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Theorem oewordri 7956
 Description: Weak ordering property of ordinal exponentiation. Proposition 8.35 of [TakeutiZaring] p. 68. (Contributed by NM, 6-Jan-2005.)
Assertion
Ref Expression
oewordri ((𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴𝐵 → (𝐴o 𝐶) ⊆ (𝐵o 𝐶)))

Proof of Theorem oewordri
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 oveq2 6930 . . . . 5 (𝑥 = ∅ → (𝐴o 𝑥) = (𝐴o ∅))
2 oveq2 6930 . . . . 5 (𝑥 = ∅ → (𝐵o 𝑥) = (𝐵o ∅))
31, 2sseq12d 3852 . . . 4 (𝑥 = ∅ → ((𝐴o 𝑥) ⊆ (𝐵o 𝑥) ↔ (𝐴o ∅) ⊆ (𝐵o ∅)))
4 oveq2 6930 . . . . 5 (𝑥 = 𝑦 → (𝐴o 𝑥) = (𝐴o 𝑦))
5 oveq2 6930 . . . . 5 (𝑥 = 𝑦 → (𝐵o 𝑥) = (𝐵o 𝑦))
64, 5sseq12d 3852 . . . 4 (𝑥 = 𝑦 → ((𝐴o 𝑥) ⊆ (𝐵o 𝑥) ↔ (𝐴o 𝑦) ⊆ (𝐵o 𝑦)))
7 oveq2 6930 . . . . 5 (𝑥 = suc 𝑦 → (𝐴o 𝑥) = (𝐴o suc 𝑦))
8 oveq2 6930 . . . . 5 (𝑥 = suc 𝑦 → (𝐵o 𝑥) = (𝐵o suc 𝑦))
97, 8sseq12d 3852 . . . 4 (𝑥 = suc 𝑦 → ((𝐴o 𝑥) ⊆ (𝐵o 𝑥) ↔ (𝐴o suc 𝑦) ⊆ (𝐵o suc 𝑦)))
10 oveq2 6930 . . . . 5 (𝑥 = 𝐶 → (𝐴o 𝑥) = (𝐴o 𝐶))
11 oveq2 6930 . . . . 5 (𝑥 = 𝐶 → (𝐵o 𝑥) = (𝐵o 𝐶))
1210, 11sseq12d 3852 . . . 4 (𝑥 = 𝐶 → ((𝐴o 𝑥) ⊆ (𝐵o 𝑥) ↔ (𝐴o 𝐶) ⊆ (𝐵o 𝐶)))
13 onelon 6001 . . . . . . 7 ((𝐵 ∈ On ∧ 𝐴𝐵) → 𝐴 ∈ On)
14 oe0 7886 . . . . . . 7 (𝐴 ∈ On → (𝐴o ∅) = 1o)
1513, 14syl 17 . . . . . 6 ((𝐵 ∈ On ∧ 𝐴𝐵) → (𝐴o ∅) = 1o)
16 oe0 7886 . . . . . . 7 (𝐵 ∈ On → (𝐵o ∅) = 1o)
1716adantr 474 . . . . . 6 ((𝐵 ∈ On ∧ 𝐴𝐵) → (𝐵o ∅) = 1o)
1815, 17eqtr4d 2816 . . . . 5 ((𝐵 ∈ On ∧ 𝐴𝐵) → (𝐴o ∅) = (𝐵o ∅))
19 eqimss 3875 . . . . 5 ((𝐴o ∅) = (𝐵o ∅) → (𝐴o ∅) ⊆ (𝐵o ∅))
2018, 19syl 17 . . . 4 ((𝐵 ∈ On ∧ 𝐴𝐵) → (𝐴o ∅) ⊆ (𝐵o ∅))
21 simpl 476 . . . . . 6 ((𝐵 ∈ On ∧ 𝐴𝐵) → 𝐵 ∈ On)
22 onelss 6018 . . . . . . 7 (𝐵 ∈ On → (𝐴𝐵𝐴𝐵))
2322imp 397 . . . . . 6 ((𝐵 ∈ On ∧ 𝐴𝐵) → 𝐴𝐵)
2413, 21, 23jca31 510 . . . . 5 ((𝐵 ∈ On ∧ 𝐴𝐵) → ((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝐴𝐵))
25 oecl 7901 . . . . . . . . . . . . . 14 ((𝐴 ∈ On ∧ 𝑦 ∈ On) → (𝐴o 𝑦) ∈ On)
26253adant2 1122 . . . . . . . . . . . . 13 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐴o 𝑦) ∈ On)
27 oecl 7901 . . . . . . . . . . . . . 14 ((𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐵o 𝑦) ∈ On)
28273adant1 1121 . . . . . . . . . . . . 13 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐵o 𝑦) ∈ On)
29 simp1 1127 . . . . . . . . . . . . 13 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → 𝐴 ∈ On)
30 omwordri 7936 . . . . . . . . . . . . 13 (((𝐴o 𝑦) ∈ On ∧ (𝐵o 𝑦) ∈ On ∧ 𝐴 ∈ On) → ((𝐴o 𝑦) ⊆ (𝐵o 𝑦) → ((𝐴o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐴)))
3126, 28, 29, 30syl3anc 1439 . . . . . . . . . . . 12 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → ((𝐴o 𝑦) ⊆ (𝐵o 𝑦) → ((𝐴o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐴)))
3231imp 397 . . . . . . . . . . 11 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦)) → ((𝐴o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐴))
3332adantrl 706 . . . . . . . . . 10 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴𝐵 ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦))) → ((𝐴o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐴))
34 omwordi 7935 . . . . . . . . . . . . 13 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ (𝐵o 𝑦) ∈ On) → (𝐴𝐵 → ((𝐵o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐵)))
3528, 34syld3an3 1477 . . . . . . . . . . . 12 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐴𝐵 → ((𝐵o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐵)))
3635imp 397 . . . . . . . . . . 11 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ 𝐴𝐵) → ((𝐵o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐵))
3736adantrr 707 . . . . . . . . . 10 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴𝐵 ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦))) → ((𝐵o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐵))
3833, 37sstrd 3830 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴𝐵 ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦))) → ((𝐴o 𝑦) ·o 𝐴) ⊆ ((𝐵o 𝑦) ·o 𝐵))
39 oesuc 7891 . . . . . . . . . . 11 ((𝐴 ∈ On ∧ 𝑦 ∈ On) → (𝐴o suc 𝑦) = ((𝐴o 𝑦) ·o 𝐴))
40393adant2 1122 . . . . . . . . . 10 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐴o suc 𝑦) = ((𝐴o 𝑦) ·o 𝐴))
4140adantr 474 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴𝐵 ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦))) → (𝐴o suc 𝑦) = ((𝐴o 𝑦) ·o 𝐴))
42 oesuc 7891 . . . . . . . . . . 11 ((𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐵o suc 𝑦) = ((𝐵o 𝑦) ·o 𝐵))
43423adant1 1121 . . . . . . . . . 10 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐵o suc 𝑦) = ((𝐵o 𝑦) ·o 𝐵))
4443adantr 474 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴𝐵 ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦))) → (𝐵o suc 𝑦) = ((𝐵o 𝑦) ·o 𝐵))
4538, 41, 443sstr4d 3866 . . . . . . . 8 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐴𝐵 ∧ (𝐴o 𝑦) ⊆ (𝐵o 𝑦))) → (𝐴o suc 𝑦) ⊆ (𝐵o suc 𝑦))
4645exp520 1419 . . . . . . 7 (𝐴 ∈ On → (𝐵 ∈ On → (𝑦 ∈ On → (𝐴𝐵 → ((𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o suc 𝑦) ⊆ (𝐵o suc 𝑦))))))
4746com3r 87 . . . . . 6 (𝑦 ∈ On → (𝐴 ∈ On → (𝐵 ∈ On → (𝐴𝐵 → ((𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o suc 𝑦) ⊆ (𝐵o suc 𝑦))))))
4847imp4c 416 . . . . 5 (𝑦 ∈ On → (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝐴𝐵) → ((𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o suc 𝑦) ⊆ (𝐵o suc 𝑦))))
4924, 48syl5 34 . . . 4 (𝑦 ∈ On → ((𝐵 ∈ On ∧ 𝐴𝐵) → ((𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o suc 𝑦) ⊆ (𝐵o suc 𝑦))))
50 vex 3400 . . . . . . . . . . . 12 𝑥 ∈ V
51 limelon 6039 . . . . . . . . . . . 12 ((𝑥 ∈ V ∧ Lim 𝑥) → 𝑥 ∈ On)
5250, 51mpan 680 . . . . . . . . . . 11 (Lim 𝑥𝑥 ∈ On)
53 0ellim 6038 . . . . . . . . . . 11 (Lim 𝑥 → ∅ ∈ 𝑥)
54 oe0m1 7885 . . . . . . . . . . . 12 (𝑥 ∈ On → (∅ ∈ 𝑥 ↔ (∅ ↑o 𝑥) = ∅))
5554biimpa 470 . . . . . . . . . . 11 ((𝑥 ∈ On ∧ ∅ ∈ 𝑥) → (∅ ↑o 𝑥) = ∅)
5652, 53, 55syl2anc 579 . . . . . . . . . 10 (Lim 𝑥 → (∅ ↑o 𝑥) = ∅)
57 0ss 4197 . . . . . . . . . 10 ∅ ⊆ (𝐵o 𝑥)
5856, 57syl6eqss 3873 . . . . . . . . 9 (Lim 𝑥 → (∅ ↑o 𝑥) ⊆ (𝐵o 𝑥))
59 oveq1 6929 . . . . . . . . . 10 (𝐴 = ∅ → (𝐴o 𝑥) = (∅ ↑o 𝑥))
6059sseq1d 3850 . . . . . . . . 9 (𝐴 = ∅ → ((𝐴o 𝑥) ⊆ (𝐵o 𝑥) ↔ (∅ ↑o 𝑥) ⊆ (𝐵o 𝑥)))
6158, 60syl5ibr 238 . . . . . . . 8 (𝐴 = ∅ → (Lim 𝑥 → (𝐴o 𝑥) ⊆ (𝐵o 𝑥)))
6261adantl 475 . . . . . . 7 (((𝐵 ∈ On ∧ 𝐴𝐵) ∧ 𝐴 = ∅) → (Lim 𝑥 → (𝐴o 𝑥) ⊆ (𝐵o 𝑥)))
6362a1dd 50 . . . . . 6 (((𝐵 ∈ On ∧ 𝐴𝐵) ∧ 𝐴 = ∅) → (Lim 𝑥 → (∀𝑦𝑥 (𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o 𝑥) ⊆ (𝐵o 𝑥))))
64 ss2iun 4769 . . . . . . . 8 (∀𝑦𝑥 (𝐴o 𝑦) ⊆ (𝐵o 𝑦) → 𝑦𝑥 (𝐴o 𝑦) ⊆ 𝑦𝑥 (𝐵o 𝑦))
65 oelim 7898 . . . . . . . . . . . 12 (((𝐴 ∈ On ∧ (𝑥 ∈ V ∧ Lim 𝑥)) ∧ ∅ ∈ 𝐴) → (𝐴o 𝑥) = 𝑦𝑥 (𝐴o 𝑦))
6650, 65mpanlr1 696 . . . . . . . . . . 11 (((𝐴 ∈ On ∧ Lim 𝑥) ∧ ∅ ∈ 𝐴) → (𝐴o 𝑥) = 𝑦𝑥 (𝐴o 𝑦))
6766an32s 642 . . . . . . . . . 10 (((𝐴 ∈ On ∧ ∅ ∈ 𝐴) ∧ Lim 𝑥) → (𝐴o 𝑥) = 𝑦𝑥 (𝐴o 𝑦))
6867adantllr 709 . . . . . . . . 9 ((((𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)) ∧ ∅ ∈ 𝐴) ∧ Lim 𝑥) → (𝐴o 𝑥) = 𝑦𝑥 (𝐴o 𝑦))
6921anim1i 608 . . . . . . . . . . 11 (((𝐵 ∈ On ∧ 𝐴𝐵) ∧ Lim 𝑥) → (𝐵 ∈ On ∧ Lim 𝑥))
70 ne0i 4148 . . . . . . . . . . . . . 14 (𝐴𝐵𝐵 ≠ ∅)
71 on0eln0 6031 . . . . . . . . . . . . . 14 (𝐵 ∈ On → (∅ ∈ 𝐵𝐵 ≠ ∅))
7270, 71syl5ibr 238 . . . . . . . . . . . . 13 (𝐵 ∈ On → (𝐴𝐵 → ∅ ∈ 𝐵))
7372imp 397 . . . . . . . . . . . 12 ((𝐵 ∈ On ∧ 𝐴𝐵) → ∅ ∈ 𝐵)
7473adantr 474 . . . . . . . . . . 11 (((𝐵 ∈ On ∧ 𝐴𝐵) ∧ Lim 𝑥) → ∅ ∈ 𝐵)
75 oelim 7898 . . . . . . . . . . . 12 (((𝐵 ∈ On ∧ (𝑥 ∈ V ∧ Lim 𝑥)) ∧ ∅ ∈ 𝐵) → (𝐵o 𝑥) = 𝑦𝑥 (𝐵o 𝑦))
7650, 75mpanlr1 696 . . . . . . . . . . 11 (((𝐵 ∈ On ∧ Lim 𝑥) ∧ ∅ ∈ 𝐵) → (𝐵o 𝑥) = 𝑦𝑥 (𝐵o 𝑦))
7769, 74, 76syl2anc 579 . . . . . . . . . 10 (((𝐵 ∈ On ∧ 𝐴𝐵) ∧ Lim 𝑥) → (𝐵o 𝑥) = 𝑦𝑥 (𝐵o 𝑦))
7877ad4ant24 744 . . . . . . . . 9 ((((𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)) ∧ ∅ ∈ 𝐴) ∧ Lim 𝑥) → (𝐵o 𝑥) = 𝑦𝑥 (𝐵o 𝑦))
7968, 78sseq12d 3852 . . . . . . . 8 ((((𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)) ∧ ∅ ∈ 𝐴) ∧ Lim 𝑥) → ((𝐴o 𝑥) ⊆ (𝐵o 𝑥) ↔ 𝑦𝑥 (𝐴o 𝑦) ⊆ 𝑦𝑥 (𝐵o 𝑦)))
8064, 79syl5ibr 238 . . . . . . 7 ((((𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)) ∧ ∅ ∈ 𝐴) ∧ Lim 𝑥) → (∀𝑦𝑥 (𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o 𝑥) ⊆ (𝐵o 𝑥)))
8180ex 403 . . . . . 6 (((𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)) ∧ ∅ ∈ 𝐴) → (Lim 𝑥 → (∀𝑦𝑥 (𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o 𝑥) ⊆ (𝐵o 𝑥))))
8263, 81oe0lem 7877 . . . . 5 ((𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)) → (Lim 𝑥 → (∀𝑦𝑥 (𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o 𝑥) ⊆ (𝐵o 𝑥))))
8313ancri 545 . . . . 5 ((𝐵 ∈ On ∧ 𝐴𝐵) → (𝐴 ∈ On ∧ (𝐵 ∈ On ∧ 𝐴𝐵)))
8482, 83syl11 33 . . . 4 (Lim 𝑥 → ((𝐵 ∈ On ∧ 𝐴𝐵) → (∀𝑦𝑥 (𝐴o 𝑦) ⊆ (𝐵o 𝑦) → (𝐴o 𝑥) ⊆ (𝐵o 𝑥))))
853, 6, 9, 12, 20, 49, 84tfinds3 7342 . . 3 (𝐶 ∈ On → ((𝐵 ∈ On ∧ 𝐴𝐵) → (𝐴o 𝐶) ⊆ (𝐵o 𝐶)))
8685expd 406 . 2 (𝐶 ∈ On → (𝐵 ∈ On → (𝐴𝐵 → (𝐴o 𝐶) ⊆ (𝐵o 𝐶))))
8786impcom 398 1 ((𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴𝐵 → (𝐴o 𝐶) ⊆ (𝐵o 𝐶)))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 386   ∧ w3a 1071   = wceq 1601   ∈ wcel 2106   ≠ wne 2968  ∀wral 3089  Vcvv 3397   ⊆ wss 3791  ∅c0 4140  ∪ ciun 4753  Oncon0 5976  Lim wlim 5977  suc csuc 5978  (class class class)co 6922  1oc1o 7836   ·o comu 7841   ↑o coe 7842 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1839  ax-4 1853  ax-5 1953  ax-6 2021  ax-7 2054  ax-8 2108  ax-9 2115  ax-10 2134  ax-11 2149  ax-12 2162  ax-13 2333  ax-ext 2753  ax-rep 5006  ax-sep 5017  ax-nul 5025  ax-pow 5077  ax-pr 5138  ax-un 7226 This theorem depends on definitions:  df-bi 199  df-an 387  df-or 837  df-3or 1072  df-3an 1073  df-tru 1605  df-ex 1824  df-nf 1828  df-sb 2012  df-mo 2550  df-eu 2586  df-clab 2763  df-cleq 2769  df-clel 2773  df-nfc 2920  df-ne 2969  df-ral 3094  df-rex 3095  df-reu 3096  df-rab 3098  df-v 3399  df-sbc 3652  df-csb 3751  df-dif 3794  df-un 3796  df-in 3798  df-ss 3805  df-pss 3807  df-nul 4141  df-if 4307  df-pw 4380  df-sn 4398  df-pr 4400  df-tp 4402  df-op 4404  df-uni 4672  df-iun 4755  df-br 4887  df-opab 4949  df-mpt 4966  df-tr 4988  df-id 5261  df-eprel 5266  df-po 5274  df-so 5275  df-fr 5314  df-we 5316  df-xp 5361  df-rel 5362  df-cnv 5363  df-co 5364  df-dm 5365  df-rn 5366  df-res 5367  df-ima 5368  df-pred 5933  df-ord 5979  df-on 5980  df-lim 5981  df-suc 5982  df-iota 6099  df-fun 6137  df-fn 6138  df-f 6139  df-f1 6140  df-fo 6141  df-f1o 6142  df-fv 6143  df-ov 6925  df-oprab 6926  df-mpt2 6927  df-om 7344  df-wrecs 7689  df-recs 7751  df-rdg 7789  df-1o 7843  df-oadd 7847  df-omul 7848  df-oexp 7849 This theorem is referenced by:  oeordsuc  7958
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