Theorem pstmfval 33886

Description: Function value of the metric induced by a pseudometric 𝐷 (Contributed by Thierry Arnoux, 11-Feb-2018.)

Hypothesis

Ref	Expression
pstmval.1	⊢ ∼ = (~Met‘𝐷)

Assertion

Ref	Expression
pstmfval	⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ([𝐴] ∼ (pstoMet‘𝐷)[𝐵] ∼ ) = (𝐴𝐷𝐵))

Proof of Theorem pstmfval

Dummy variables 𝑎 𝑏 𝑥 𝑦 𝑧 𝑒 𝑓 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		pstmval.1	. . . . 5 ⊢ ∼ = (~Met‘𝐷)
2	1	pstmval 33885	. . . 4 ⊢ (𝐷 ∈ (PsMet‘𝑋) → (pstoMet‘𝐷) = (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)}))
3	2	3ad2ant1 1133	. . 3 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (pstoMet‘𝐷) = (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)}))
4	3	oveqd 7404	. 2 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ([𝐴] ∼ (pstoMet‘𝐷)[𝐵] ∼ ) = ([𝐴] ∼ (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)})[𝐵] ∼ ))
5	1	fvexi 6872	. . . . 5 ⊢ ∼ ∈ V
6	5	ecelqsi 8743	. . . 4 ⊢ (𝐴 ∈ 𝑋 → [𝐴] ∼ ∈ (𝑋 / ∼ ))
7	6	3ad2ant2 1134	. . 3 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → [𝐴] ∼ ∈ (𝑋 / ∼ ))
8	5	ecelqsi 8743	. . . 4 ⊢ (𝐵 ∈ 𝑋 → [𝐵] ∼ ∈ (𝑋 / ∼ ))
9	8	3ad2ant3 1135	. . 3 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → [𝐵] ∼ ∈ (𝑋 / ∼ ))
10		rexeq 3295	. . . . . 6 ⊢ (𝑥 = [𝐴] ∼ → (∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏) ↔ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)))
11	10	abbidv 2795	. . . . 5 ⊢ (𝑥 = [𝐴] ∼ → {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)} = {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)})
12	11	unieqd 4884	. . . 4 ⊢ (𝑥 = [𝐴] ∼ → ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)} = ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)})
13		rexeq 3295	. . . . . . 7 ⊢ (𝑦 = [𝐵] ∼ → (∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏) ↔ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)))
14	13	rexbidv 3157	. . . . . 6 ⊢ (𝑦 = [𝐵] ∼ → (∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏) ↔ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)))
15	14	abbidv 2795	. . . . 5 ⊢ (𝑦 = [𝐵] ∼ → {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)} = {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)})
16	15	unieqd 4884	. . . 4 ⊢ (𝑦 = [𝐵] ∼ → ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)} = ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)})
17		eqid 2729	. . . 4 ⊢ (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)}) = (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)})
18		ecexg 8675	. . . . . . 7 ⊢ ( ∼ ∈ V → [𝐴] ∼ ∈ V)
19	5, 18	ax-mp 5	. . . . . 6 ⊢ [𝐴] ∼ ∈ V
20		ecexg 8675	. . . . . . 7 ⊢ ( ∼ ∈ V → [𝐵] ∼ ∈ V)
21	5, 20	ax-mp 5	. . . . . 6 ⊢ [𝐵] ∼ ∈ V
22	19, 21	ab2rexex 7958	. . . . 5 ⊢ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)} ∈ V
23	22	uniex 7717	. . . 4 ⊢ ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)} ∈ V
24	12, 16, 17, 23	ovmpo 7549	. . 3 ⊢ (([𝐴] ∼ ∈ (𝑋 / ∼ ) ∧ [𝐵] ∼ ∈ (𝑋 / ∼ )) → ([𝐴] ∼ (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)})[𝐵] ∼ ) = ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)})
25	7, 9, 24	syl2anc 584	. 2 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ([𝐴] ∼ (𝑥 ∈ (𝑋 / ∼ ), 𝑦 ∈ (𝑋 / ∼ ) ↦ ∪ {𝑧 ∣ ∃𝑎 ∈ 𝑥 ∃𝑏 ∈ 𝑦 𝑧 = (𝑎𝐷𝑏)})[𝐵] ∼ ) = ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)})
26		simpr3 1197	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝑧 = (𝑒𝐷𝑓))
27		simpl1 1192	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝐷 ∈ (PsMet‘𝑋))
28		simpr1 1195	. . . . . . . . . . . . . 14 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝑒 ∈ [𝐴] ∼ )
29		metidss 33881	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐷 ∈ (PsMet‘𝑋) → (~Met‘𝐷) ⊆ (𝑋 × 𝑋))
30	1, 29	eqsstrid 3985	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐷 ∈ (PsMet‘𝑋) → ∼ ⊆ (𝑋 × 𝑋))
31		xpss 5654	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑋 × 𝑋) ⊆ (V × V)
32	30, 31	sstrdi 3959	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐷 ∈ (PsMet‘𝑋) → ∼ ⊆ (V × V))
33		df-rel 5645	. . . . . . . . . . . . . . . . . 18 ⊢ (Rel ∼ ↔ ∼ ⊆ (V × V))
34	32, 33	sylibr 234	. . . . . . . . . . . . . . . . 17 ⊢ (𝐷 ∈ (PsMet‘𝑋) → Rel ∼ )
35	34	3ad2ant1 1133	. . . . . . . . . . . . . . . 16 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → Rel ∼ )
36	35	adantr 480	. . . . . . . . . . . . . . 15 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → Rel ∼ )
37		relelec 8718	. . . . . . . . . . . . . . 15 ⊢ (Rel ∼ → (𝑒 ∈ [𝐴] ∼ ↔ 𝐴 ∼ 𝑒))
38	36, 37	syl 17	. . . . . . . . . . . . . 14 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → (𝑒 ∈ [𝐴] ∼ ↔ 𝐴 ∼ 𝑒))
39	28, 38	mpbid 232	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝐴 ∼ 𝑒)
40	1	breqi 5113	. . . . . . . . . . . . 13 ⊢ (𝐴 ∼ 𝑒 ↔ 𝐴(~Met‘𝐷)𝑒)
41	39, 40	sylib 218	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝐴(~Met‘𝐷)𝑒)
42		simpr2 1196	. . . . . . . . . . . . . 14 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝑓 ∈ [𝐵] ∼ )
43		relelec 8718	. . . . . . . . . . . . . . 15 ⊢ (Rel ∼ → (𝑓 ∈ [𝐵] ∼ ↔ 𝐵 ∼ 𝑓))
44	36, 43	syl 17	. . . . . . . . . . . . . 14 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → (𝑓 ∈ [𝐵] ∼ ↔ 𝐵 ∼ 𝑓))
45	42, 44	mpbid 232	. . . . . . . . . . . . 13 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝐵 ∼ 𝑓)
46	1	breqi 5113	. . . . . . . . . . . . 13 ⊢ (𝐵 ∼ 𝑓 ↔ 𝐵(~Met‘𝐷)𝑓)
47	45, 46	sylib 218	. . . . . . . . . . . 12 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝐵(~Met‘𝐷)𝑓)
48		metideq 33883	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ (𝐴(~Met‘𝐷)𝑒 ∧ 𝐵(~Met‘𝐷)𝑓)) → (𝐴𝐷𝐵) = (𝑒𝐷𝑓))
49	27, 41, 47, 48	syl12anc 836	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → (𝐴𝐷𝐵) = (𝑒𝐷𝑓))
50	26, 49	eqtr4d 2767	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝑧 = (𝐴𝐷𝐵))
51	50	adantlr 715	. . . . . . . . 9 ⊢ ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)) ∧ (𝑒 ∈ [𝐴] ∼ ∧ 𝑓 ∈ [𝐵] ∼ ∧ 𝑧 = (𝑒𝐷𝑓))) → 𝑧 = (𝐴𝐷𝐵))
52	51	3anassrs 1361	. . . . . . . 8 ⊢ ((((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)) ∧ 𝑒 ∈ [𝐴] ∼ ) ∧ 𝑓 ∈ [𝐵] ∼ ) ∧ 𝑧 = (𝑒𝐷𝑓)) → 𝑧 = (𝐴𝐷𝐵))
53		oveq1 7394	. . . . . . . . . . . 12 ⊢ (𝑎 = 𝑒 → (𝑎𝐷𝑏) = (𝑒𝐷𝑏))
54	53	eqeq2d 2740	. . . . . . . . . . 11 ⊢ (𝑎 = 𝑒 → (𝑧 = (𝑎𝐷𝑏) ↔ 𝑧 = (𝑒𝐷𝑏)))
55		oveq2 7395	. . . . . . . . . . . 12 ⊢ (𝑏 = 𝑓 → (𝑒𝐷𝑏) = (𝑒𝐷𝑓))
56	55	eqeq2d 2740	. . . . . . . . . . 11 ⊢ (𝑏 = 𝑓 → (𝑧 = (𝑒𝐷𝑏) ↔ 𝑧 = (𝑒𝐷𝑓)))
57	54, 56	cbvrex2vw 3220	. . . . . . . . . 10 ⊢ (∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏) ↔ ∃𝑒 ∈ [ 𝐴] ∼ ∃𝑓 ∈ [ 𝐵] ∼ 𝑧 = (𝑒𝐷𝑓))
58	57	biimpi 216	. . . . . . . . 9 ⊢ (∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏) → ∃𝑒 ∈ [ 𝐴] ∼ ∃𝑓 ∈ [ 𝐵] ∼ 𝑧 = (𝑒𝐷𝑓))
59	58	adantl 481	. . . . . . . 8 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)) → ∃𝑒 ∈ [ 𝐴] ∼ ∃𝑓 ∈ [ 𝐵] ∼ 𝑧 = (𝑒𝐷𝑓))
60	52, 59	r19.29vva 3197	. . . . . . 7 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)) → 𝑧 = (𝐴𝐷𝐵))
61		simpl1 1192	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → 𝐷 ∈ (PsMet‘𝑋))
62		simpl2 1193	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → 𝐴 ∈ 𝑋)
63		psmet0 24196	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋) → (𝐴𝐷𝐴) = 0)
64	61, 62, 63	syl2anc 584	. . . . . . . . 9 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐴𝐷𝐴) = 0)
65		relelec 8718	. . . . . . . . . . 11 ⊢ (Rel ∼ → (𝐴 ∈ [𝐴] ∼ ↔ 𝐴 ∼ 𝐴))
66	61, 34, 65	3syl 18	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐴 ∈ [𝐴] ∼ ↔ 𝐴 ∼ 𝐴))
67	1	a1i 11	. . . . . . . . . . 11 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → ∼ = (~Met‘𝐷))
68	67	breqd 5118	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐴 ∼ 𝐴 ↔ 𝐴(~Met‘𝐷)𝐴))
69		metidv 33882	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ (𝐴 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋)) → (𝐴(~Met‘𝐷)𝐴 ↔ (𝐴𝐷𝐴) = 0))
70	61, 62, 62, 69	syl12anc 836	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐴(~Met‘𝐷)𝐴 ↔ (𝐴𝐷𝐴) = 0))
71	66, 68, 70	3bitrd 305	. . . . . . . . 9 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐴 ∈ [𝐴] ∼ ↔ (𝐴𝐷𝐴) = 0))
72	64, 71	mpbird 257	. . . . . . . 8 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → 𝐴 ∈ [𝐴] ∼ )
73		simpl3 1194	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → 𝐵 ∈ 𝑋)
74		psmet0 24196	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐵 ∈ 𝑋) → (𝐵𝐷𝐵) = 0)
75	61, 73, 74	syl2anc 584	. . . . . . . . 9 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐵𝐷𝐵) = 0)
76		relelec 8718	. . . . . . . . . . 11 ⊢ (Rel ∼ → (𝐵 ∈ [𝐵] ∼ ↔ 𝐵 ∼ 𝐵))
77	61, 34, 76	3syl 18	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐵 ∈ [𝐵] ∼ ↔ 𝐵 ∼ 𝐵))
78	67	breqd 5118	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐵 ∼ 𝐵 ↔ 𝐵(~Met‘𝐷)𝐵))
79		metidv 33882	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ (𝐵 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐵(~Met‘𝐷)𝐵 ↔ (𝐵𝐷𝐵) = 0))
80	61, 73, 73, 79	syl12anc 836	. . . . . . . . . 10 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐵(~Met‘𝐷)𝐵 ↔ (𝐵𝐷𝐵) = 0))
81	77, 78, 80	3bitrd 305	. . . . . . . . 9 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → (𝐵 ∈ [𝐵] ∼ ↔ (𝐵𝐷𝐵) = 0))
82	75, 81	mpbird 257	. . . . . . . 8 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → 𝐵 ∈ [𝐵] ∼ )
83		simpr 484	. . . . . . . 8 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → 𝑧 = (𝐴𝐷𝐵))
84		rspceov 7436	. . . . . . . 8 ⊢ ((𝐴 ∈ [𝐴] ∼ ∧ 𝐵 ∈ [𝐵] ∼ ∧ 𝑧 = (𝐴𝐷𝐵)) → ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏))
85	72, 82, 83, 84	syl3anc 1373	. . . . . . 7 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ 𝑧 = (𝐴𝐷𝐵)) → ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏))
86	60, 85	impbida 800	. . . . . 6 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏) ↔ 𝑧 = (𝐴𝐷𝐵)))
87	86	abbidv 2795	. . . . 5 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)} = {𝑧 ∣ 𝑧 = (𝐴𝐷𝐵)})
88		df-sn 4590	. . . . 5 ⊢ {(𝐴𝐷𝐵)} = {𝑧 ∣ 𝑧 = (𝐴𝐷𝐵)}
89	87, 88	eqtr4di 2782	. . . 4 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)} = {(𝐴𝐷𝐵)})
90	89	unieqd 4884	. . 3 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)} = ∪ {(𝐴𝐷𝐵)})
91		ovex 7420	. . . 4 ⊢ (𝐴𝐷𝐵) ∈ V
92	91	unisn 4890	. . 3 ⊢ ∪ {(𝐴𝐷𝐵)} = (𝐴𝐷𝐵)
93	90, 92	eqtrdi 2780	. 2 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ∪ {𝑧 ∣ ∃𝑎 ∈ [ 𝐴] ∼ ∃𝑏 ∈ [ 𝐵] ∼ 𝑧 = (𝑎𝐷𝑏)} = (𝐴𝐷𝐵))
94	4, 25, 93	3eqtrd 2768	1 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ([𝐴] ∼ (pstoMet‘𝐷)[𝐵] ∼ ) = (𝐴𝐷𝐵))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109  {cab 2707  ∃wrex 3053  Vcvv 3447   ⊆ wss 3914  {csn 4589  ∪ cuni 4871   class class class wbr 5107   × cxp 5636  Rel wrel 5643  ‘cfv 6511  (class class class)co 7387   ∈ cmpo 7389  [cec 8669   / cqs 8670  0cc0 11068  PsMetcpsmet 21248  ~_Metcmetid 33876  pstoMetcpstm 33877

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5234  ax-sep 5251  ax-nul 5261  ax-pow 5320  ax-pr 5387  ax-un 7711  ax-cnex 11124  ax-resscn 11125  ax-1cn 11126  ax-icn 11127  ax-addcl 11128  ax-addrcl 11129  ax-mulcl 11130  ax-mulrcl 11131  ax-mulcom 11132  ax-addass 11133  ax-mulass 11134  ax-distr 11135  ax-i2m1 11136  ax-1ne0 11137  ax-1rid 11138  ax-rnegex 11139  ax-rrecex 11140  ax-cnre 11141  ax-pre-lttri 11142  ax-pre-lttrn 11143  ax-pre-ltadd 11144

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-reu 3355  df-rab 3406  df-v 3449  df-sbc 3754  df-csb 3863  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-nul 4297  df-if 4489  df-pw 4565  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-iun 4957  df-br 5108  df-opab 5170  df-mpt 5189  df-id 5533  df-po 5546  df-so 5547  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-rn 5649  df-res 5650  df-ima 5651  df-iota 6464  df-fun 6513  df-fn 6514  df-f 6515  df-f1 6516  df-fo 6517  df-f1o 6518  df-fv 6519  df-ov 7390  df-oprab 7391  df-mpo 7392  df-1st 7968  df-2nd 7969  df-er 8671  df-ec 8673  df-qs 8677  df-map 8801  df-en 8919  df-dom 8920  df-sdom 8921  df-pnf 11210  df-mnf 11211  df-xr 11212  df-ltxr 11213  df-le 11214  df-xadd 13073  df-psmet 21256  df-metid 33878  df-pstm 33879

This theorem is referenced by:  pstmxmet  33887