) ∈ On ∧ (2nd𝑥) ∈ On) → ((1st𝑥) ∪ (2nd𝑥)) ∈ {(1st𝑥), (2nd𝑥)})
7067, 68, 69syl2anc 692 . . . . . . . . . . . 12 (𝑥 ∈ (𝑢 ∩ (On × On)) → ((1st𝑥) ∪ (2nd𝑥)) ∈ {(1st𝑥), (2nd𝑥)})
7166, 70sseldd 3584 . . . . . . . . . . 11 (𝑥 ∈ (𝑢 ∩ (On × On)) → ((1st𝑥) ∪ (2nd𝑥)) ∈ (dom 𝑢 ∪ ran 𝑢))
7271rgen 2917 . . . . . . . . . 10 𝑥 ∈ (𝑢 ∩ (On × On))((1st𝑥) ∪ (2nd𝑥)) ∈ (dom 𝑢 ∪ ran 𝑢)
73 ssrab 3659 . . . . . . . . . 10 ((𝑢 ∩ (On × On)) ⊆ {𝑥 ∈ (On × On) ∣ ((1st𝑥) ∪ (2nd𝑥)) ∈ (dom 𝑢 ∪ ran 𝑢)} ↔ ((𝑢 ∩ (On × On)) ⊆ (On × On) ∧ ∀𝑥 ∈ (𝑢 ∩ (On × On))((1st𝑥) ∪ (2nd𝑥)) ∈ (dom 𝑢 ∪ ran 𝑢)))
7450, 72, 73mpbir2an 954 . . . . . . . . 9 (𝑢 ∩ (On × On)) ⊆ {𝑥 ∈ (On × On) ∣ ((1st𝑥) ∪ (2nd𝑥)) ∈ (dom 𝑢 ∪ ran 𝑢)}
75 dmres 5378 . . . . . . . . . 10 dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) = (𝑢 ∩ dom (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))))
7638fdmi 6009 . . . . . . . . . . 11 dom (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) = (On × On)
7776ineq2i 3789 . . . . . . . . . 10 (𝑢 ∩ dom (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))) = (𝑢 ∩ (On × On))
7875, 77eqtri 2643 . . . . . . . . 9 dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) = (𝑢 ∩ (On × On))
795mptpreima 5587 . . . . . . . . 9 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ (dom 𝑢 ∪ ran 𝑢)) = {𝑥 ∈ (On × On) ∣ ((1st𝑥) ∪ (2nd𝑥)) ∈ (dom 𝑢 ∪ ran 𝑢)}
8074, 78, 793sstr4i 3623 . . . . . . . 8 dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ (dom 𝑢 ∪ ran 𝑢))
81 funmpt 5884 . . . . . . . . 9 Fun (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))
82 resss 5381 . . . . . . . . . 10 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))
83 dmss 5283 . . . . . . . . . 10 (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) → dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ dom (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))))
8482, 83ax-mp 5 . . . . . . . . 9 dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ dom (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))
85 funimass3 6289 . . . . . . . . 9 ((Fun (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ∧ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ dom (𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥)))) → (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢)) ⊆ (dom 𝑢 ∪ ran 𝑢) ↔ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ (dom 𝑢 ∪ ran 𝑢))))
8681, 84, 85mp2an 707 . . . . . . . 8 (((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢)) ⊆ (dom 𝑢 ∪ ran 𝑢) ↔ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢) ⊆ ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ (dom 𝑢 ∪ ran 𝑢)))
8780, 86mpbir 221 . . . . . . 7 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ dom ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) ↾ 𝑢)) ⊆ (dom 𝑢 ∪ ran 𝑢)
8849, 87eqsstr3i 3615 . . . . . 6 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) ⊆ (dom 𝑢 ∪ ran 𝑢)
8948, 88ssexi 4763 . . . . 5 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) ∈ V
9089a1i 11 . . . 4 (⊤ → ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) ∈ V)
9125, 39, 41, 44, 90fnwe 7238 . . 3 (⊤ → 𝑅 We (On × On))
92 epse 5057 . . . . 5 E Se On
9392a1i 11 . . . 4 (⊤ → E Se On)
94 vuniex 6907 . . . . . . . 8 𝑢 ∈ V
9594pwex 4808 . . . . . . 7 𝒫 𝑢 ∈ V
9695, 95xpex 6915 . . . . . 6 (𝒫 𝑢 × 𝒫 𝑢) ∈ V
975mptpreima 5587 . . . . . . . 8 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) = {𝑥 ∈ (On × On) ∣ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢}
98 df-rab 2916 . . . . . . . 8 {𝑥 ∈ (On × On) ∣ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢} = {𝑥 ∣ (𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢)}
9997, 98eqtri 2643 . . . . . . 7 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) = {𝑥 ∣ (𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢)}
10053adantr 481 . . . . . . . . 9 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → 𝑥 = ⟨(1st𝑥), (2nd𝑥)⟩)
101 elssuni 4433 . . . . . . . . . . . . 13 (((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢 → ((1st𝑥) ∪ (2nd𝑥)) ⊆ 𝑢)
102101adantl 482 . . . . . . . . . . . 12 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → ((1st𝑥) ∪ (2nd𝑥)) ⊆ 𝑢)
103102unssad 3768 . . . . . . . . . . 11 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → (1st𝑥) ⊆ 𝑢)
10428elpw 4136 . . . . . . . . . . 11 ((1st𝑥) ∈ 𝒫 𝑢 ↔ (1st𝑥) ⊆ 𝑢)
105103, 104sylibr 224 . . . . . . . . . 10 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → (1st𝑥) ∈ 𝒫 𝑢)
106102unssbd 3769 . . . . . . . . . . 11 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → (2nd𝑥) ⊆ 𝑢)
10730elpw 4136 . . . . . . . . . . 11 ((2nd𝑥) ∈ 𝒫 𝑢 ↔ (2nd𝑥) ⊆ 𝑢)
108106, 107sylibr 224 . . . . . . . . . 10 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → (2nd𝑥) ∈ 𝒫 𝑢)
109105, 108jca 554 . . . . . . . . 9 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → ((1st𝑥) ∈ 𝒫 𝑢 ∧ (2nd𝑥) ∈ 𝒫 𝑢))
110 elxp6 7145 . . . . . . . . 9 (𝑥 ∈ (𝒫 𝑢 × 𝒫 𝑢) ↔ (𝑥 = ⟨(1st𝑥), (2nd𝑥)⟩ ∧ ((1st𝑥) ∈ 𝒫 𝑢 ∧ (2nd𝑥) ∈ 𝒫 𝑢)))
111100, 109, 110sylanbrc 697 . . . . . . . 8 ((𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢) → 𝑥 ∈ (𝒫 𝑢 × 𝒫 𝑢))
112111abssi 3656 . . . . . . 7 {𝑥 ∣ (𝑥 ∈ (On × On) ∧ ((1st𝑥) ∪ (2nd𝑥)) ∈ 𝑢)} ⊆ (𝒫 𝑢 × 𝒫 𝑢)
11399, 112eqsstri 3614 . . . . . 6 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) ⊆ (𝒫 𝑢 × 𝒫 𝑢)
11496, 113ssexi 4763 . . . . 5 ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) ∈ V
115114a1i 11 . . . 4 (⊤ → ((𝑥 ∈ (On × On) ↦ ((1st𝑥) ∪ (2nd𝑥))) “ 𝑢) ∈ V)
11625, 39, 93, 115fnse 7239 . . 3 (⊤ → 𝑅 Se (On × On))
11791, 116jca 554 . 2 (⊤ → (𝑅 We (On × On) ∧ 𝑅 Se (On × On)))
118117trud 1490 1 (𝑅 We (On × On) ∧ 𝑅 Se (On × On))
Colors of variables: wff setvar class
Syntax hints:  wb 196  wo 383  wa 384   = wceq 1480  wtru 1481  wcel 1987  {cab 2607  wral 2907  {crab 2911  Vcvv 3186  cun 3553  cin 3554  wss 3555  𝒫 cpw 4130  {cpr 4150  cop 4154   cuni 4402   class class class wbr 4613  {copab 4672  cmpt 4673   E cep 4983   Se wse 5031   We wwe 5032   × cxp 5072  ccnv 5073  dom cdm 5074  ran crn 5075  cres 5076  cima 5077  Ord word 5681  Oncon0 5682  Fun wfun 5841  wf 5843  cfv 5847  1st c1st 7111  2nd c2nd 7112
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-rab 2916  df-v 3188  df-sbc 3418  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-se 5034  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-ord 5685  df-on 5686  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-isom 5856  df-1st 7113  df-2nd 7114
This theorem is referenced by:  infxpenlem  8780
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