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Theorem omeu 7906
Description: The division algorithm for ordinal multiplication. (Contributed by Mario Carneiro, 28-Feb-2013.)
Assertion
Ref Expression
omeu ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ∃!𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
Distinct variable groups:   𝑥,𝐴,𝑦,𝑧   𝑥,𝐵,𝑦,𝑧

Proof of Theorem omeu
Dummy variables 𝑟 𝑠 𝑡 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 omeulem1 7903 . . 3 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ∃𝑥 ∈ On ∃𝑦𝐴 ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)
2 opex 5124 . . . . . . . . 9 𝑥, 𝑦⟩ ∈ V
32isseti 3398 . . . . . . . 8 𝑧 𝑧 = ⟨𝑥, 𝑦
4 19.41v 2045 . . . . . . . 8 (∃𝑧(𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ (∃𝑧 𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
53, 4mpbiran 701 . . . . . . 7 (∃𝑧(𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)
65rexbii 3223 . . . . . 6 (∃𝑦𝐴𝑧(𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ ∃𝑦𝐴 ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)
7 rexcom4 3414 . . . . . 6 (∃𝑦𝐴𝑧(𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ ∃𝑧𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
86, 7bitr3i 269 . . . . 5 (∃𝑦𝐴 ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵 ↔ ∃𝑧𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
98rexbii 3223 . . . 4 (∃𝑥 ∈ On ∃𝑦𝐴 ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵 ↔ ∃𝑥 ∈ On ∃𝑧𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
10 rexcom4 3414 . . . 4 (∃𝑥 ∈ On ∃𝑧𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ ∃𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
119, 10bitri 267 . . 3 (∃𝑥 ∈ On ∃𝑦𝐴 ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵 ↔ ∃𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
121, 11sylib 210 . 2 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ∃𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
13 simp2rl 1324 . . . . . . . . . . 11 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑧 = ⟨𝑥, 𝑦⟩)
14 simp3rl 1328 . . . . . . . . . . . 12 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑡 = ⟨𝑟, 𝑠⟩)
15 simp2rr 1325 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)
16 simp3rr 1329 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)
1715, 16eqtr4d 2837 . . . . . . . . . . . . . 14 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = ((𝐴 ·𝑜 𝑟) +𝑜 𝑠))
18 simp11 1261 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝐴 ∈ On)
19 simp13 1263 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝐴 ≠ ∅)
20 simp2ll 1322 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑥 ∈ On)
21 simp2lr 1323 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑦𝐴)
22 simp3ll 1326 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑟 ∈ On)
23 simp3lr 1327 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑠𝐴)
24 omopth2 7905 . . . . . . . . . . . . . . 15 (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑟 ∈ On ∧ 𝑠𝐴)) → (((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) ↔ (𝑥 = 𝑟𝑦 = 𝑠)))
2518, 19, 20, 21, 22, 23, 24syl222anc 1506 . . . . . . . . . . . . . 14 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → (((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) ↔ (𝑥 = 𝑟𝑦 = 𝑠)))
2617, 25mpbid 224 . . . . . . . . . . . . 13 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → (𝑥 = 𝑟𝑦 = 𝑠))
27 opeq12 4596 . . . . . . . . . . . . 13 ((𝑥 = 𝑟𝑦 = 𝑠) → ⟨𝑥, 𝑦⟩ = ⟨𝑟, 𝑠⟩)
2826, 27syl 17 . . . . . . . . . . . 12 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → ⟨𝑥, 𝑦⟩ = ⟨𝑟, 𝑠⟩)
2914, 28eqtr4d 2837 . . . . . . . . . . 11 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑡 = ⟨𝑥, 𝑦⟩)
3013, 29eqtr4d 2837 . . . . . . . . . 10 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) ∧ ((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))) → 𝑧 = 𝑡)
31303expia 1151 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))) → (((𝑟 ∈ On ∧ 𝑠𝐴) ∧ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)) → 𝑧 = 𝑡))
3231exp4b 422 . . . . . . . 8 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → (((𝑥 ∈ On ∧ 𝑦𝐴) ∧ (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) → ((𝑟 ∈ On ∧ 𝑠𝐴) → ((𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) → 𝑧 = 𝑡))))
3332expd 405 . . . . . . 7 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ((𝑥 ∈ On ∧ 𝑦𝐴) → ((𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) → ((𝑟 ∈ On ∧ 𝑠𝐴) → ((𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) → 𝑧 = 𝑡)))))
3433rexlimdvv 3219 . . . . . 6 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → (∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) → ((𝑟 ∈ On ∧ 𝑠𝐴) → ((𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) → 𝑧 = 𝑡))))
3534imp 396 . . . . 5 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) → ((𝑟 ∈ On ∧ 𝑠𝐴) → ((𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) → 𝑧 = 𝑡)))
3635rexlimdvv 3219 . . . 4 (((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) ∧ ∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵)) → (∃𝑟 ∈ On ∃𝑠𝐴 (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) → 𝑧 = 𝑡))
3736expimpd 446 . . 3 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ((∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ∧ ∃𝑟 ∈ On ∃𝑠𝐴 (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)) → 𝑧 = 𝑡))
3837alrimivv 2024 . 2 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ∀𝑧𝑡((∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ∧ ∃𝑟 ∈ On ∃𝑠𝐴 (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)) → 𝑧 = 𝑡))
39 opeq1 4594 . . . . . . 7 (𝑥 = 𝑟 → ⟨𝑥, 𝑦⟩ = ⟨𝑟, 𝑦⟩)
4039eqeq2d 2810 . . . . . 6 (𝑥 = 𝑟 → (𝑧 = ⟨𝑥, 𝑦⟩ ↔ 𝑧 = ⟨𝑟, 𝑦⟩))
41 oveq2 6887 . . . . . . . 8 (𝑥 = 𝑟 → (𝐴 ·𝑜 𝑥) = (𝐴 ·𝑜 𝑟))
4241oveq1d 6894 . . . . . . 7 (𝑥 = 𝑟 → ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = ((𝐴 ·𝑜 𝑟) +𝑜 𝑦))
4342eqeq1d 2802 . . . . . 6 (𝑥 = 𝑟 → (((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵 ↔ ((𝐴 ·𝑜 𝑟) +𝑜 𝑦) = 𝐵))
4440, 43anbi12d 625 . . . . 5 (𝑥 = 𝑟 → ((𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ (𝑧 = ⟨𝑟, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑦) = 𝐵)))
45 opeq2 4595 . . . . . . 7 (𝑦 = 𝑠 → ⟨𝑟, 𝑦⟩ = ⟨𝑟, 𝑠⟩)
4645eqeq2d 2810 . . . . . 6 (𝑦 = 𝑠 → (𝑧 = ⟨𝑟, 𝑦⟩ ↔ 𝑧 = ⟨𝑟, 𝑠⟩))
47 oveq2 6887 . . . . . . 7 (𝑦 = 𝑠 → ((𝐴 ·𝑜 𝑟) +𝑜 𝑦) = ((𝐴 ·𝑜 𝑟) +𝑜 𝑠))
4847eqeq1d 2802 . . . . . 6 (𝑦 = 𝑠 → (((𝐴 ·𝑜 𝑟) +𝑜 𝑦) = 𝐵 ↔ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))
4946, 48anbi12d 625 . . . . 5 (𝑦 = 𝑠 → ((𝑧 = ⟨𝑟, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑦) = 𝐵) ↔ (𝑧 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)))
5044, 49cbvrex2v 3364 . . . 4 (∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ ∃𝑟 ∈ On ∃𝑠𝐴 (𝑧 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵))
51 eqeq1 2804 . . . . . 6 (𝑧 = 𝑡 → (𝑧 = ⟨𝑟, 𝑠⟩ ↔ 𝑡 = ⟨𝑟, 𝑠⟩))
5251anbi1d 624 . . . . 5 (𝑧 = 𝑡 → ((𝑧 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) ↔ (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)))
53522rexbidv 3239 . . . 4 (𝑧 = 𝑡 → (∃𝑟 ∈ On ∃𝑠𝐴 (𝑧 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵) ↔ ∃𝑟 ∈ On ∃𝑠𝐴 (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)))
5450, 53syl5bb 275 . . 3 (𝑧 = 𝑡 → (∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ ∃𝑟 ∈ On ∃𝑠𝐴 (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)))
5554eu4 2673 . 2 (∃!𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ↔ (∃𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ∧ ∀𝑧𝑡((∃𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵) ∧ ∃𝑟 ∈ On ∃𝑠𝐴 (𝑡 = ⟨𝑟, 𝑠⟩ ∧ ((𝐴 ·𝑜 𝑟) +𝑜 𝑠) = 𝐵)) → 𝑧 = 𝑡)))
5612, 38, 55sylanbrc 579 1 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐴 ≠ ∅) → ∃!𝑧𝑥 ∈ On ∃𝑦𝐴 (𝑧 = ⟨𝑥, 𝑦⟩ ∧ ((𝐴 ·𝑜 𝑥) +𝑜 𝑦) = 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 198  wa 385  w3a 1108  wal 1651   = wceq 1653  wex 1875  wcel 2157  ∃!weu 2609  wne 2972  wrex 3091  c0 4116  cop 4375  Oncon0 5942  (class class class)co 6879   +𝑜 coa 7797   ·𝑜 comu 7798
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2378  ax-ext 2778  ax-rep 4965  ax-sep 4976  ax-nul 4984  ax-pow 5036  ax-pr 5098  ax-un 7184
This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3or 1109  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2592  df-eu 2610  df-clab 2787  df-cleq 2793  df-clel 2796  df-nfc 2931  df-ne 2973  df-ral 3095  df-rex 3096  df-reu 3097  df-rmo 3098  df-rab 3099  df-v 3388  df-sbc 3635  df-csb 3730  df-dif 3773  df-un 3775  df-in 3777  df-ss 3784  df-pss 3786  df-nul 4117  df-if 4279  df-pw 4352  df-sn 4370  df-pr 4372  df-tp 4374  df-op 4376  df-uni 4630  df-int 4669  df-iun 4713  df-br 4845  df-opab 4907  df-mpt 4924  df-tr 4947  df-id 5221  df-eprel 5226  df-po 5234  df-so 5235  df-fr 5272  df-we 5274  df-xp 5319  df-rel 5320  df-cnv 5321  df-co 5322  df-dm 5323  df-rn 5324  df-res 5325  df-ima 5326  df-pred 5899  df-ord 5945  df-on 5946  df-lim 5947  df-suc 5948  df-iota 6065  df-fun 6104  df-fn 6105  df-f 6106  df-f1 6107  df-fo 6108  df-f1o 6109  df-fv 6110  df-ov 6882  df-oprab 6883  df-mpt2 6884  df-om 7301  df-wrecs 7646  df-recs 7708  df-rdg 7746  df-1o 7800  df-oadd 7804  df-omul 7805
This theorem is referenced by:  oeeui  7923  omxpenlem  8304
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