Theorem omopth2 8415

Description: An ordered pair-like theorem for ordinal multiplication. (Contributed by Mario Carneiro, 29-May-2015.)

Assertion

Ref	Expression
omopth2	⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) → (((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸) ↔ (𝐵 = 𝐷 ∧ 𝐶 = 𝐸)))

Proof of Theorem omopth2

Step	Hyp	Ref	Expression
1		simpl2l 1225	. . . . . . 7 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐵 ∈ On)
2		eloni 6276	. . . . . . 7 ⊢ (𝐵 ∈ On → Ord 𝐵)
3	1, 2	syl 17	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → Ord 𝐵)
4		simpl3l 1227	. . . . . . 7 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐷 ∈ On)
5		eloni 6276	. . . . . . 7 ⊢ (𝐷 ∈ On → Ord 𝐷)
6	4, 5	syl 17	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → Ord 𝐷)
7		ordtri3or 6298	. . . . . 6 ⊢ ((Ord 𝐵 ∧ Ord 𝐷) → (𝐵 ∈ 𝐷 ∨ 𝐵 = 𝐷 ∨ 𝐷 ∈ 𝐵))
8	3, 6, 7	syl2anc 584	. . . . 5 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐵 ∈ 𝐷 ∨ 𝐵 = 𝐷 ∨ 𝐷 ∈ 𝐵))
9		simpr 485	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸))
10		simpl1l 1223	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐴 ∈ On)
11		omcl 8366	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ On ∧ 𝐷 ∈ On) → (𝐴 ·o 𝐷) ∈ On)
12	10, 4, 11	syl2anc 584	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐴 ·o 𝐷) ∈ On)
13		simpl3r 1228	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐸 ∈ 𝐴)
14		onelon 6291	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ On ∧ 𝐸 ∈ 𝐴) → 𝐸 ∈ On)
15	10, 13, 14	syl2anc 584	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐸 ∈ On)
16		oacl 8365	. . . . . . . . . . 11 ⊢ (((𝐴 ·o 𝐷) ∈ On ∧ 𝐸 ∈ On) → ((𝐴 ·o 𝐷) +o 𝐸) ∈ On)
17	12, 15, 16	syl2anc 584	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐴 ·o 𝐷) +o 𝐸) ∈ On)
18		eloni 6276	. . . . . . . . . 10 ⊢ (((𝐴 ·o 𝐷) +o 𝐸) ∈ On → Ord ((𝐴 ·o 𝐷) +o 𝐸))
19		ordirr 6284	. . . . . . . . . 10 ⊢ (Ord ((𝐴 ·o 𝐷) +o 𝐸) → ¬ ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐷) +o 𝐸))
20	17, 18, 19	3syl 18	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐷) +o 𝐸))
21	9, 20	eqneltrd 2858	. . . . . . . 8 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ ((𝐴 ·o 𝐵) +o 𝐶) ∈ ((𝐴 ·o 𝐷) +o 𝐸))
22		orc 864	. . . . . . . . 9 ⊢ (𝐵 ∈ 𝐷 → (𝐵 ∈ 𝐷 ∨ (𝐵 = 𝐷 ∧ 𝐶 ∈ 𝐸)))
23		omeulem2 8414	. . . . . . . . . 10 ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) → ((𝐵 ∈ 𝐷 ∨ (𝐵 = 𝐷 ∧ 𝐶 ∈ 𝐸)) → ((𝐴 ·o 𝐵) +o 𝐶) ∈ ((𝐴 ·o 𝐷) +o 𝐸)))
24	23	adantr 481	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐵 ∈ 𝐷 ∨ (𝐵 = 𝐷 ∧ 𝐶 ∈ 𝐸)) → ((𝐴 ·o 𝐵) +o 𝐶) ∈ ((𝐴 ·o 𝐷) +o 𝐸)))
25	22, 24	syl5 34	. . . . . . . 8 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐵 ∈ 𝐷 → ((𝐴 ·o 𝐵) +o 𝐶) ∈ ((𝐴 ·o 𝐷) +o 𝐸)))
26	21, 25	mtod 197	. . . . . . 7 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ 𝐵 ∈ 𝐷)
27	26	pm2.21d 121	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐵 ∈ 𝐷 → 𝐵 = 𝐷))
28		idd 24	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐵 = 𝐷 → 𝐵 = 𝐷))
29	20, 9	neleqtrrd 2861	. . . . . . . 8 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐵) +o 𝐶))
30		orc 864	. . . . . . . . 9 ⊢ (𝐷 ∈ 𝐵 → (𝐷 ∈ 𝐵 ∨ (𝐷 = 𝐵 ∧ 𝐸 ∈ 𝐶)))
31		simpl1r 1224	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐴 ≠ ∅)
32		simpl2r 1226	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐶 ∈ 𝐴)
33		omeulem2 8414	. . . . . . . . . 10 ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴)) → ((𝐷 ∈ 𝐵 ∨ (𝐷 = 𝐵 ∧ 𝐸 ∈ 𝐶)) → ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐵) +o 𝐶)))
34	10, 31, 4, 13, 1, 32, 33	syl222anc 1385	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐷 ∈ 𝐵 ∨ (𝐷 = 𝐵 ∧ 𝐸 ∈ 𝐶)) → ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐵) +o 𝐶)))
35	30, 34	syl5 34	. . . . . . . 8 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐷 ∈ 𝐵 → ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐵) +o 𝐶)))
36	29, 35	mtod 197	. . . . . . 7 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ 𝐷 ∈ 𝐵)
37	36	pm2.21d 121	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐷 ∈ 𝐵 → 𝐵 = 𝐷))
38	27, 28, 37	3jaod 1427	. . . . 5 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐵 ∈ 𝐷 ∨ 𝐵 = 𝐷 ∨ 𝐷 ∈ 𝐵) → 𝐵 = 𝐷))
39	8, 38	mpd 15	. . . 4 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐵 = 𝐷)
40		onelon 6291	. . . . . . . 8 ⊢ ((𝐴 ∈ On ∧ 𝐶 ∈ 𝐴) → 𝐶 ∈ On)
41		eloni 6276	. . . . . . . 8 ⊢ (𝐶 ∈ On → Ord 𝐶)
42	40, 41	syl 17	. . . . . . 7 ⊢ ((𝐴 ∈ On ∧ 𝐶 ∈ 𝐴) → Ord 𝐶)
43	10, 32, 42	syl2anc 584	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → Ord 𝐶)
44		eloni 6276	. . . . . . . 8 ⊢ (𝐸 ∈ On → Ord 𝐸)
45	14, 44	syl 17	. . . . . . 7 ⊢ ((𝐴 ∈ On ∧ 𝐸 ∈ 𝐴) → Ord 𝐸)
46	10, 13, 45	syl2anc 584	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → Ord 𝐸)
47		ordtri3or 6298	. . . . . 6 ⊢ ((Ord 𝐶 ∧ Ord 𝐸) → (𝐶 ∈ 𝐸 ∨ 𝐶 = 𝐸 ∨ 𝐸 ∈ 𝐶))
48	43, 46, 47	syl2anc 584	. . . . 5 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐶 ∈ 𝐸 ∨ 𝐶 = 𝐸 ∨ 𝐸 ∈ 𝐶))
49		olc 865	. . . . . . . . . 10 ⊢ ((𝐵 = 𝐷 ∧ 𝐶 ∈ 𝐸) → (𝐵 ∈ 𝐷 ∨ (𝐵 = 𝐷 ∧ 𝐶 ∈ 𝐸)))
50	49, 24	syl5 34	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐵 = 𝐷 ∧ 𝐶 ∈ 𝐸) → ((𝐴 ·o 𝐵) +o 𝐶) ∈ ((𝐴 ·o 𝐷) +o 𝐸)))
51	39, 50	mpand 692	. . . . . . . 8 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐶 ∈ 𝐸 → ((𝐴 ·o 𝐵) +o 𝐶) ∈ ((𝐴 ·o 𝐷) +o 𝐸)))
52	21, 51	mtod 197	. . . . . . 7 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ 𝐶 ∈ 𝐸)
53	52	pm2.21d 121	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐶 ∈ 𝐸 → 𝐶 = 𝐸))
54		idd 24	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐶 = 𝐸 → 𝐶 = 𝐸))
55	39	eqcomd 2744	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐷 = 𝐵)
56		olc 865	. . . . . . . . . 10 ⊢ ((𝐷 = 𝐵 ∧ 𝐸 ∈ 𝐶) → (𝐷 ∈ 𝐵 ∨ (𝐷 = 𝐵 ∧ 𝐸 ∈ 𝐶)))
57	56, 34	syl5 34	. . . . . . . . 9 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐷 = 𝐵 ∧ 𝐸 ∈ 𝐶) → ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐵) +o 𝐶)))
58	55, 57	mpand 692	. . . . . . . 8 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐸 ∈ 𝐶 → ((𝐴 ·o 𝐷) +o 𝐸) ∈ ((𝐴 ·o 𝐵) +o 𝐶)))
59	29, 58	mtod 197	. . . . . . 7 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ¬ 𝐸 ∈ 𝐶)
60	59	pm2.21d 121	. . . . . 6 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐸 ∈ 𝐶 → 𝐶 = 𝐸))
61	53, 54, 60	3jaod 1427	. . . . 5 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → ((𝐶 ∈ 𝐸 ∨ 𝐶 = 𝐸 ∨ 𝐸 ∈ 𝐶) → 𝐶 = 𝐸))
62	48, 61	mpd 15	. . . 4 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → 𝐶 = 𝐸)
63	39, 62	jca 512	. . 3 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) ∧ ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸)) → (𝐵 = 𝐷 ∧ 𝐶 = 𝐸))
64	63	ex 413	. 2 ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) → (((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸) → (𝐵 = 𝐷 ∧ 𝐶 = 𝐸)))
65		oveq2 7283	. . 3 ⊢ (𝐵 = 𝐷 → (𝐴 ·o 𝐵) = (𝐴 ·o 𝐷))
66		id 22	. . 3 ⊢ (𝐶 = 𝐸 → 𝐶 = 𝐸)
67	65, 66	oveqan12d 7294	. 2 ⊢ ((𝐵 = 𝐷 ∧ 𝐶 = 𝐸) → ((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸))
68	64, 67	impbid1 224	1 ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (𝐵 ∈ On ∧ 𝐶 ∈ 𝐴) ∧ (𝐷 ∈ On ∧ 𝐸 ∈ 𝐴)) → (((𝐴 ·o 𝐵) +o 𝐶) = ((𝐴 ·o 𝐷) +o 𝐸) ↔ (𝐵 = 𝐷 ∧ 𝐶 = 𝐸)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 205   ∧ wa 396   ∨ wo 844   ∨ w3o 1085   ∧ w3a 1086   = wceq 1539   ∈ wcel 2106   ≠ wne 2943  ∅c0 4256  Ord word 6265  Oncon0 6266  (class class class)co 7275   +_o coa 8294   ·_o comu 8295

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-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-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-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-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-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-2nd 7832  df-frecs 8097  df-wrecs 8128  df-recs 8202  df-rdg 8241  df-oadd 8301  df-omul 8302

This theorem is referenced by:  omeu  8416  dfac12lem2  9900