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Theorem wemapsolem 9008

Description: Lemma for wemapso 9009. (Contributed by Stefan O'Rear, 18-Jan-2015.) (Revised by Mario Carneiro, 8-Feb-2015.)

**Hypotheses**
Ref	Expression
wemapso.t	⊢ 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧 ∈ 𝐴 ((𝑥‘𝑧)𝑆(𝑦‘𝑧) ∧ ∀𝑤 ∈ 𝐴 (𝑤𝑅𝑧 → (𝑥‘𝑤) = (𝑦‘𝑤)))}
wemapsolem.1	⊢ 𝑈 ⊆ (𝐵 ↑_m 𝐴)
wemapsolem.2	⊢ (𝜑 → 𝐴 ∈ V)
wemapsolem.3	⊢ (𝜑 → 𝑅 Or 𝐴)
wemapsolem.4	⊢ (𝜑 → 𝑆 Or 𝐵)
wemapsolem.5	⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ∃𝑐 ∈ dom (𝑎 ∖ 𝑏)∀𝑑 ∈ dom (𝑎 ∖ 𝑏) ¬ 𝑑𝑅𝑐)

**Assertion**
Ref	Expression
wemapsolem	⊢ (𝜑 → 𝑇 Or 𝑈)

Distinct variable groups: 𝑎,𝑏,𝑐,𝑑,𝑥,𝐵 𝑇,𝑎,𝑏,𝑐,𝑑 𝑈,𝑎,𝑏,𝑐,𝑑 𝑤,𝑎,𝑦,𝑧,𝑏,𝑐,𝑥,𝐴,𝑑 𝑅,𝑎,𝑏,𝑐,𝑑,𝑤,𝑥,𝑦,𝑧 𝑆,𝑎,𝑏,𝑐,𝑑,𝑤,𝑥,𝑦,𝑧 𝜑,𝑎,𝑏,𝑐,𝑑 Allowed substitution hints: 𝜑(𝑥,𝑦,𝑧,𝑤) 𝐵(𝑦,𝑧,𝑤) 𝑇(𝑥,𝑦,𝑧,𝑤) 𝑈(𝑥,𝑦,𝑧,𝑤)

**Proof of Theorem wemapsolem**
Step	Hyp	Ref	Expression
1		wemapsolem.1	. . 3 ⊢ 𝑈 ⊆ (𝐵 ↑_m 𝐴)
2		wemapsolem.2	. . . 4 ⊢ (𝜑 → 𝐴 ∈ V)
3		wemapsolem.3	. . . 4 ⊢ (𝜑 → 𝑅 Or 𝐴)
4		wemapsolem.4	. . . . 5 ⊢ (𝜑 → 𝑆 Or 𝐵)
5		sopo 5486	. . . . 5 ⊢ (𝑆 Or 𝐵 → 𝑆 Po 𝐵)
6	4, 5	syl 17	. . . 4 ⊢ (𝜑 → 𝑆 Po 𝐵)
7		wemapso.t	. . . . 5 ⊢ 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧 ∈ 𝐴 ((𝑥‘𝑧)𝑆(𝑦‘𝑧) ∧ ∀𝑤 ∈ 𝐴 (𝑤𝑅𝑧 → (𝑥‘𝑤) = (𝑦‘𝑤)))}
8	7	wemappo 9007	. . . 4 ⊢ ((𝐴 ∈ V ∧ 𝑅 Or 𝐴 ∧ 𝑆 Po 𝐵) → 𝑇 Po (𝐵 ↑_m 𝐴))
9	2, 3, 6, 8	syl3anc 1367	. . 3 ⊢ (𝜑 → 𝑇 Po (𝐵 ↑_m 𝐴))
10		poss 5470	. . 3 ⊢ (𝑈 ⊆ (𝐵 ↑_m 𝐴) → (𝑇 Po (𝐵 ↑_m 𝐴) → 𝑇 Po 𝑈))
11	1, 9, 10	mpsyl 68	. 2 ⊢ (𝜑 → 𝑇 Po 𝑈)
12		df-ne 3017	. . . . 5 ⊢ (𝑎 ≠ 𝑏 ↔ ¬ 𝑎 = 𝑏)
13		wemapsolem.5	. . . . . . . . 9 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ∃𝑐 ∈ dom (𝑎 ∖ 𝑏)∀𝑑 ∈ dom (𝑎 ∖ 𝑏) ¬ 𝑑𝑅𝑐)
14		simprll 777	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑎 ∈ 𝑈)
15	1, 14	sseldi 3964	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑎 ∈ (𝐵 ↑_m 𝐴))
16		elmapi 8422	. . . . . . . . . . . . . . . . 17 ⊢ (𝑎 ∈ (𝐵 ↑_m 𝐴) → 𝑎:𝐴⟶𝐵)
17	15, 16	syl 17	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑎:𝐴⟶𝐵)
18	17	ffnd 6509	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑎 Fn 𝐴)
19		simprlr 778	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑏 ∈ 𝑈)
20	1, 19	sseldi 3964	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑏 ∈ (𝐵 ↑_m 𝐴))
21		elmapi 8422	. . . . . . . . . . . . . . . . 17 ⊢ (𝑏 ∈ (𝐵 ↑_m 𝐴) → 𝑏:𝐴⟶𝐵)
22	20, 21	syl 17	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑏:𝐴⟶𝐵)
23	22	ffnd 6509	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → 𝑏 Fn 𝐴)
24		fndmdif 6806	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 Fn 𝐴 ∧ 𝑏 Fn 𝐴) → dom (𝑎 ∖ 𝑏) = {𝑥 ∈ 𝐴 ∣ (𝑎‘𝑥) ≠ (𝑏‘𝑥)})
25	18, 23, 24	syl2anc 586	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → dom (𝑎 ∖ 𝑏) = {𝑥 ∈ 𝐴 ∣ (𝑎‘𝑥) ≠ (𝑏‘𝑥)})
26	25	eleq2d 2898	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (𝑐 ∈ dom (𝑎 ∖ 𝑏) ↔ 𝑐 ∈ {𝑥 ∈ 𝐴 ∣ (𝑎‘𝑥) ≠ (𝑏‘𝑥)}))
27		nesym 3072	. . . . . . . . . . . . . . 15 ⊢ ((𝑎‘𝑥) ≠ (𝑏‘𝑥) ↔ ¬ (𝑏‘𝑥) = (𝑎‘𝑥))
28		fveq2 6664	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑐 → (𝑏‘𝑥) = (𝑏‘𝑐))
29		fveq2 6664	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑐 → (𝑎‘𝑥) = (𝑎‘𝑐))
30	28, 29	eqeq12d 2837	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑐 → ((𝑏‘𝑥) = (𝑎‘𝑥) ↔ (𝑏‘𝑐) = (𝑎‘𝑐)))
31	30	notbid 320	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = 𝑐 → (¬ (𝑏‘𝑥) = (𝑎‘𝑥) ↔ ¬ (𝑏‘𝑐) = (𝑎‘𝑐)))
32	27, 31	syl5bb 285	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑐 → ((𝑎‘𝑥) ≠ (𝑏‘𝑥) ↔ ¬ (𝑏‘𝑐) = (𝑎‘𝑐)))
33	32	elrab 3679	. . . . . . . . . . . . 13 ⊢ (𝑐 ∈ {𝑥 ∈ 𝐴 ∣ (𝑎‘𝑥) ≠ (𝑏‘𝑥)} ↔ (𝑐 ∈ 𝐴 ∧ ¬ (𝑏‘𝑐) = (𝑎‘𝑐)))
34	26, 33	syl6bb 289	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (𝑐 ∈ dom (𝑎 ∖ 𝑏) ↔ (𝑐 ∈ 𝐴 ∧ ¬ (𝑏‘𝑐) = (𝑎‘𝑐))))
35	25	eleq2d 2898	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (𝑑 ∈ dom (𝑎 ∖ 𝑏) ↔ 𝑑 ∈ {𝑥 ∈ 𝐴 ∣ (𝑎‘𝑥) ≠ (𝑏‘𝑥)}))
36		fveq2 6664	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 = 𝑑 → (𝑏‘𝑥) = (𝑏‘𝑑))
37		fveq2 6664	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 = 𝑑 → (𝑎‘𝑥) = (𝑎‘𝑑))
38	36, 37	eqeq12d 2837	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 = 𝑑 → ((𝑏‘𝑥) = (𝑎‘𝑥) ↔ (𝑏‘𝑑) = (𝑎‘𝑑)))
39	38	notbid 320	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = 𝑑 → (¬ (𝑏‘𝑥) = (𝑎‘𝑥) ↔ ¬ (𝑏‘𝑑) = (𝑎‘𝑑)))
40	27, 39	syl5bb 285	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑑 → ((𝑎‘𝑥) ≠ (𝑏‘𝑥) ↔ ¬ (𝑏‘𝑑) = (𝑎‘𝑑)))
41	40	elrab 3679	. . . . . . . . . . . . . . . 16 ⊢ (𝑑 ∈ {𝑥 ∈ 𝐴 ∣ (𝑎‘𝑥) ≠ (𝑏‘𝑥)} ↔ (𝑑 ∈ 𝐴 ∧ ¬ (𝑏‘𝑑) = (𝑎‘𝑑)))
42	35, 41	syl6bb 289	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (𝑑 ∈ dom (𝑎 ∖ 𝑏) ↔ (𝑑 ∈ 𝐴 ∧ ¬ (𝑏‘𝑑) = (𝑎‘𝑑))))
43	42	imbi1d 344	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ((𝑑 ∈ dom (𝑎 ∖ 𝑏) → ¬ 𝑑𝑅𝑐) ↔ ((𝑑 ∈ 𝐴 ∧ ¬ (𝑏‘𝑑) = (𝑎‘𝑑)) → ¬ 𝑑𝑅𝑐)))
44		impexp 453	. . . . . . . . . . . . . . 15 ⊢ (((𝑑 ∈ 𝐴 ∧ ¬ (𝑏‘𝑑) = (𝑎‘𝑑)) → ¬ 𝑑𝑅𝑐) ↔ (𝑑 ∈ 𝐴 → (¬ (𝑏‘𝑑) = (𝑎‘𝑑) → ¬ 𝑑𝑅𝑐)))
45		con34b 318	. . . . . . . . . . . . . . . 16 ⊢ ((𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)) ↔ (¬ (𝑏‘𝑑) = (𝑎‘𝑑) → ¬ 𝑑𝑅𝑐))
46	45	imbi2i 338	. . . . . . . . . . . . . . 15 ⊢ ((𝑑 ∈ 𝐴 → (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ↔ (𝑑 ∈ 𝐴 → (¬ (𝑏‘𝑑) = (𝑎‘𝑑) → ¬ 𝑑𝑅𝑐)))
47	44, 46	bitr4i 280	. . . . . . . . . . . . . 14 ⊢ (((𝑑 ∈ 𝐴 ∧ ¬ (𝑏‘𝑑) = (𝑎‘𝑑)) → ¬ 𝑑𝑅𝑐) ↔ (𝑑 ∈ 𝐴 → (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
48	43, 47	syl6bb 289	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ((𝑑 ∈ dom (𝑎 ∖ 𝑏) → ¬ 𝑑𝑅𝑐) ↔ (𝑑 ∈ 𝐴 → (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
49	48	ralbidv2 3195	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (∀𝑑 ∈ dom (𝑎 ∖ 𝑏) ¬ 𝑑𝑅𝑐 ↔ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
50	34, 49	anbi12d 632	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ((𝑐 ∈ dom (𝑎 ∖ 𝑏) ∧ ∀𝑑 ∈ dom (𝑎 ∖ 𝑏) ¬ 𝑑𝑅𝑐) ↔ ((𝑐 ∈ 𝐴 ∧ ¬ (𝑏‘𝑐) = (𝑎‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
51		anass 471	. . . . . . . . . . 11 ⊢ (((𝑐 ∈ 𝐴 ∧ ¬ (𝑏‘𝑐) = (𝑎‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ↔ (𝑐 ∈ 𝐴 ∧ (¬ (𝑏‘𝑐) = (𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
52	50, 51	syl6bb 289	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ((𝑐 ∈ dom (𝑎 ∖ 𝑏) ∧ ∀𝑑 ∈ dom (𝑎 ∖ 𝑏) ¬ 𝑑𝑅𝑐) ↔ (𝑐 ∈ 𝐴 ∧ (¬ (𝑏‘𝑐) = (𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))))
53	52	rexbidv2 3295	. . . . . . . . 9 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (∃𝑐 ∈ dom (𝑎 ∖ 𝑏)∀𝑑 ∈ dom (𝑎 ∖ 𝑏) ¬ 𝑑𝑅𝑐 ↔ ∃𝑐 ∈ 𝐴 (¬ (𝑏‘𝑐) = (𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
54	13, 53	mpbid 234	. . . . . . . 8 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ∃𝑐 ∈ 𝐴 (¬ (𝑏‘𝑐) = (𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
55	4	ad2antrr 724	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) ∧ 𝑐 ∈ 𝐴) → 𝑆 Or 𝐵)
56	22	ffvelrnda 6845	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) ∧ 𝑐 ∈ 𝐴) → (𝑏‘𝑐) ∈ 𝐵)
57	17	ffvelrnda 6845	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) ∧ 𝑐 ∈ 𝐴) → (𝑎‘𝑐) ∈ 𝐵)
58		sotrieq 5496	. . . . . . . . . . . . 13 ⊢ ((𝑆 Or 𝐵 ∧ ((𝑏‘𝑐) ∈ 𝐵 ∧ (𝑎‘𝑐) ∈ 𝐵)) → ((𝑏‘𝑐) = (𝑎‘𝑐) ↔ ¬ ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐))))
59	58	con2bid 357	. . . . . . . . . . . 12 ⊢ ((𝑆 Or 𝐵 ∧ ((𝑏‘𝑐) ∈ 𝐵 ∧ (𝑎‘𝑐) ∈ 𝐵)) → (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ↔ ¬ (𝑏‘𝑐) = (𝑎‘𝑐)))
60	59	biimprd 250	. . . . . . . . . . 11 ⊢ ((𝑆 Or 𝐵 ∧ ((𝑏‘𝑐) ∈ 𝐵 ∧ (𝑎‘𝑐) ∈ 𝐵)) → (¬ (𝑏‘𝑐) = (𝑎‘𝑐) → ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐))))
61	55, 56, 57, 60	syl12anc 834	. . . . . . . . . 10 ⊢ (((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) ∧ 𝑐 ∈ 𝐴) → (¬ (𝑏‘𝑐) = (𝑎‘𝑐) → ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐))))
62	61	anim1d 612	. . . . . . . . 9 ⊢ (((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) ∧ 𝑐 ∈ 𝐴) → ((¬ (𝑏‘𝑐) = (𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) → (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
63	62	reximdva 3274	. . . . . . . 8 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (∃𝑐 ∈ 𝐴 (¬ (𝑏‘𝑐) = (𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) → ∃𝑐 ∈ 𝐴 (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
64	54, 63	mpd 15	. . . . . . 7 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → ∃𝑐 ∈ 𝐴 (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
65	7	wemaplem1 9004	. . . . . . . . . 10 ⊢ ((𝑏 ∈ V ∧ 𝑎 ∈ V) → (𝑏𝑇𝑎 ↔ ∃𝑐 ∈ 𝐴 ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
66	65	el2v 3501	. . . . . . . . 9 ⊢ (𝑏𝑇𝑎 ↔ ∃𝑐 ∈ 𝐴 ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
67	7	wemaplem1 9004	. . . . . . . . . 10 ⊢ ((𝑎 ∈ V ∧ 𝑏 ∈ V) → (𝑎𝑇𝑏 ↔ ∃𝑐 ∈ 𝐴 ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))))
68	67	el2v 3501	. . . . . . . . 9 ⊢ (𝑎𝑇𝑏 ↔ ∃𝑐 ∈ 𝐴 ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑))))
69	66, 68	orbi12i 911	. . . . . . . 8 ⊢ ((𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏) ↔ (∃𝑐 ∈ 𝐴 ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ∃𝑐 ∈ 𝐴 ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))))
70		r19.43 3351	. . . . . . . 8 ⊢ (∃𝑐 ∈ 𝐴 (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))) ↔ (∃𝑐 ∈ 𝐴 ((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ∃𝑐 ∈ 𝐴 ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))))
71		andir 1005	. . . . . . . . . 10 ⊢ ((((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ↔ (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))))
72		eqcom 2828	. . . . . . . . . . . . . 14 ⊢ ((𝑏‘𝑑) = (𝑎‘𝑑) ↔ (𝑎‘𝑑) = (𝑏‘𝑑))
73	72	imbi2i 338	. . . . . . . . . . . . 13 ⊢ ((𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)) ↔ (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))
74	73	ralbii 3165	. . . . . . . . . . . 12 ⊢ (∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)) ↔ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))
75	74	anbi2i 624	. . . . . . . . . . 11 ⊢ (((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ↔ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑))))
76	75	orbi2i 909	. . . . . . . . . 10 ⊢ ((((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑)))) ↔ (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))))
77	71, 76	bitr2i 278	. . . . . . . . 9 ⊢ ((((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))) ↔ (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
78	77	rexbii 3247	. . . . . . . 8 ⊢ (∃𝑐 ∈ 𝐴 (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))) ∨ ((𝑎‘𝑐)𝑆(𝑏‘𝑐) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑎‘𝑑) = (𝑏‘𝑑)))) ↔ ∃𝑐 ∈ 𝐴 (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
79	69, 70, 78	3bitr2i 301	. . . . . . 7 ⊢ ((𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏) ↔ ∃𝑐 ∈ 𝐴 (((𝑏‘𝑐)𝑆(𝑎‘𝑐) ∨ (𝑎‘𝑐)𝑆(𝑏‘𝑐)) ∧ ∀𝑑 ∈ 𝐴 (𝑑𝑅𝑐 → (𝑏‘𝑑) = (𝑎‘𝑑))))
80	64, 79	sylibr 236	. . . . . 6 ⊢ ((𝜑 ∧ ((𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈) ∧ 𝑎 ≠ 𝑏)) → (𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏))
81	80	expr 459	. . . . 5 ⊢ ((𝜑 ∧ (𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈)) → (𝑎 ≠ 𝑏 → (𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏)))
82	12, 81	syl5bir 245	. . . 4 ⊢ ((𝜑 ∧ (𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈)) → (¬ 𝑎 = 𝑏 → (𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏)))
83	82	orrd 859	. . 3 ⊢ ((𝜑 ∧ (𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈)) → (𝑎 = 𝑏 ∨ (𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏)))
84		3orrot 1088	. . . 4 ⊢ ((𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎) ↔ (𝑎 = 𝑏 ∨ 𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏))
85		3orass 1086	. . . 4 ⊢ ((𝑎 = 𝑏 ∨ 𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏) ↔ (𝑎 = 𝑏 ∨ (𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏)))
86	84, 85	bitr2i 278	. . 3 ⊢ ((𝑎 = 𝑏 ∨ (𝑏𝑇𝑎 ∨ 𝑎𝑇𝑏)) ↔ (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
87	83, 86	sylib 220	. 2 ⊢ ((𝜑 ∧ (𝑎 ∈ 𝑈 ∧ 𝑏 ∈ 𝑈)) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
88	11, 87	issod 5500	1 ⊢ (𝜑 → 𝑇 Or 𝑈)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 398 ∨ wo 843 ∨ w3o 1082 = wceq 1533 ∈ wcel 2110 ≠ wne 3016 ∀wral 3138 ∃wrex 3139 {crab 3142 Vcvv 3494 ∖ cdif 3932 ⊆ wss 3935 class class class wbr 5058 {copab 5120 Po wpo 5466 Or wor 5467 dom cdm 5549 Fn wfn 6344 ⟶wf 6345 ‘cfv 6349 (class class class)co 7150 ↑_m cmap 8400

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-iun 4913 df-br 5059 df-opab 5121 df-mpt 5139 df-id 5454 df-po 5468 df-so 5469 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-iota 6308 df-fun 6351 df-fn 6352 df-f 6353 df-fv 6357 df-ov 7153 df-oprab 7154 df-mpo 7155 df-1st 7683 df-2nd 7684 df-map 8402

This theorem is referenced by: wemapso 9009 wemapso2lem 9010

W3C validator