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Theorem grur1 9842
Description: A characterization of Grothendieck universes, part 2. (Contributed by Mario Carneiro, 24-Jun-2013.)
Hypothesis
Ref Expression
gruina.1 𝐴 = (𝑈 ∩ On)
Assertion
Ref Expression
grur1 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → 𝑈 = (𝑅1𝐴))

Proof of Theorem grur1
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nss 3812 . . . . 5 𝑈 ⊆ (𝑅1𝐴) ↔ ∃𝑥(𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴)))
2 fveq2 6330 . . . . . . . . . . . 12 (𝑦 = 𝑥 → (rank‘𝑦) = (rank‘𝑥))
32eqeq1d 2773 . . . . . . . . . . 11 (𝑦 = 𝑥 → ((rank‘𝑦) = 𝐴 ↔ (rank‘𝑥) = 𝐴))
43rspcev 3460 . . . . . . . . . 10 ((𝑥𝑈 ∧ (rank‘𝑥) = 𝐴) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴)
54ex 397 . . . . . . . . 9 (𝑥𝑈 → ((rank‘𝑥) = 𝐴 → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
65ad2antrl 707 . . . . . . . 8 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → ((rank‘𝑥) = 𝐴 → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
7 simplr 752 . . . . . . . . . . . 12 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → 𝑈 (𝑅1 “ On))
8 simprl 754 . . . . . . . . . . . 12 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → 𝑥𝑈)
9 r1elssi 8830 . . . . . . . . . . . . 13 (𝑈 (𝑅1 “ On) → 𝑈 (𝑅1 “ On))
109sseld 3751 . . . . . . . . . . . 12 (𝑈 (𝑅1 “ On) → (𝑥𝑈𝑥 (𝑅1 “ On)))
117, 8, 10sylc 65 . . . . . . . . . . 11 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → 𝑥 (𝑅1 “ On))
12 tcrank 8909 . . . . . . . . . . 11 (𝑥 (𝑅1 “ On) → (rank‘𝑥) = (rank “ (TC‘𝑥)))
1311, 12syl 17 . . . . . . . . . 10 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → (rank‘𝑥) = (rank “ (TC‘𝑥)))
1413eleq2d 2836 . . . . . . . . 9 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → (𝐴 ∈ (rank‘𝑥) ↔ 𝐴 ∈ (rank “ (TC‘𝑥))))
15 gruelss 9816 . . . . . . . . . . . 12 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → 𝑥𝑈)
16 grutr 9815 . . . . . . . . . . . . 13 (𝑈 ∈ Univ → Tr 𝑈)
1716adantr 466 . . . . . . . . . . . 12 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → Tr 𝑈)
18 vex 3354 . . . . . . . . . . . . 13 𝑥 ∈ V
19 tcmin 8779 . . . . . . . . . . . . 13 (𝑥 ∈ V → ((𝑥𝑈 ∧ Tr 𝑈) → (TC‘𝑥) ⊆ 𝑈))
2018, 19ax-mp 5 . . . . . . . . . . . 12 ((𝑥𝑈 ∧ Tr 𝑈) → (TC‘𝑥) ⊆ 𝑈)
2115, 17, 20syl2anc 573 . . . . . . . . . . 11 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → (TC‘𝑥) ⊆ 𝑈)
22 rankf 8819 . . . . . . . . . . . . 13 rank: (𝑅1 “ On)⟶On
23 ffun 6186 . . . . . . . . . . . . 13 (rank: (𝑅1 “ On)⟶On → Fun rank)
2422, 23ax-mp 5 . . . . . . . . . . . 12 Fun rank
25 fvelima 6388 . . . . . . . . . . . 12 ((Fun rank ∧ 𝐴 ∈ (rank “ (TC‘𝑥))) → ∃𝑦 ∈ (TC‘𝑥)(rank‘𝑦) = 𝐴)
2624, 25mpan 670 . . . . . . . . . . 11 (𝐴 ∈ (rank “ (TC‘𝑥)) → ∃𝑦 ∈ (TC‘𝑥)(rank‘𝑦) = 𝐴)
27 ssrexv 3816 . . . . . . . . . . 11 ((TC‘𝑥) ⊆ 𝑈 → (∃𝑦 ∈ (TC‘𝑥)(rank‘𝑦) = 𝐴 → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
2821, 26, 27syl2im 40 . . . . . . . . . 10 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → (𝐴 ∈ (rank “ (TC‘𝑥)) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
2928ad2ant2r 741 . . . . . . . . 9 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → (𝐴 ∈ (rank “ (TC‘𝑥)) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
3014, 29sylbid 230 . . . . . . . 8 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → (𝐴 ∈ (rank‘𝑥) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
31 simprr 756 . . . . . . . . . 10 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → ¬ 𝑥 ∈ (𝑅1𝐴))
32 ne0i 4069 . . . . . . . . . . . . . . 15 (𝑥𝑈𝑈 ≠ ∅)
33 gruina.1 . . . . . . . . . . . . . . . 16 𝐴 = (𝑈 ∩ On)
3433gruina 9840 . . . . . . . . . . . . . . 15 ((𝑈 ∈ Univ ∧ 𝑈 ≠ ∅) → 𝐴 ∈ Inacc)
3532, 34sylan2 580 . . . . . . . . . . . . . 14 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → 𝐴 ∈ Inacc)
36 inawina 9712 . . . . . . . . . . . . . 14 (𝐴 ∈ Inacc → 𝐴 ∈ Inaccw)
37 winaon 9710 . . . . . . . . . . . . . 14 (𝐴 ∈ Inaccw𝐴 ∈ On)
3835, 36, 373syl 18 . . . . . . . . . . . . 13 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → 𝐴 ∈ On)
39 r1fnon 8792 . . . . . . . . . . . . . 14 𝑅1 Fn On
40 fndm 6128 . . . . . . . . . . . . . 14 (𝑅1 Fn On → dom 𝑅1 = On)
4139, 40ax-mp 5 . . . . . . . . . . . . 13 dom 𝑅1 = On
4238, 41syl6eleqr 2861 . . . . . . . . . . . 12 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → 𝐴 ∈ dom 𝑅1)
4342ad2ant2r 741 . . . . . . . . . . 11 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → 𝐴 ∈ dom 𝑅1)
44 rankr1ag 8827 . . . . . . . . . . 11 ((𝑥 (𝑅1 “ On) ∧ 𝐴 ∈ dom 𝑅1) → (𝑥 ∈ (𝑅1𝐴) ↔ (rank‘𝑥) ∈ 𝐴))
4511, 43, 44syl2anc 573 . . . . . . . . . 10 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → (𝑥 ∈ (𝑅1𝐴) ↔ (rank‘𝑥) ∈ 𝐴))
4631, 45mtbid 313 . . . . . . . . 9 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → ¬ (rank‘𝑥) ∈ 𝐴)
47 rankon 8820 . . . . . . . . . . . . 13 (rank‘𝑥) ∈ On
48 eloni 5874 . . . . . . . . . . . . . 14 ((rank‘𝑥) ∈ On → Ord (rank‘𝑥))
49 eloni 5874 . . . . . . . . . . . . . 14 (𝐴 ∈ On → Ord 𝐴)
50 ordtri3or 5896 . . . . . . . . . . . . . 14 ((Ord (rank‘𝑥) ∧ Ord 𝐴) → ((rank‘𝑥) ∈ 𝐴 ∨ (rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥)))
5148, 49, 50syl2an 583 . . . . . . . . . . . . 13 (((rank‘𝑥) ∈ On ∧ 𝐴 ∈ On) → ((rank‘𝑥) ∈ 𝐴 ∨ (rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥)))
5247, 38, 51sylancr 575 . . . . . . . . . . . 12 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → ((rank‘𝑥) ∈ 𝐴 ∨ (rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥)))
53 3orass 1074 . . . . . . . . . . . 12 (((rank‘𝑥) ∈ 𝐴 ∨ (rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥)) ↔ ((rank‘𝑥) ∈ 𝐴 ∨ ((rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥))))
5452, 53sylib 208 . . . . . . . . . . 11 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → ((rank‘𝑥) ∈ 𝐴 ∨ ((rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥))))
5554ord 853 . . . . . . . . . 10 ((𝑈 ∈ Univ ∧ 𝑥𝑈) → (¬ (rank‘𝑥) ∈ 𝐴 → ((rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥))))
5655ad2ant2r 741 . . . . . . . . 9 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → (¬ (rank‘𝑥) ∈ 𝐴 → ((rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥))))
5746, 56mpd 15 . . . . . . . 8 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → ((rank‘𝑥) = 𝐴𝐴 ∈ (rank‘𝑥)))
586, 30, 57mpjaod 849 . . . . . . 7 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴))) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴)
5958ex 397 . . . . . 6 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → ((𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴)) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
6059exlimdv 2013 . . . . 5 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → (∃𝑥(𝑥𝑈 ∧ ¬ 𝑥 ∈ (𝑅1𝐴)) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
611, 60syl5bi 232 . . . 4 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → (¬ 𝑈 ⊆ (𝑅1𝐴) → ∃𝑦𝑈 (rank‘𝑦) = 𝐴))
62 simpll 750 . . . . . . 7 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝑈 ∈ Univ)
63 ne0i 4069 . . . . . . . . . 10 (𝑦𝑈𝑈 ≠ ∅)
6463, 34sylan2 580 . . . . . . . . 9 ((𝑈 ∈ Univ ∧ 𝑦𝑈) → 𝐴 ∈ Inacc)
6564ad2ant2r 741 . . . . . . . 8 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝐴 ∈ Inacc)
6665, 36, 373syl 18 . . . . . . 7 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝐴 ∈ On)
67 simprl 754 . . . . . . 7 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝑦𝑈)
68 fveq2 6330 . . . . . . . . . 10 ((rank‘𝑦) = 𝐴 → (cf‘(rank‘𝑦)) = (cf‘𝐴))
6968ad2antll 708 . . . . . . . . 9 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → (cf‘(rank‘𝑦)) = (cf‘𝐴))
70 elina 9709 . . . . . . . . . . 11 (𝐴 ∈ Inacc ↔ (𝐴 ≠ ∅ ∧ (cf‘𝐴) = 𝐴 ∧ ∀𝑥𝐴 𝒫 𝑥𝐴))
7170simp2bi 1140 . . . . . . . . . 10 (𝐴 ∈ Inacc → (cf‘𝐴) = 𝐴)
7265, 71syl 17 . . . . . . . . 9 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → (cf‘𝐴) = 𝐴)
7369, 72eqtrd 2805 . . . . . . . 8 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → (cf‘(rank‘𝑦)) = 𝐴)
74 rankcf 9799 . . . . . . . . 9 ¬ 𝑦 ≺ (cf‘(rank‘𝑦))
75 fvex 6340 . . . . . . . . . 10 (cf‘(rank‘𝑦)) ∈ V
76 vex 3354 . . . . . . . . . 10 𝑦 ∈ V
77 domtri 9578 . . . . . . . . . 10 (((cf‘(rank‘𝑦)) ∈ V ∧ 𝑦 ∈ V) → ((cf‘(rank‘𝑦)) ≼ 𝑦 ↔ ¬ 𝑦 ≺ (cf‘(rank‘𝑦))))
7875, 76, 77mp2an 672 . . . . . . . . 9 ((cf‘(rank‘𝑦)) ≼ 𝑦 ↔ ¬ 𝑦 ≺ (cf‘(rank‘𝑦)))
7974, 78mpbir 221 . . . . . . . 8 (cf‘(rank‘𝑦)) ≼ 𝑦
8073, 79syl6eqbrr 4826 . . . . . . 7 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝐴𝑦)
81 grudomon 9839 . . . . . . 7 ((𝑈 ∈ Univ ∧ 𝐴 ∈ On ∧ (𝑦𝑈𝐴𝑦)) → 𝐴𝑈)
8262, 66, 67, 80, 81syl112anc 1480 . . . . . 6 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝐴𝑈)
83 elin 3947 . . . . . . . . 9 (𝐴 ∈ (𝑈 ∩ On) ↔ (𝐴𝑈𝐴 ∈ On))
8483biimpri 218 . . . . . . . 8 ((𝐴𝑈𝐴 ∈ On) → 𝐴 ∈ (𝑈 ∩ On))
8584, 33syl6eleqr 2861 . . . . . . 7 ((𝐴𝑈𝐴 ∈ On) → 𝐴𝐴)
86 ordirr 5882 . . . . . . . . 9 (Ord 𝐴 → ¬ 𝐴𝐴)
8749, 86syl 17 . . . . . . . 8 (𝐴 ∈ On → ¬ 𝐴𝐴)
8887adantl 467 . . . . . . 7 ((𝐴𝑈𝐴 ∈ On) → ¬ 𝐴𝐴)
8985, 88pm2.21dd 186 . . . . . 6 ((𝐴𝑈𝐴 ∈ On) → 𝑈 ⊆ (𝑅1𝐴))
9082, 66, 89syl2anc 573 . . . . 5 (((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) ∧ (𝑦𝑈 ∧ (rank‘𝑦) = 𝐴)) → 𝑈 ⊆ (𝑅1𝐴))
9190rexlimdvaa 3180 . . . 4 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → (∃𝑦𝑈 (rank‘𝑦) = 𝐴𝑈 ⊆ (𝑅1𝐴)))
9261, 91syld 47 . . 3 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → (¬ 𝑈 ⊆ (𝑅1𝐴) → 𝑈 ⊆ (𝑅1𝐴)))
9392pm2.18d 125 . 2 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → 𝑈 ⊆ (𝑅1𝐴))
9433grur1a 9841 . . 3 (𝑈 ∈ Univ → (𝑅1𝐴) ⊆ 𝑈)
9594adantr 466 . 2 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → (𝑅1𝐴) ⊆ 𝑈)
9693, 95eqssd 3769 1 ((𝑈 ∈ Univ ∧ 𝑈 (𝑅1 “ On)) → 𝑈 = (𝑅1𝐴))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 382  wo 836  w3o 1070   = wceq 1631  wex 1852  wcel 2145  wne 2943  wral 3061  wrex 3062  Vcvv 3351  cin 3722  wss 3723  c0 4063  𝒫 cpw 4297   cuni 4574   class class class wbr 4786  Tr wtr 4886  dom cdm 5249  cima 5252  Ord word 5863  Oncon0 5864  Fun wfun 6023   Fn wfn 6024  wf 6025  cfv 6029  cdom 8105  csdm 8106  TCctc 8774  𝑅1cr1 8787  rankcrnk 8788  cfccf 8961  Inaccwcwina 9704  Inacccina 9705  Univcgru 9812
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-8 2147  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-rep 4904  ax-sep 4915  ax-nul 4923  ax-pow 4974  ax-pr 5034  ax-un 7094  ax-inf2 8700  ax-ac2 9485
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-3or 1072  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ne 2944  df-ral 3066  df-rex 3067  df-reu 3068  df-rmo 3069  df-rab 3070  df-v 3353  df-sbc 3588  df-csb 3683  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-pss 3739  df-nul 4064  df-if 4226  df-pw 4299  df-sn 4317  df-pr 4319  df-tp 4321  df-op 4323  df-uni 4575  df-int 4612  df-iun 4656  df-iin 4657  df-br 4787  df-opab 4847  df-mpt 4864  df-tr 4887  df-id 5157  df-eprel 5162  df-po 5170  df-so 5171  df-fr 5208  df-se 5209  df-we 5210  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-pred 5821  df-ord 5867  df-on 5868  df-lim 5869  df-suc 5870  df-iota 5992  df-fun 6031  df-fn 6032  df-f 6033  df-f1 6034  df-fo 6035  df-f1o 6036  df-fv 6037  df-isom 6038  df-riota 6752  df-ov 6794  df-oprab 6795  df-mpt2 6796  df-om 7211  df-1st 7313  df-2nd 7314  df-wrecs 7557  df-recs 7619  df-rdg 7657  df-1o 7711  df-er 7894  df-map 8009  df-en 8108  df-dom 8109  df-sdom 8110  df-fin 8111  df-tc 8775  df-r1 8789  df-rank 8790  df-card 8963  df-cf 8965  df-acn 8966  df-ac 9137  df-wina 9706  df-ina 9707  df-gru 9813
This theorem is referenced by:  grutsk  9844  bj-grur1  33347
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