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Theorem cofsmo 10025
Description: Any cofinal map implies the existence of a strictly monotone cofinal map with a domain no larger than the original. Proposition 11.7 of [TakeutiZaring] p. 101. (Contributed by Mario Carneiro, 20-Mar-2013.)
Hypotheses
Ref Expression
cofsmo.1 𝐶 = {𝑦𝐵 ∣ ∀𝑤𝑦 (𝑓𝑤) ∈ (𝑓𝑦)}
cofsmo.2 𝐾 = {𝑥𝐵𝑧 ⊆ (𝑓𝑥)}
cofsmo.3 𝑂 = OrdIso( E , 𝐶)
Assertion
Ref Expression
cofsmo ((Ord 𝐴𝐵 ∈ On) → (∃𝑓(𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → ∃𝑥 ∈ suc 𝐵𝑔(𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣))))
Distinct variable groups:   𝑓,𝑔,𝑣,𝑤,𝑥,𝑧,𝐴   𝑦,𝑓,𝐵,𝑣,𝑤,𝑥,𝑧   𝑣,𝐶   𝑣,𝐾,𝑤,𝑦   𝑔,𝑂,𝑣,𝑥,𝑧
Allowed substitution hints:   𝐴(𝑦)   𝐵(𝑔)   𝐶(𝑥,𝑦,𝑧,𝑤,𝑓,𝑔)   𝐾(𝑥,𝑧,𝑓,𝑔)   𝑂(𝑦,𝑤,𝑓)

Proof of Theorem cofsmo
Dummy variables 𝑠 𝑡 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cofsmo.1 . . . . . . . . . . . . 13 𝐶 = {𝑦𝐵 ∣ ∀𝑤𝑦 (𝑓𝑤) ∈ (𝑓𝑦)}
21ssrab3 4015 . . . . . . . . . . . 12 𝐶𝐵
3 ssexg 5247 . . . . . . . . . . . 12 ((𝐶𝐵𝐵 ∈ On) → 𝐶 ∈ V)
42, 3mpan 687 . . . . . . . . . . 11 (𝐵 ∈ On → 𝐶 ∈ V)
5 onss 7634 . . . . . . . . . . . . 13 (𝐵 ∈ On → 𝐵 ⊆ On)
62, 5sstrid 3932 . . . . . . . . . . . 12 (𝐵 ∈ On → 𝐶 ⊆ On)
7 epweon 7625 . . . . . . . . . . . 12 E We On
8 wess 5576 . . . . . . . . . . . 12 (𝐶 ⊆ On → ( E We On → E We 𝐶))
96, 7, 8mpisyl 21 . . . . . . . . . . 11 (𝐵 ∈ On → E We 𝐶)
10 cofsmo.3 . . . . . . . . . . . 12 𝑂 = OrdIso( E , 𝐶)
1110oiiso 9296 . . . . . . . . . . 11 ((𝐶 ∈ V ∧ E We 𝐶) → 𝑂 Isom E , E (dom 𝑂, 𝐶))
124, 9, 11syl2anc 584 . . . . . . . . . 10 (𝐵 ∈ On → 𝑂 Isom E , E (dom 𝑂, 𝐶))
1312ad2antlr 724 . . . . . . . . 9 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝑂 Isom E , E (dom 𝑂, 𝐶))
14 isof1o 7194 . . . . . . . . 9 (𝑂 Isom E , E (dom 𝑂, 𝐶) → 𝑂:dom 𝑂1-1-onto𝐶)
15 f1ofo 6723 . . . . . . . . 9 (𝑂:dom 𝑂1-1-onto𝐶𝑂:dom 𝑂onto𝐶)
1613, 14, 153syl 18 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝑂:dom 𝑂onto𝐶)
17 fof 6688 . . . . . . . . 9 (𝑂:dom 𝑂onto𝐶𝑂:dom 𝑂𝐶)
18 fss 6617 . . . . . . . . 9 ((𝑂:dom 𝑂𝐶𝐶𝐵) → 𝑂:dom 𝑂𝐵)
1917, 2, 18sylancl 586 . . . . . . . 8 (𝑂:dom 𝑂onto𝐶𝑂:dom 𝑂𝐵)
2016, 19syl 17 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝑂:dom 𝑂𝐵)
2110oion 9295 . . . . . . . . . 10 (𝐶 ∈ V → dom 𝑂 ∈ On)
224, 21syl 17 . . . . . . . . 9 (𝐵 ∈ On → dom 𝑂 ∈ On)
2322ad2antlr 724 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → dom 𝑂 ∈ On)
24 simplr 766 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝐵 ∈ On)
25 eloni 6276 . . . . . . . . . . 11 (dom 𝑂 ∈ On → Ord dom 𝑂)
26 smoiso2 8200 . . . . . . . . . . 11 ((Ord dom 𝑂𝐶 ⊆ On) → ((𝑂:dom 𝑂onto𝐶 ∧ Smo 𝑂) ↔ 𝑂 Isom E , E (dom 𝑂, 𝐶)))
2725, 6, 26syl2an 596 . . . . . . . . . 10 ((dom 𝑂 ∈ On ∧ 𝐵 ∈ On) → ((𝑂:dom 𝑂onto𝐶 ∧ Smo 𝑂) ↔ 𝑂 Isom E , E (dom 𝑂, 𝐶)))
2827biimpar 478 . . . . . . . . 9 (((dom 𝑂 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑂 Isom E , E (dom 𝑂, 𝐶)) → (𝑂:dom 𝑂onto𝐶 ∧ Smo 𝑂))
2928simprd 496 . . . . . . . 8 (((dom 𝑂 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑂 Isom E , E (dom 𝑂, 𝐶)) → Smo 𝑂)
3023, 24, 13, 29syl21anc 835 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → Smo 𝑂)
31 eloni 6276 . . . . . . . 8 (𝐵 ∈ On → Ord 𝐵)
3231ad2antlr 724 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → Ord 𝐵)
33 smorndom 8199 . . . . . . 7 ((𝑂:dom 𝑂𝐵 ∧ Smo 𝑂 ∧ Ord 𝐵) → dom 𝑂𝐵)
3420, 30, 32, 33syl3anc 1370 . . . . . 6 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → dom 𝑂𝐵)
35 onsssuc 6353 . . . . . . 7 ((dom 𝑂 ∈ On ∧ 𝐵 ∈ On) → (dom 𝑂𝐵 ↔ dom 𝑂 ∈ suc 𝐵))
3623, 24, 35syl2anc 584 . . . . . 6 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → (dom 𝑂𝐵 ↔ dom 𝑂 ∈ suc 𝐵))
3734, 36mpbid 231 . . . . 5 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → dom 𝑂 ∈ suc 𝐵)
3837adantrr 714 . . . 4 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → dom 𝑂 ∈ suc 𝐵)
39 vex 3436 . . . . . 6 𝑓 ∈ V
4010oiexg 9294 . . . . . . . 8 (𝐶 ∈ V → 𝑂 ∈ V)
414, 40syl 17 . . . . . . 7 (𝐵 ∈ On → 𝑂 ∈ V)
4241ad2antlr 724 . . . . . 6 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → 𝑂 ∈ V)
43 coexg 7776 . . . . . 6 ((𝑓 ∈ V ∧ 𝑂 ∈ V) → (𝑓𝑂) ∈ V)
4439, 42, 43sylancr 587 . . . . 5 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → (𝑓𝑂) ∈ V)
45 simprl 768 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → 𝑓:𝐵𝐴)
4620adantrr 714 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → 𝑂:dom 𝑂𝐵)
4745, 46fcod 6626 . . . . . 6 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → (𝑓𝑂):dom 𝑂𝐴)
48 simpr 485 . . . . . . . . 9 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝑓:𝐵𝐴)
4948, 20fcod 6626 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → (𝑓𝑂):dom 𝑂𝐴)
50 ordsson 7633 . . . . . . . . 9 (Ord 𝐴𝐴 ⊆ On)
5150ad2antrr 723 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝐴 ⊆ On)
5223, 25syl 17 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → Ord dom 𝑂)
5316, 17syl 17 . . . . . . . . . . . 12 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝑂:dom 𝑂𝐶)
54 simpl 483 . . . . . . . . . . . 12 ((𝑠 ∈ dom 𝑂𝑡𝑠) → 𝑠 ∈ dom 𝑂)
55 ffvelrn 6959 . . . . . . . . . . . 12 ((𝑂:dom 𝑂𝐶𝑠 ∈ dom 𝑂) → (𝑂𝑠) ∈ 𝐶)
5653, 54, 55syl2an 596 . . . . . . . . . . 11 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → (𝑂𝑠) ∈ 𝐶)
57 ffn 6600 . . . . . . . . . . . . . 14 (𝑂:dom 𝑂𝐶𝑂 Fn dom 𝑂)
5816, 17, 573syl 18 . . . . . . . . . . . . 13 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → 𝑂 Fn dom 𝑂)
5958, 30jca 512 . . . . . . . . . . . 12 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → (𝑂 Fn dom 𝑂 ∧ Smo 𝑂))
60 smoel2 8194 . . . . . . . . . . . 12 (((𝑂 Fn dom 𝑂 ∧ Smo 𝑂) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → (𝑂𝑡) ∈ (𝑂𝑠))
6159, 60sylan 580 . . . . . . . . . . 11 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → (𝑂𝑡) ∈ (𝑂𝑠))
62 fveq2 6774 . . . . . . . . . . . . . . . 16 (𝑧 = (𝑂𝑠) → (𝑓𝑧) = (𝑓‘(𝑂𝑠)))
6362eleq2d 2824 . . . . . . . . . . . . . . 15 (𝑧 = (𝑂𝑠) → ((𝑓𝑥) ∈ (𝑓𝑧) ↔ (𝑓𝑥) ∈ (𝑓‘(𝑂𝑠))))
6463raleqbi1dv 3340 . . . . . . . . . . . . . 14 (𝑧 = (𝑂𝑠) → (∀𝑥𝑧 (𝑓𝑥) ∈ (𝑓𝑧) ↔ ∀𝑥 ∈ (𝑂𝑠)(𝑓𝑥) ∈ (𝑓‘(𝑂𝑠))))
65 fveq2 6774 . . . . . . . . . . . . . . . . . . 19 (𝑤 = 𝑥 → (𝑓𝑤) = (𝑓𝑥))
6665eleq1d 2823 . . . . . . . . . . . . . . . . . 18 (𝑤 = 𝑥 → ((𝑓𝑤) ∈ (𝑓𝑦) ↔ (𝑓𝑥) ∈ (𝑓𝑦)))
6766cbvralvw 3383 . . . . . . . . . . . . . . . . 17 (∀𝑤𝑦 (𝑓𝑤) ∈ (𝑓𝑦) ↔ ∀𝑥𝑦 (𝑓𝑥) ∈ (𝑓𝑦))
68 fveq2 6774 . . . . . . . . . . . . . . . . . . 19 (𝑦 = 𝑧 → (𝑓𝑦) = (𝑓𝑧))
6968eleq2d 2824 . . . . . . . . . . . . . . . . . 18 (𝑦 = 𝑧 → ((𝑓𝑥) ∈ (𝑓𝑦) ↔ (𝑓𝑥) ∈ (𝑓𝑧)))
7069raleqbi1dv 3340 . . . . . . . . . . . . . . . . 17 (𝑦 = 𝑧 → (∀𝑥𝑦 (𝑓𝑥) ∈ (𝑓𝑦) ↔ ∀𝑥𝑧 (𝑓𝑥) ∈ (𝑓𝑧)))
7167, 70bitrid 282 . . . . . . . . . . . . . . . 16 (𝑦 = 𝑧 → (∀𝑤𝑦 (𝑓𝑤) ∈ (𝑓𝑦) ↔ ∀𝑥𝑧 (𝑓𝑥) ∈ (𝑓𝑧)))
7271cbvrabv 3426 . . . . . . . . . . . . . . 15 {𝑦𝐵 ∣ ∀𝑤𝑦 (𝑓𝑤) ∈ (𝑓𝑦)} = {𝑧𝐵 ∣ ∀𝑥𝑧 (𝑓𝑥) ∈ (𝑓𝑧)}
731, 72eqtri 2766 . . . . . . . . . . . . . 14 𝐶 = {𝑧𝐵 ∣ ∀𝑥𝑧 (𝑓𝑥) ∈ (𝑓𝑧)}
7464, 73elrab2 3627 . . . . . . . . . . . . 13 ((𝑂𝑠) ∈ 𝐶 ↔ ((𝑂𝑠) ∈ 𝐵 ∧ ∀𝑥 ∈ (𝑂𝑠)(𝑓𝑥) ∈ (𝑓‘(𝑂𝑠))))
7574simprbi 497 . . . . . . . . . . . 12 ((𝑂𝑠) ∈ 𝐶 → ∀𝑥 ∈ (𝑂𝑠)(𝑓𝑥) ∈ (𝑓‘(𝑂𝑠)))
76 fveq2 6774 . . . . . . . . . . . . . 14 (𝑥 = (𝑂𝑡) → (𝑓𝑥) = (𝑓‘(𝑂𝑡)))
7776eleq1d 2823 . . . . . . . . . . . . 13 (𝑥 = (𝑂𝑡) → ((𝑓𝑥) ∈ (𝑓‘(𝑂𝑠)) ↔ (𝑓‘(𝑂𝑡)) ∈ (𝑓‘(𝑂𝑠))))
7877rspccv 3558 . . . . . . . . . . . 12 (∀𝑥 ∈ (𝑂𝑠)(𝑓𝑥) ∈ (𝑓‘(𝑂𝑠)) → ((𝑂𝑡) ∈ (𝑂𝑠) → (𝑓‘(𝑂𝑡)) ∈ (𝑓‘(𝑂𝑠))))
7975, 78syl 17 . . . . . . . . . . 11 ((𝑂𝑠) ∈ 𝐶 → ((𝑂𝑡) ∈ (𝑂𝑠) → (𝑓‘(𝑂𝑡)) ∈ (𝑓‘(𝑂𝑠))))
8056, 61, 79sylc 65 . . . . . . . . . 10 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → (𝑓‘(𝑂𝑡)) ∈ (𝑓‘(𝑂𝑠)))
81 ordtr1 6309 . . . . . . . . . . . . . 14 (Ord dom 𝑂 → ((𝑡𝑠𝑠 ∈ dom 𝑂) → 𝑡 ∈ dom 𝑂))
8281ancomsd 466 . . . . . . . . . . . . 13 (Ord dom 𝑂 → ((𝑠 ∈ dom 𝑂𝑡𝑠) → 𝑡 ∈ dom 𝑂))
8323, 25, 823syl 18 . . . . . . . . . . . 12 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → ((𝑠 ∈ dom 𝑂𝑡𝑠) → 𝑡 ∈ dom 𝑂))
8483imp 407 . . . . . . . . . . 11 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → 𝑡 ∈ dom 𝑂)
85 fvco3 6867 . . . . . . . . . . 11 ((𝑂:dom 𝑂𝐵𝑡 ∈ dom 𝑂) → ((𝑓𝑂)‘𝑡) = (𝑓‘(𝑂𝑡)))
8620, 84, 85syl2an2r 682 . . . . . . . . . 10 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → ((𝑓𝑂)‘𝑡) = (𝑓‘(𝑂𝑡)))
87 simprl 768 . . . . . . . . . . 11 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → 𝑠 ∈ dom 𝑂)
88 fvco3 6867 . . . . . . . . . . 11 ((𝑂:dom 𝑂𝐵𝑠 ∈ dom 𝑂) → ((𝑓𝑂)‘𝑠) = (𝑓‘(𝑂𝑠)))
8920, 87, 88syl2an2r 682 . . . . . . . . . 10 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → ((𝑓𝑂)‘𝑠) = (𝑓‘(𝑂𝑠)))
9080, 86, 893eltr4d 2854 . . . . . . . . 9 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ (𝑠 ∈ dom 𝑂𝑡𝑠)) → ((𝑓𝑂)‘𝑡) ∈ ((𝑓𝑂)‘𝑠))
9190ralrimivva 3123 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → ∀𝑠 ∈ dom 𝑂𝑡𝑠 ((𝑓𝑂)‘𝑡) ∈ ((𝑓𝑂)‘𝑠))
92 issmo2 8180 . . . . . . . . 9 ((𝑓𝑂):dom 𝑂𝐴 → ((𝐴 ⊆ On ∧ Ord dom 𝑂 ∧ ∀𝑠 ∈ dom 𝑂𝑡𝑠 ((𝑓𝑂)‘𝑡) ∈ ((𝑓𝑂)‘𝑠)) → Smo (𝑓𝑂)))
9392imp 407 . . . . . . . 8 (((𝑓𝑂):dom 𝑂𝐴 ∧ (𝐴 ⊆ On ∧ Ord dom 𝑂 ∧ ∀𝑠 ∈ dom 𝑂𝑡𝑠 ((𝑓𝑂)‘𝑡) ∈ ((𝑓𝑂)‘𝑠))) → Smo (𝑓𝑂))
9449, 51, 52, 91, 93syl13anc 1371 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → Smo (𝑓𝑂))
9594adantrr 714 . . . . . 6 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → Smo (𝑓𝑂))
96 rabn0 4319 . . . . . . . . . . . . . . . . . 18 ({𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ≠ ∅ ↔ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤))
97 ssrab2 4013 . . . . . . . . . . . . . . . . . . . 20 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ⊆ 𝐵
9897, 5sstrid 3932 . . . . . . . . . . . . . . . . . . 19 (𝐵 ∈ On → {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ⊆ On)
99 cofsmo.2 . . . . . . . . . . . . . . . . . . . . 21 𝐾 = {𝑥𝐵𝑧 ⊆ (𝑓𝑥)}
100 fveq2 6774 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑥 = 𝑤 → (𝑓𝑥) = (𝑓𝑤))
101100sseq2d 3953 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑥 = 𝑤 → (𝑧 ⊆ (𝑓𝑥) ↔ 𝑧 ⊆ (𝑓𝑤)))
102101cbvrabv 3426 . . . . . . . . . . . . . . . . . . . . . 22 {𝑥𝐵𝑧 ⊆ (𝑓𝑥)} = {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}
103102inteqi 4883 . . . . . . . . . . . . . . . . . . . . 21 {𝑥𝐵𝑧 ⊆ (𝑓𝑥)} = {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}
10499, 103eqtri 2766 . . . . . . . . . . . . . . . . . . . 20 𝐾 = {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}
105 onint 7640 . . . . . . . . . . . . . . . . . . . 20 (({𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ⊆ On ∧ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ≠ ∅) → {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
106104, 105eqeltrid 2843 . . . . . . . . . . . . . . . . . . 19 (({𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ⊆ On ∧ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ≠ ∅) → 𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
10798, 106sylan 580 . . . . . . . . . . . . . . . . . 18 ((𝐵 ∈ On ∧ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ≠ ∅) → 𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
10896, 107sylan2br 595 . . . . . . . . . . . . . . . . 17 ((𝐵 ∈ On ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → 𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
109 fveq2 6774 . . . . . . . . . . . . . . . . . . 19 (𝑤 = 𝐾 → (𝑓𝑤) = (𝑓𝐾))
110109sseq2d 3953 . . . . . . . . . . . . . . . . . 18 (𝑤 = 𝐾 → (𝑧 ⊆ (𝑓𝑤) ↔ 𝑧 ⊆ (𝑓𝐾)))
111110elrab 3624 . . . . . . . . . . . . . . . . 17 (𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ↔ (𝐾𝐵𝑧 ⊆ (𝑓𝐾)))
112108, 111sylib 217 . . . . . . . . . . . . . . . 16 ((𝐵 ∈ On ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → (𝐾𝐵𝑧 ⊆ (𝑓𝐾)))
113112ex 413 . . . . . . . . . . . . . . 15 (𝐵 ∈ On → (∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤) → (𝐾𝐵𝑧 ⊆ (𝑓𝐾))))
114113adantl 482 . . . . . . . . . . . . . 14 ((Ord 𝐴𝐵 ∈ On) → (∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤) → (𝐾𝐵𝑧 ⊆ (𝑓𝐾))))
115 simpr2 1194 . . . . . . . . . . . . . . . . . 18 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾))) → 𝐾𝐵)
116 simp3 1137 . . . . . . . . . . . . . . . . . . . . 21 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝑤𝐾)
117104eleq2i 2830 . . . . . . . . . . . . . . . . . . . . . 22 (𝑤𝐾𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
118 simp21 1205 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝑓:𝐵𝐴)
119 simp1l 1196 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → Ord 𝐴)
120119, 50syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝐴 ⊆ On)
121118, 120fssd 6618 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝑓:𝐵⟶On)
122 simp22 1206 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝐾𝐵)
123121, 122ffvelrnd 6962 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → (𝑓𝐾) ∈ On)
124 simp1r 1197 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝐵 ∈ On)
125 ontr1 6312 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝐵 ∈ On → ((𝑤𝐾𝐾𝐵) → 𝑤𝐵))
1261253impib 1115 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) → 𝑤𝐵)
127124, 116, 122, 126syl3anc 1370 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝑤𝐵)
128121, 127ffvelrnd 6962 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → (𝑓𝑤) ∈ On)
129 ontri1 6300 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑓𝐾) ∈ On ∧ (𝑓𝑤) ∈ On) → ((𝑓𝐾) ⊆ (𝑓𝑤) ↔ ¬ (𝑓𝑤) ∈ (𝑓𝐾)))
130123, 128, 129syl2anc 584 . . . . . . . . . . . . . . . . . . . . . . . 24 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → ((𝑓𝐾) ⊆ (𝑓𝑤) ↔ ¬ (𝑓𝑤) ∈ (𝑓𝐾)))
131 simp23 1207 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → 𝑧 ⊆ (𝑓𝐾))
132 simpl1 1190 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) ∧ (𝑧 ⊆ (𝑓𝐾) ∧ (𝑓𝐾) ⊆ (𝑓𝑤))) → 𝐵 ∈ On)
133132, 98syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) ∧ (𝑧 ⊆ (𝑓𝐾) ∧ (𝑓𝐾) ⊆ (𝑓𝑤))) → {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ⊆ On)
134 sstr 3929 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((𝑧 ⊆ (𝑓𝐾) ∧ (𝑓𝐾) ⊆ (𝑓𝑤)) → 𝑧 ⊆ (𝑓𝑤))
135126, 134anim12i 613 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) ∧ (𝑧 ⊆ (𝑓𝐾) ∧ (𝑓𝐾) ⊆ (𝑓𝑤))) → (𝑤𝐵𝑧 ⊆ (𝑓𝑤)))
136 rabid 3310 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑤 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ↔ (𝑤𝐵𝑧 ⊆ (𝑓𝑤)))
137135, 136sylibr 233 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) ∧ (𝑧 ⊆ (𝑓𝐾) ∧ (𝑓𝐾) ⊆ (𝑓𝑤))) → 𝑤 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
138 onnmin 7648 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (({𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ⊆ On ∧ 𝑤 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}) → ¬ 𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
139133, 137, 138syl2anc 584 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) ∧ (𝑧 ⊆ (𝑓𝐾) ∧ (𝑓𝐾) ⊆ (𝑓𝑤))) → ¬ 𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)})
140139expr 457 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝐵 ∈ On ∧ 𝑤𝐾𝐾𝐵) ∧ 𝑧 ⊆ (𝑓𝐾)) → ((𝑓𝐾) ⊆ (𝑓𝑤) → ¬ 𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}))
141124, 116, 122, 131, 140syl31anc 1372 . . . . . . . . . . . . . . . . . . . . . . . 24 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → ((𝑓𝐾) ⊆ (𝑓𝑤) → ¬ 𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}))
142130, 141sylbird 259 . . . . . . . . . . . . . . . . . . . . . . 23 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → (¬ (𝑓𝑤) ∈ (𝑓𝐾) → ¬ 𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}))
143142con4d 115 . . . . . . . . . . . . . . . . . . . . . 22 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → (𝑤 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} → (𝑓𝑤) ∈ (𝑓𝐾)))
144117, 143syl5bi 241 . . . . . . . . . . . . . . . . . . . . 21 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → (𝑤𝐾 → (𝑓𝑤) ∈ (𝑓𝐾)))
145116, 144mpd 15 . . . . . . . . . . . . . . . . . . . 20 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) ∧ 𝑤𝐾) → (𝑓𝑤) ∈ (𝑓𝐾))
1461453expia 1120 . . . . . . . . . . . . . . . . . . 19 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾))) → (𝑤𝐾 → (𝑓𝑤) ∈ (𝑓𝐾)))
147146ralrimiv 3102 . . . . . . . . . . . . . . . . . 18 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾))) → ∀𝑤𝐾 (𝑓𝑤) ∈ (𝑓𝐾))
148 fveq2 6774 . . . . . . . . . . . . . . . . . . . . 21 (𝑦 = 𝐾 → (𝑓𝑦) = (𝑓𝐾))
149148eleq2d 2824 . . . . . . . . . . . . . . . . . . . 20 (𝑦 = 𝐾 → ((𝑓𝑤) ∈ (𝑓𝑦) ↔ (𝑓𝑤) ∈ (𝑓𝐾)))
150149raleqbi1dv 3340 . . . . . . . . . . . . . . . . . . 19 (𝑦 = 𝐾 → (∀𝑤𝑦 (𝑓𝑤) ∈ (𝑓𝑦) ↔ ∀𝑤𝐾 (𝑓𝑤) ∈ (𝑓𝐾)))
151150, 1elrab2 3627 . . . . . . . . . . . . . . . . . 18 (𝐾𝐶 ↔ (𝐾𝐵 ∧ ∀𝑤𝐾 (𝑓𝑤) ∈ (𝑓𝐾)))
152115, 147, 151sylanbrc 583 . . . . . . . . . . . . . . . . 17 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾))) → 𝐾𝐶)
153152expcom 414 . . . . . . . . . . . . . . . 16 ((𝑓:𝐵𝐴𝐾𝐵𝑧 ⊆ (𝑓𝐾)) → ((Ord 𝐴𝐵 ∈ On) → 𝐾𝐶))
1541533expib 1121 . . . . . . . . . . . . . . 15 (𝑓:𝐵𝐴 → ((𝐾𝐵𝑧 ⊆ (𝑓𝐾)) → ((Ord 𝐴𝐵 ∈ On) → 𝐾𝐶)))
155154com13 88 . . . . . . . . . . . . . 14 ((Ord 𝐴𝐵 ∈ On) → ((𝐾𝐵𝑧 ⊆ (𝑓𝐾)) → (𝑓:𝐵𝐴𝐾𝐶)))
156114, 155syld 47 . . . . . . . . . . . . 13 ((Ord 𝐴𝐵 ∈ On) → (∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤) → (𝑓:𝐵𝐴𝐾𝐶)))
157156com23 86 . . . . . . . . . . . 12 ((Ord 𝐴𝐵 ∈ On) → (𝑓:𝐵𝐴 → (∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤) → 𝐾𝐶)))
158157imp31 418 . . . . . . . . . . 11 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → 𝐾𝐶)
159 foelrn 6982 . . . . . . . . . . 11 ((𝑂:dom 𝑂onto𝐶𝐾𝐶) → ∃𝑣 ∈ dom 𝑂 𝐾 = (𝑂𝑣))
16016, 158, 159syl2an2r 682 . . . . . . . . . 10 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → ∃𝑣 ∈ dom 𝑂 𝐾 = (𝑂𝑣))
161 eleq1 2826 . . . . . . . . . . . . . . . 16 (𝐾 = (𝑂𝑣) → (𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ↔ (𝑂𝑣) ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}))
162161biimpcd 248 . . . . . . . . . . . . . . 15 (𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} → (𝐾 = (𝑂𝑣) → (𝑂𝑣) ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)}))
163 fveq2 6774 . . . . . . . . . . . . . . . . . 18 (𝑥 = (𝑂𝑣) → (𝑓𝑥) = (𝑓‘(𝑂𝑣)))
164163sseq2d 3953 . . . . . . . . . . . . . . . . 17 (𝑥 = (𝑂𝑣) → (𝑧 ⊆ (𝑓𝑥) ↔ 𝑧 ⊆ (𝑓‘(𝑂𝑣))))
16565sseq2d 3953 . . . . . . . . . . . . . . . . . 18 (𝑤 = 𝑥 → (𝑧 ⊆ (𝑓𝑤) ↔ 𝑧 ⊆ (𝑓𝑥)))
166165cbvrabv 3426 . . . . . . . . . . . . . . . . 17 {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} = {𝑥𝐵𝑧 ⊆ (𝑓𝑥)}
167164, 166elrab2 3627 . . . . . . . . . . . . . . . 16 ((𝑂𝑣) ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} ↔ ((𝑂𝑣) ∈ 𝐵𝑧 ⊆ (𝑓‘(𝑂𝑣))))
168167simprbi 497 . . . . . . . . . . . . . . 15 ((𝑂𝑣) ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} → 𝑧 ⊆ (𝑓‘(𝑂𝑣)))
169162, 168syl6 35 . . . . . . . . . . . . . 14 (𝐾 ∈ {𝑤𝐵𝑧 ⊆ (𝑓𝑤)} → (𝐾 = (𝑂𝑣) → 𝑧 ⊆ (𝑓‘(𝑂𝑣))))
170108, 169syl 17 . . . . . . . . . . . . 13 ((𝐵 ∈ On ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → (𝐾 = (𝑂𝑣) → 𝑧 ⊆ (𝑓‘(𝑂𝑣))))
171170ad5ant24 758 . . . . . . . . . . . 12 (((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) ∧ 𝑣 ∈ dom 𝑂) → (𝐾 = (𝑂𝑣) → 𝑧 ⊆ (𝑓‘(𝑂𝑣))))
17220ad2antrr 723 . . . . . . . . . . . . . 14 (((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) ∧ 𝑣 ∈ dom 𝑂) → 𝑂:dom 𝑂𝐵)
173 fvco3 6867 . . . . . . . . . . . . . 14 ((𝑂:dom 𝑂𝐵𝑣 ∈ dom 𝑂) → ((𝑓𝑂)‘𝑣) = (𝑓‘(𝑂𝑣)))
174172, 173sylancom 588 . . . . . . . . . . . . 13 (((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) ∧ 𝑣 ∈ dom 𝑂) → ((𝑓𝑂)‘𝑣) = (𝑓‘(𝑂𝑣)))
175174sseq2d 3953 . . . . . . . . . . . 12 (((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) ∧ 𝑣 ∈ dom 𝑂) → (𝑧 ⊆ ((𝑓𝑂)‘𝑣) ↔ 𝑧 ⊆ (𝑓‘(𝑂𝑣))))
176171, 175sylibrd 258 . . . . . . . . . . 11 (((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) ∧ 𝑣 ∈ dom 𝑂) → (𝐾 = (𝑂𝑣) → 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
177176reximdva 3203 . . . . . . . . . 10 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → (∃𝑣 ∈ dom 𝑂 𝐾 = (𝑂𝑣) → ∃𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
178160, 177mpd 15 . . . . . . . . 9 ((((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) ∧ ∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → ∃𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣))
179178ex 413 . . . . . . . 8 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → (∃𝑤𝐵 𝑧 ⊆ (𝑓𝑤) → ∃𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
180179ralimdv 3109 . . . . . . 7 (((Ord 𝐴𝐵 ∈ On) ∧ 𝑓:𝐵𝐴) → (∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤) → ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
181180impr 455 . . . . . 6 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣))
18247, 95, 1813jca 1127 . . . . 5 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → ((𝑓𝑂):dom 𝑂𝐴 ∧ Smo (𝑓𝑂) ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
183 feq1 6581 . . . . . 6 (𝑔 = (𝑓𝑂) → (𝑔:dom 𝑂𝐴 ↔ (𝑓𝑂):dom 𝑂𝐴))
184 smoeq 8181 . . . . . 6 (𝑔 = (𝑓𝑂) → (Smo 𝑔 ↔ Smo (𝑓𝑂)))
185 fveq1 6773 . . . . . . . . 9 (𝑔 = (𝑓𝑂) → (𝑔𝑣) = ((𝑓𝑂)‘𝑣))
186185sseq2d 3953 . . . . . . . 8 (𝑔 = (𝑓𝑂) → (𝑧 ⊆ (𝑔𝑣) ↔ 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
187186rexbidv 3226 . . . . . . 7 (𝑔 = (𝑓𝑂) → (∃𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣) ↔ ∃𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
188187ralbidv 3112 . . . . . 6 (𝑔 = (𝑓𝑂) → (∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣) ↔ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣)))
189183, 184, 1883anbi123d 1435 . . . . 5 (𝑔 = (𝑓𝑂) → ((𝑔:dom 𝑂𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣)) ↔ ((𝑓𝑂):dom 𝑂𝐴 ∧ Smo (𝑓𝑂) ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ ((𝑓𝑂)‘𝑣))))
19044, 182, 189spcedv 3537 . . . 4 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → ∃𝑔(𝑔:dom 𝑂𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣)))
191 feq2 6582 . . . . . . 7 (𝑥 = dom 𝑂 → (𝑔:𝑥𝐴𝑔:dom 𝑂𝐴))
192 rexeq 3343 . . . . . . . 8 (𝑥 = dom 𝑂 → (∃𝑣𝑥 𝑧 ⊆ (𝑔𝑣) ↔ ∃𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣)))
193192ralbidv 3112 . . . . . . 7 (𝑥 = dom 𝑂 → (∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣) ↔ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣)))
194191, 1933anbi13d 1437 . . . . . 6 (𝑥 = dom 𝑂 → ((𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣)) ↔ (𝑔:dom 𝑂𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣))))
195194exbidv 1924 . . . . 5 (𝑥 = dom 𝑂 → (∃𝑔(𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣)) ↔ ∃𝑔(𝑔:dom 𝑂𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣))))
196195rspcev 3561 . . . 4 ((dom 𝑂 ∈ suc 𝐵 ∧ ∃𝑔(𝑔:dom 𝑂𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣 ∈ dom 𝑂 𝑧 ⊆ (𝑔𝑣))) → ∃𝑥 ∈ suc 𝐵𝑔(𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣)))
19738, 190, 196syl2anc 584 . . 3 (((Ord 𝐴𝐵 ∈ On) ∧ (𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤))) → ∃𝑥 ∈ suc 𝐵𝑔(𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣)))
198197ex 413 . 2 ((Ord 𝐴𝐵 ∈ On) → ((𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → ∃𝑥 ∈ suc 𝐵𝑔(𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣))))
199198exlimdv 1936 1 ((Ord 𝐴𝐵 ∈ On) → (∃𝑓(𝑓:𝐵𝐴 ∧ ∀𝑧𝐴𝑤𝐵 𝑧 ⊆ (𝑓𝑤)) → ∃𝑥 ∈ suc 𝐵𝑔(𝑔:𝑥𝐴 ∧ Smo 𝑔 ∧ ∀𝑧𝐴𝑣𝑥 𝑧 ⊆ (𝑔𝑣))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 205  wa 396  w3a 1086   = wceq 1539  wex 1782  wcel 2106  wne 2943  wral 3064  wrex 3065  {crab 3068  Vcvv 3432  wss 3887  c0 4256   cint 4879   E cep 5494   We wwe 5543  dom cdm 5589  ccom 5593  Ord word 6265  Oncon0 6266  suc csuc 6268   Fn wfn 6428  wf 6429  ontowfo 6431  1-1-ontowf1o 6432  cfv 6433   Isom wiso 6434  Smo wsmo 8176  OrdIsocoi 9268
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-se 5545  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-pred 6202  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-isom 6442  df-riota 7232  df-ov 7278  df-2nd 7832  df-frecs 8097  df-wrecs 8128  df-smo 8177  df-recs 8202  df-oi 9269
This theorem is referenced by:  cfcof  10030
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