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Theorem omordi 7533
 Description: Ordering property of ordinal multiplication. Half of Proposition 8.19 of [TakeutiZaring] p. 63. (Contributed by NM, 14-Dec-2004.)
Assertion
Ref Expression
omordi (((𝐵 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))

Proof of Theorem omordi
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 onelon 5665 . . . . . 6 ((𝐵 ∈ On ∧ 𝐴𝐵) → 𝐴 ∈ On)
21ex 449 . . . . 5 (𝐵 ∈ On → (𝐴𝐵𝐴 ∈ On))
3 eleq2 2677 . . . . . . . . . 10 (𝑥 = ∅ → (𝐴𝑥𝐴 ∈ ∅))
4 oveq2 6557 . . . . . . . . . . 11 (𝑥 = ∅ → (𝐶 ·𝑜 𝑥) = (𝐶 ·𝑜 ∅))
54eleq2d 2673 . . . . . . . . . 10 (𝑥 = ∅ → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥) ↔ (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 ∅)))
63, 5imbi12d 333 . . . . . . . . 9 (𝑥 = ∅ → ((𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥)) ↔ (𝐴 ∈ ∅ → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 ∅))))
7 eleq2 2677 . . . . . . . . . 10 (𝑥 = 𝑦 → (𝐴𝑥𝐴𝑦))
8 oveq2 6557 . . . . . . . . . . 11 (𝑥 = 𝑦 → (𝐶 ·𝑜 𝑥) = (𝐶 ·𝑜 𝑦))
98eleq2d 2673 . . . . . . . . . 10 (𝑥 = 𝑦 → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥) ↔ (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))
107, 9imbi12d 333 . . . . . . . . 9 (𝑥 = 𝑦 → ((𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥)) ↔ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦))))
11 eleq2 2677 . . . . . . . . . 10 (𝑥 = suc 𝑦 → (𝐴𝑥𝐴 ∈ suc 𝑦))
12 oveq2 6557 . . . . . . . . . . 11 (𝑥 = suc 𝑦 → (𝐶 ·𝑜 𝑥) = (𝐶 ·𝑜 suc 𝑦))
1312eleq2d 2673 . . . . . . . . . 10 (𝑥 = suc 𝑦 → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥) ↔ (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦)))
1411, 13imbi12d 333 . . . . . . . . 9 (𝑥 = suc 𝑦 → ((𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥)) ↔ (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦))))
15 eleq2 2677 . . . . . . . . . 10 (𝑥 = 𝐵 → (𝐴𝑥𝐴𝐵))
16 oveq2 6557 . . . . . . . . . . 11 (𝑥 = 𝐵 → (𝐶 ·𝑜 𝑥) = (𝐶 ·𝑜 𝐵))
1716eleq2d 2673 . . . . . . . . . 10 (𝑥 = 𝐵 → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥) ↔ (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))
1815, 17imbi12d 333 . . . . . . . . 9 (𝑥 = 𝐵 → ((𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥)) ↔ (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵))))
19 noel 3878 . . . . . . . . . . 11 ¬ 𝐴 ∈ ∅
2019pm2.21i 115 . . . . . . . . . 10 (𝐴 ∈ ∅ → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 ∅))
2120a1i 11 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐴 ∈ ∅ → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 ∅)))
22 elsuci 5708 . . . . . . . . . . . . . . 15 (𝐴 ∈ suc 𝑦 → (𝐴𝑦𝐴 = 𝑦))
23 omcl 7503 . . . . . . . . . . . . . . . . 17 ((𝐶 ∈ On ∧ 𝑦 ∈ On) → (𝐶 ·𝑜 𝑦) ∈ On)
24 simpl 472 . . . . . . . . . . . . . . . . 17 ((𝐶 ∈ On ∧ 𝑦 ∈ On) → 𝐶 ∈ On)
2523, 24jca 553 . . . . . . . . . . . . . . . 16 ((𝐶 ∈ On ∧ 𝑦 ∈ On) → ((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On))
26 oaword1 7519 . . . . . . . . . . . . . . . . . . . . 21 (((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) → (𝐶 ·𝑜 𝑦) ⊆ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶))
2726sseld 3567 . . . . . . . . . . . . . . . . . . . 20 (((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦) → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
2827imim2d 55 . . . . . . . . . . . . . . . . . . 19 (((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) → ((𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)) → (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶))))
2928imp 444 . . . . . . . . . . . . . . . . . 18 ((((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦))) → (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3029adantrl 748 . . . . . . . . . . . . . . . . 17 ((((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
31 oaord1 7518 . . . . . . . . . . . . . . . . . . . 20 (((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) → (∅ ∈ 𝐶 ↔ (𝐶 ·𝑜 𝑦) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3231biimpa 500 . . . . . . . . . . . . . . . . . . 19 ((((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝑦) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶))
33 oveq2 6557 . . . . . . . . . . . . . . . . . . . 20 (𝐴 = 𝑦 → (𝐶 ·𝑜 𝐴) = (𝐶 ·𝑜 𝑦))
3433eleq1d 2672 . . . . . . . . . . . . . . . . . . 19 (𝐴 = 𝑦 → ((𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶) ↔ (𝐶 ·𝑜 𝑦) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3532, 34syl5ibrcom 236 . . . . . . . . . . . . . . . . . 18 ((((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐴 = 𝑦 → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3635adantrr 749 . . . . . . . . . . . . . . . . 17 ((((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → (𝐴 = 𝑦 → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3730, 36jaod 394 . . . . . . . . . . . . . . . 16 ((((𝐶 ·𝑜 𝑦) ∈ On ∧ 𝐶 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → ((𝐴𝑦𝐴 = 𝑦) → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3825, 37sylan 487 . . . . . . . . . . . . . . 15 (((𝐶 ∈ On ∧ 𝑦 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → ((𝐴𝑦𝐴 = 𝑦) → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
3922, 38syl5 33 . . . . . . . . . . . . . 14 (((𝐶 ∈ On ∧ 𝑦 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
40 omsuc 7493 . . . . . . . . . . . . . . . 16 ((𝐶 ∈ On ∧ 𝑦 ∈ On) → (𝐶 ·𝑜 suc 𝑦) = ((𝐶 ·𝑜 𝑦) +𝑜 𝐶))
4140eleq2d 2673 . . . . . . . . . . . . . . 15 ((𝐶 ∈ On ∧ 𝑦 ∈ On) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦) ↔ (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
4241adantr 480 . . . . . . . . . . . . . 14 (((𝐶 ∈ On ∧ 𝑦 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → ((𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦) ↔ (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝑦) +𝑜 𝐶)))
4339, 42sylibrd 248 . . . . . . . . . . . . 13 (((𝐶 ∈ On ∧ 𝑦 ∈ On) ∧ (∅ ∈ 𝐶 ∧ (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)))) → (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦)))
4443exp43 638 . . . . . . . . . . . 12 (𝐶 ∈ On → (𝑦 ∈ On → (∅ ∈ 𝐶 → ((𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)) → (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦))))))
4544com12 32 . . . . . . . . . . 11 (𝑦 ∈ On → (𝐶 ∈ On → (∅ ∈ 𝐶 → ((𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)) → (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦))))))
4645adantld 482 . . . . . . . . . 10 (𝑦 ∈ On → ((𝐴 ∈ On ∧ 𝐶 ∈ On) → (∅ ∈ 𝐶 → ((𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)) → (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦))))))
4746impd 446 . . . . . . . . 9 (𝑦 ∈ On → (((𝐴 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → ((𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)) → (𝐴 ∈ suc 𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝑦)))))
48 id 22 . . . . . . . . . . . . . . . 16 ((𝐶 ∈ On ∧ Lim 𝑥) → (𝐶 ∈ On ∧ Lim 𝑥))
4948ad2ant2r 779 . . . . . . . . . . . . . . 15 (((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ (Lim 𝑥 ∧ ∅ ∈ 𝐶)) → (𝐶 ∈ On ∧ Lim 𝑥))
50 limsuc 6941 . . . . . . . . . . . . . . . . . . 19 (Lim 𝑥 → (𝐴𝑥 ↔ suc 𝐴𝑥))
5150biimpa 500 . . . . . . . . . . . . . . . . . 18 ((Lim 𝑥𝐴𝑥) → suc 𝐴𝑥)
52 oveq2 6557 . . . . . . . . . . . . . . . . . . 19 (𝑦 = suc 𝐴 → (𝐶 ·𝑜 𝑦) = (𝐶 ·𝑜 suc 𝐴))
5352ssiun2s 4500 . . . . . . . . . . . . . . . . . 18 (suc 𝐴𝑥 → (𝐶 ·𝑜 suc 𝐴) ⊆ 𝑦𝑥 (𝐶 ·𝑜 𝑦))
5451, 53syl 17 . . . . . . . . . . . . . . . . 17 ((Lim 𝑥𝐴𝑥) → (𝐶 ·𝑜 suc 𝐴) ⊆ 𝑦𝑥 (𝐶 ·𝑜 𝑦))
5554adantll 746 . . . . . . . . . . . . . . . 16 (((𝐶 ∈ On ∧ Lim 𝑥) ∧ 𝐴𝑥) → (𝐶 ·𝑜 suc 𝐴) ⊆ 𝑦𝑥 (𝐶 ·𝑜 𝑦))
56 vex 3176 . . . . . . . . . . . . . . . . . 18 𝑥 ∈ V
57 omlim 7500 . . . . . . . . . . . . . . . . . 18 ((𝐶 ∈ On ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → (𝐶 ·𝑜 𝑥) = 𝑦𝑥 (𝐶 ·𝑜 𝑦))
5856, 57mpanr1 715 . . . . . . . . . . . . . . . . 17 ((𝐶 ∈ On ∧ Lim 𝑥) → (𝐶 ·𝑜 𝑥) = 𝑦𝑥 (𝐶 ·𝑜 𝑦))
5958adantr 480 . . . . . . . . . . . . . . . 16 (((𝐶 ∈ On ∧ Lim 𝑥) ∧ 𝐴𝑥) → (𝐶 ·𝑜 𝑥) = 𝑦𝑥 (𝐶 ·𝑜 𝑦))
6055, 59sseqtr4d 3605 . . . . . . . . . . . . . . 15 (((𝐶 ∈ On ∧ Lim 𝑥) ∧ 𝐴𝑥) → (𝐶 ·𝑜 suc 𝐴) ⊆ (𝐶 ·𝑜 𝑥))
6149, 60sylan 487 . . . . . . . . . . . . . 14 ((((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ (Lim 𝑥 ∧ ∅ ∈ 𝐶)) ∧ 𝐴𝑥) → (𝐶 ·𝑜 suc 𝐴) ⊆ (𝐶 ·𝑜 𝑥))
62 omcl 7503 . . . . . . . . . . . . . . . . . . . 20 ((𝐶 ∈ On ∧ 𝐴 ∈ On) → (𝐶 ·𝑜 𝐴) ∈ On)
63 oaord1 7518 . . . . . . . . . . . . . . . . . . . 20 (((𝐶 ·𝑜 𝐴) ∈ On ∧ 𝐶 ∈ On) → (∅ ∈ 𝐶 ↔ (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝐴) +𝑜 𝐶)))
6462, 63sylan 487 . . . . . . . . . . . . . . . . . . 19 (((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ 𝐶 ∈ On) → (∅ ∈ 𝐶 ↔ (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝐴) +𝑜 𝐶)))
6564anabss1 851 . . . . . . . . . . . . . . . . . 18 ((𝐶 ∈ On ∧ 𝐴 ∈ On) → (∅ ∈ 𝐶 ↔ (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝐴) +𝑜 𝐶)))
6665biimpa 500 . . . . . . . . . . . . . . . . 17 (((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐴) ∈ ((𝐶 ·𝑜 𝐴) +𝑜 𝐶))
67 omsuc 7493 . . . . . . . . . . . . . . . . . 18 ((𝐶 ∈ On ∧ 𝐴 ∈ On) → (𝐶 ·𝑜 suc 𝐴) = ((𝐶 ·𝑜 𝐴) +𝑜 𝐶))
6867adantr 480 . . . . . . . . . . . . . . . . 17 (((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 suc 𝐴) = ((𝐶 ·𝑜 𝐴) +𝑜 𝐶))
6966, 68eleqtrrd 2691 . . . . . . . . . . . . . . . 16 (((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝐴))
7069adantrl 748 . . . . . . . . . . . . . . 15 (((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ (Lim 𝑥 ∧ ∅ ∈ 𝐶)) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝐴))
7170adantr 480 . . . . . . . . . . . . . 14 ((((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ (Lim 𝑥 ∧ ∅ ∈ 𝐶)) ∧ 𝐴𝑥) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 suc 𝐴))
7261, 71sseldd 3569 . . . . . . . . . . . . 13 ((((𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ (Lim 𝑥 ∧ ∅ ∈ 𝐶)) ∧ 𝐴𝑥) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥))
7372exp53 645 . . . . . . . . . . . 12 (𝐶 ∈ On → (𝐴 ∈ On → (Lim 𝑥 → (∅ ∈ 𝐶 → (𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥))))))
7473com13 86 . . . . . . . . . . 11 (Lim 𝑥 → (𝐴 ∈ On → (𝐶 ∈ On → (∅ ∈ 𝐶 → (𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥))))))
7574imp4c 615 . . . . . . . . . 10 (Lim 𝑥 → (((𝐴 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥))))
7675a1dd 48 . . . . . . . . 9 (Lim 𝑥 → (((𝐴 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (∀𝑦𝑥 (𝐴𝑦 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑦)) → (𝐴𝑥 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝑥)))))
776, 10, 14, 18, 21, 47, 76tfinds3 6956 . . . . . . . 8 (𝐵 ∈ On → (((𝐴 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵))))
7877com23 84 . . . . . . 7 (𝐵 ∈ On → (𝐴𝐵 → (((𝐴 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵))))
7978exp4a 631 . . . . . 6 (𝐵 ∈ On → (𝐴𝐵 → ((𝐴 ∈ On ∧ 𝐶 ∈ On) → (∅ ∈ 𝐶 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))))
8079exp4a 631 . . . . 5 (𝐵 ∈ On → (𝐴𝐵 → (𝐴 ∈ On → (𝐶 ∈ On → (∅ ∈ 𝐶 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵))))))
812, 80mpdd 42 . . . 4 (𝐵 ∈ On → (𝐴𝐵 → (𝐶 ∈ On → (∅ ∈ 𝐶 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))))
8281com34 89 . . 3 (𝐵 ∈ On → (𝐴𝐵 → (∅ ∈ 𝐶 → (𝐶 ∈ On → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))))
8382com24 93 . 2 (𝐵 ∈ On → (𝐶 ∈ On → (∅ ∈ 𝐶 → (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))))
8483imp31 447 1 (((𝐵 ∈ On ∧ 𝐶 ∈ On) ∧ ∅ ∈ 𝐶) → (𝐴𝐵 → (𝐶 ·𝑜 𝐴) ∈ (𝐶 ·𝑜 𝐵)))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 195   ∨ wo 382   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ∀wral 2896  Vcvv 3173   ⊆ wss 3540  ∅c0 3874  ∪ ciun 4455  Oncon0 5640  Lim wlim 5641  suc csuc 5642  (class class class)co 6549   +𝑜 coa 7444   ·𝑜 comu 7445 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-oadd 7451  df-omul 7452 This theorem is referenced by:  omord2  7534  omcan  7536  odi  7546  omass  7547  oen0  7553  oeordi  7554  oeordsuc  7561
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