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Theorem prdsxmetlem 24595

Description: The product metric is an extended metric. (Contributed by Mario Carneiro, 20-Aug-2015.)

**Hypotheses**
Ref	Expression
prdsdsf.y	⊢ 𝑌 = (𝑆X_s(𝑥 ∈ 𝐼 ↦ 𝑅))
prdsdsf.b	⊢ 𝐵 = (Base‘𝑌)
prdsdsf.v	⊢ 𝑉 = (Base‘𝑅)
prdsdsf.e	⊢ 𝐸 = ((dist‘𝑅) ↾ (𝑉 × 𝑉))
prdsdsf.d	⊢ 𝐷 = (dist‘𝑌)
prdsdsf.s	⊢ (𝜑 → 𝑆 ∈ 𝑊)
prdsdsf.i	⊢ (𝜑 → 𝐼 ∈ 𝑋)
prdsdsf.r	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → 𝑅 ∈ 𝑍)
prdsdsf.m	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → 𝐸 ∈ (∞Met‘𝑉))

**Assertion**
Ref	Expression
prdsxmetlem	⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝐵))

Distinct variable groups: 𝑥,𝐼 𝜑,𝑥 𝑥,𝐵 𝑥,𝐷 Allowed substitution hints: 𝑅(𝑥) 𝑆(𝑥) 𝐸(𝑥) 𝑉(𝑥) 𝑊(𝑥) 𝑋(𝑥) 𝑌(𝑥) 𝑍(𝑥)

Proof of Theorem prdsxmetlem Dummy variables 𝑓 𝑔 ℎ 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		prdsdsf.b	. . . 4 ⊢ 𝐵 = (Base‘𝑌)
2	1	fvexi 6893	. . 3 ⊢ 𝐵 ∈ V
3	2	a1i 11	. 2 ⊢ (𝜑 → 𝐵 ∈ V)
4		prdsdsf.y	. . . 4 ⊢ 𝑌 = (𝑆X_s(𝑥 ∈ 𝐼 ↦ 𝑅))
5		prdsdsf.v	. . . 4 ⊢ 𝑉 = (Base‘𝑅)
6		prdsdsf.e	. . . 4 ⊢ 𝐸 = ((dist‘𝑅) ↾ (𝑉 × 𝑉))
7		prdsdsf.d	. . . 4 ⊢ 𝐷 = (dist‘𝑌)
8		prdsdsf.s	. . . 4 ⊢ (𝜑 → 𝑆 ∈ 𝑊)
9		prdsdsf.i	. . . 4 ⊢ (𝜑 → 𝐼 ∈ 𝑋)
10		prdsdsf.r	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → 𝑅 ∈ 𝑍)
11		prdsdsf.m	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → 𝐸 ∈ (∞Met‘𝑉))
12	4, 1, 5, 6, 7, 8, 9, 10, 11	prdsdsf 24594	. . 3 ⊢ (𝜑 → 𝐷:(𝐵 × 𝐵)⟶(0[,]+∞))
13		iccssxr 13484	. . 3 ⊢ (0[,]+∞) ⊆ ℝ^*
14		fss 6720	. . 3 ⊢ ((𝐷:(𝐵 × 𝐵)⟶(0[,]+∞) ∧ (0[,]+∞) ⊆ ℝ^) → 𝐷:(𝐵 × 𝐵)⟶ℝ^)
15	12, 13, 14	sylancl 598	. 2 ⊢ (𝜑 → 𝐷:(𝐵 × 𝐵)⟶ℝ^*)
16	12	fovcdmda 7586	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (𝑓𝐷𝑔) ∈ (0[,]+∞))
17		elxrge0 13511	. . . 4 ⊢ ((𝑓𝐷𝑔) ∈ (0[,]+∞) ↔ ((𝑓𝐷𝑔) ∈ ℝ^* ∧ 0 ≤ (𝑓𝐷𝑔)))
18	17	simprbi 503	. . 3 ⊢ ((𝑓𝐷𝑔) ∈ (0[,]+∞) → 0 ≤ (𝑓𝐷𝑔))
19	16, 18	syl 18	. 2 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 0 ≤ (𝑓𝐷𝑔))
20	8	adantr 486	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 𝑆 ∈ 𝑊)
21	9	adantr 486	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 𝐼 ∈ 𝑋)
22	10	ralrimiva 3154	. . . . . 6 ⊢ (𝜑 → ∀𝑥 ∈ 𝐼 𝑅 ∈ 𝑍)
23	22	adantr 486	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → ∀𝑥 ∈ 𝐼 𝑅 ∈ 𝑍)
24		simprl 783	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 𝑓 ∈ 𝐵)
25		simprr 785	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 𝑔 ∈ 𝐵)
26	4, 1, 20, 21, 23, 24, 25, 5, 6, 7	prdsdsval3 17571	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (𝑓𝐷𝑔) = sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
27	26	breq1d 5113	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → ((𝑓𝐷𝑔) ≤ 0 ↔ sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ) ≤ 0))
28	11	adantlr 728	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → 𝐸 ∈ (∞Met‘𝑉))
29	4, 1, 20, 21, 23, 5, 24	prdsbascl 17569	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → ∀𝑥 ∈ 𝐼 (𝑓‘𝑥) ∈ 𝑉)
30	29	r19.21bi 3254	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → (𝑓‘𝑥) ∈ 𝑉)
31	4, 1, 20, 21, 23, 5, 25	prdsbascl 17569	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → ∀𝑥 ∈ 𝐼 (𝑔‘𝑥) ∈ 𝑉)
32	31	r19.21bi 3254	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → (𝑔‘𝑥) ∈ 𝑉)
33		xmetcl 24558	. . . . . . . 8 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (𝑓‘𝑥) ∈ 𝑉 ∧ (𝑔‘𝑥) ∈ 𝑉) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^*)
34	28, 30, 32, 33	syl3anc 1398	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^*)
35	34	fmpttd 7109	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))):𝐼⟶ℝ^*)
36	35	frnd 6712	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ⊆ ℝ^*)
37		0xr 11281	. . . . . . 7 ⊢ 0 ∈ ℝ^*
38	37	a1i 11	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 0 ∈ ℝ^*)
39	38	snssd 4747	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → {0} ⊆ ℝ^*)
40	36, 39	unssd 4138	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^*)
41		supxrleub 13379	. . . 4 ⊢ (((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^* ∧ 0 ∈ ℝ^) → (sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^, < ) ≤ 0 ↔ ∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ 0))
42	40, 37, 41	sylancl 598	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ) ≤ 0 ↔ ∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ 0))
43		0le0 12367	. . . . . . 7 ⊢ 0 ≤ 0
44		c0ex 11225	. . . . . . . 8 ⊢ 0 ∈ V
45		breq1 5106	. . . . . . . 8 ⊢ (𝑧 = 0 → (𝑧 ≤ 0 ↔ 0 ≤ 0))
46	44, 45	ralsn 4642	. . . . . . 7 ⊢ (∀𝑧 ∈ {0}𝑧 ≤ 0 ↔ 0 ≤ 0)
47	43, 46	mpbir 234	. . . . . 6 ⊢ ∀𝑧 ∈ {0}𝑧 ≤ 0
48		ralunb 4143	. . . . . 6 ⊢ (∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ 0 ↔ (∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ 0 ∧ ∀𝑧 ∈ {0}𝑧 ≤ 0))
49	47, 48	mpbiran2 723	. . . . 5 ⊢ (∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ 0 ↔ ∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ 0)
50		ovex 7447	. . . . . . 7 ⊢ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ V
51	50	rgenw 3080	. . . . . 6 ⊢ ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ V
52		eqid 2760	. . . . . . 7 ⊢ (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) = (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))
53		breq1 5106	. . . . . . 7 ⊢ (𝑧 = ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) → (𝑧 ≤ 0 ↔ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0))
54	52, 53	ralrnmptw 7088	. . . . . 6 ⊢ (∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ V → (∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ 0 ↔ ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0))
55	51, 54	ax-mp 5	. . . . 5 ⊢ (∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ 0 ↔ ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0)
56	49, 55	bitri 278	. . . 4 ⊢ (∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ 0 ↔ ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0)
57		xmetge0 24571	. . . . . . . . 9 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (𝑓‘𝑥) ∈ 𝑉 ∧ (𝑔‘𝑥) ∈ 𝑉) → 0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))
58	28, 30, 32, 57	syl3anc 1398	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → 0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))
59	58	biantrud 541	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ↔ (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ∧ 0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))))
60		xrletri3 13206	. . . . . . . 8 ⊢ ((((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^* ∧ 0 ∈ ℝ^*) → (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) = 0 ↔ (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ∧ 0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))))
61	34, 37, 60	sylancl 598	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) = 0 ↔ (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ∧ 0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))))
62		xmeteq0 24565	. . . . . . . 8 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (𝑓‘𝑥) ∈ 𝑉 ∧ (𝑔‘𝑥) ∈ 𝑉) → (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) = 0 ↔ (𝑓‘𝑥) = (𝑔‘𝑥)))
63	28, 30, 32, 62	syl3anc 1398	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) = 0 ↔ (𝑓‘𝑥) = (𝑔‘𝑥)))
64	59, 61, 63	3bitr2d 310	. . . . . 6 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) ∧ 𝑥 ∈ 𝐼) → (((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ↔ (𝑓‘𝑥) = (𝑔‘𝑥)))
65	64	ralbidva 3183	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ↔ ∀𝑥 ∈ 𝐼 (𝑓‘𝑥) = (𝑔‘𝑥)))
66		eqid 2760	. . . . . . . . . 10 ⊢ (𝑥 ∈ 𝐼 ↦ 𝑅) = (𝑥 ∈ 𝐼 ↦ 𝑅)
67	66	fnmpt 6673	. . . . . . . . 9 ⊢ (∀𝑥 ∈ 𝐼 𝑅 ∈ 𝑍 → (𝑥 ∈ 𝐼 ↦ 𝑅) Fn 𝐼)
68	22, 67	syl 18	. . . . . . . 8 ⊢ (𝜑 → (𝑥 ∈ 𝐼 ↦ 𝑅) Fn 𝐼)
69	68	adantr 486	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (𝑥 ∈ 𝐼 ↦ 𝑅) Fn 𝐼)
70	4, 1, 20, 21, 69, 24	prdsbasfn 17557	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 𝑓 Fn 𝐼)
71	4, 1, 20, 21, 69, 25	prdsbasfn 17557	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → 𝑔 Fn 𝐼)
72		eqfnfv 7023	. . . . . 6 ⊢ ((𝑓 Fn 𝐼 ∧ 𝑔 Fn 𝐼) → (𝑓 = 𝑔 ↔ ∀𝑥 ∈ 𝐼 (𝑓‘𝑥) = (𝑔‘𝑥)))
73	70, 71, 72	syl2anc 596	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (𝑓 = 𝑔 ↔ ∀𝑥 ∈ 𝐼 (𝑓‘𝑥) = (𝑔‘𝑥)))
74	65, 73	bitr4d 285	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ 0 ↔ 𝑓 = 𝑔))
75	56, 74	bitrid 286	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ 0 ↔ 𝑓 = 𝑔))
76	27, 42, 75	3bitrd 308	. 2 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → ((𝑓𝐷𝑔) ≤ 0 ↔ 𝑓 = 𝑔))
77	26	3adantr3 1190	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵)) → (𝑓𝐷𝑔) = sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
78	77	3adant3 1150	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (𝑓𝐷𝑔) = sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
79	11	3ad2antl1 1204	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → 𝐸 ∈ (∞Met‘𝑉))
80	29	3adantr3 1190	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵)) → ∀𝑥 ∈ 𝐼 (𝑓‘𝑥) ∈ 𝑉)
81	80	3adant3 1150	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑥 ∈ 𝐼 (𝑓‘𝑥) ∈ 𝑉)
82	81	r19.21bi 3254	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (𝑓‘𝑥) ∈ 𝑉)
83	31	3adantr3 1190	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵)) → ∀𝑥 ∈ 𝐼 (𝑔‘𝑥) ∈ 𝑉)
84	83	3adant3 1150	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑥 ∈ 𝐼 (𝑔‘𝑥) ∈ 𝑉)
85	84	r19.21bi 3254	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (𝑔‘𝑥) ∈ 𝑉)
86	79, 82, 85, 33	syl3anc 1398	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^*)
87	8	3ad2ant1 1151	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 𝑆 ∈ 𝑊)
88	9	3ad2ant1 1151	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 𝐼 ∈ 𝑋)
89	22	3ad2ant1 1151	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑥 ∈ 𝐼 𝑅 ∈ 𝑍)
90		simp23 1227	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ℎ ∈ 𝐵)
91	4, 1, 87, 88, 89, 5, 90	prdsbascl 17569	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑥 ∈ 𝐼 (ℎ‘𝑥) ∈ 𝑉)
92	91	r19.21bi 3254	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (ℎ‘𝑥) ∈ 𝑉)
93		xmetcl 24558	. . . . . . . . . . . 12 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (ℎ‘𝑥) ∈ 𝑉 ∧ (𝑓‘𝑥) ∈ 𝑉) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ ℝ^*)
94	79, 92, 82, 93	syl3anc 1398	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ ℝ^*)
95		simp3l 1220	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ℎ𝐷𝑓) ∈ ℝ)
96	95	adantr 486	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (ℎ𝐷𝑓) ∈ ℝ)
97		xmetge0 24571	. . . . . . . . . . . 12 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (ℎ‘𝑥) ∈ 𝑉 ∧ (𝑓‘𝑥) ∈ 𝑉) → 0 ≤ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)))
98	79, 92, 82, 97	syl3anc 1398	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → 0 ≤ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)))
99	94	fmpttd 7109	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))):𝐼⟶ℝ^*)
100	99	frnd 6712	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ⊆ ℝ^*)
101	37	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 0 ∈ ℝ^*)
102	101	snssd 4747	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → {0} ⊆ ℝ^*)
103	100, 102	unssd 4138	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}) ⊆ ℝ^*)
104		ssun1 4124	. . . . . . . . . . . . . 14 ⊢ ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ⊆ (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0})
105		ovex 7447	. . . . . . . . . . . . . . . . 17 ⊢ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ V
106	105	elabrex 7240	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ 𝐼 → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ {𝑧 ∣ ∃𝑥 ∈ 𝐼 𝑧 = ((ℎ‘𝑥)𝐸(𝑓‘𝑥))})
107	106	adantl 487	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ {𝑧 ∣ ∃𝑥 ∈ 𝐼 𝑧 = ((ℎ‘𝑥)𝐸(𝑓‘𝑥))})
108		eqid 2760	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) = (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)))
109	108	rnmpt 5941	. . . . . . . . . . . . . . 15 ⊢ ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) = {𝑧 ∣ ∃𝑥 ∈ 𝐼 𝑧 = ((ℎ‘𝑥)𝐸(𝑓‘𝑥))}
110	107, 109	eleqtrrdi 2871	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))))
111	104, 110	sselid 3929	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}))
112		supxrub 13377	. . . . . . . . . . . . 13 ⊢ (((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}) ⊆ ℝ^* ∧ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0})) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ≤ sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}), ℝ^*, < ))
113	103, 111, 112	syl2an2r 698	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ≤ sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}), ℝ^*, < ))
114		simp21 1225	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 𝑓 ∈ 𝐵)
115	4, 1, 87, 88, 89, 90, 114, 5, 6, 7	prdsdsval3 17571	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ℎ𝐷𝑓) = sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}), ℝ^*, < ))
116	115	adantr 486	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (ℎ𝐷𝑓) = sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑓‘𝑥))) ∪ {0}), ℝ^*, < ))
117	113, 116	breqtrrd 5133	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ≤ (ℎ𝐷𝑓))
118		xrrege0 13227	. . . . . . . . . . 11 ⊢ (((((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ ℝ^* ∧ (ℎ𝐷𝑓) ∈ ℝ) ∧ (0 ≤ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∧ ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ≤ (ℎ𝐷𝑓))) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ ℝ)
119	94, 96, 98, 117, 118	syl22anc 852	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑓‘𝑥)) ∈ ℝ)
120		xmetcl 24558	. . . . . . . . . . . 12 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (ℎ‘𝑥) ∈ 𝑉 ∧ (𝑔‘𝑥) ∈ 𝑉) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^*)
121	79, 92, 85, 120	syl3anc 1398	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^*)
122		simp3r 1221	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ℎ𝐷𝑔) ∈ ℝ)
123	122	adantr 486	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (ℎ𝐷𝑔) ∈ ℝ)
124		xmetge0 24571	. . . . . . . . . . . 12 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ (ℎ‘𝑥) ∈ 𝑉 ∧ (𝑔‘𝑥) ∈ 𝑉) → 0 ≤ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)))
125	79, 92, 85, 124	syl3anc 1398	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → 0 ≤ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)))
126	121	fmpttd 7109	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))):𝐼⟶ℝ^*)
127	126	frnd 6712	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ⊆ ℝ^*)
128	127, 102	unssd 4138	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^*)
129		ssun1 4124	. . . . . . . . . . . . . 14 ⊢ ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ⊆ (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})
130		ovex 7447	. . . . . . . . . . . . . . . . 17 ⊢ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ V
131	130	elabrex 7240	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ 𝐼 → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ {𝑧 ∣ ∃𝑥 ∈ 𝐼 𝑧 = ((ℎ‘𝑥)𝐸(𝑔‘𝑥))})
132	131	adantl 487	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ {𝑧 ∣ ∃𝑥 ∈ 𝐼 𝑧 = ((ℎ‘𝑥)𝐸(𝑔‘𝑥))})
133		eqid 2760	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) = (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)))
134	133	rnmpt 5941	. . . . . . . . . . . . . . 15 ⊢ ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) = {𝑧 ∣ ∃𝑥 ∈ 𝐼 𝑧 = ((ℎ‘𝑥)𝐸(𝑔‘𝑥))}
135	132, 134	eleqtrrdi 2871	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))))
136	129, 135	sselid 3929	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}))
137		supxrub 13377	. . . . . . . . . . . . 13 ⊢ (((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^* ∧ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ (ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ≤ sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
138	128, 136, 137	syl2an2r 698	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ≤ sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
139		simp22 1226	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 𝑔 ∈ 𝐵)
140	4, 1, 87, 88, 89, 90, 139, 5, 6, 7	prdsdsval3 17571	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ℎ𝐷𝑔) = sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
141	140	adantr 486	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (ℎ𝐷𝑔) = sup((ran (𝑥 ∈ 𝐼 ↦ ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ))
142	138, 141	breqtrrd 5133	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ≤ (ℎ𝐷𝑔))
143		xrrege0 13227	. . . . . . . . . . 11 ⊢ (((((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^* ∧ (ℎ𝐷𝑔) ∈ ℝ) ∧ (0 ≤ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∧ ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ≤ (ℎ𝐷𝑔))) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ)
144	121, 123, 125, 142, 143	syl22anc 852	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ)
145	119, 144	readdcld 11263	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) + ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∈ ℝ)
146	79, 82, 85, 57	syl3anc 1398	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → 0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))
147		xmettri2 24567	. . . . . . . . . . 11 ⊢ ((𝐸 ∈ (∞Met‘𝑉) ∧ ((ℎ‘𝑥) ∈ 𝑉 ∧ (𝑓‘𝑥) ∈ 𝑉 ∧ (𝑔‘𝑥) ∈ 𝑉)) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) +_𝑒 ((ℎ‘𝑥)𝐸(𝑔‘𝑥))))
148	79, 92, 82, 85, 147	syl13anc 1399	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) +_𝑒 ((ℎ‘𝑥)𝐸(𝑔‘𝑥))))
149	119, 144	rexaddd 13287	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) +_𝑒 ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) = (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) + ((ℎ‘𝑥)𝐸(𝑔‘𝑥))))
150	148, 149	breqtrd 5131	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) + ((ℎ‘𝑥)𝐸(𝑔‘𝑥))))
151		xrrege0 13227	. . . . . . . . 9 ⊢ (((((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^* ∧ (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) + ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ∈ ℝ) ∧ (0 ≤ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∧ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) + ((ℎ‘𝑥)𝐸(𝑔‘𝑥))))) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ)
152	86, 145, 146, 150, 151	syl22anc 852	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ)
153		readdcl 11208	. . . . . . . . . 10 ⊢ (((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ) → ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ∈ ℝ)
154	153	3ad2ant3 1153	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ∈ ℝ)
155	154	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ∈ ℝ)
156	119, 144, 96, 123, 117, 142	le2addd 11858	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → (((ℎ‘𝑥)𝐸(𝑓‘𝑥)) + ((ℎ‘𝑥)𝐸(𝑔‘𝑥))) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
157	152, 145, 155, 150, 156	letrd 11392	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) ∧ 𝑥 ∈ 𝐼) → ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
158	157	ralrimiva 3154	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
159	86	ralrimiva 3154	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^*)
160		breq1 5106	. . . . . . . 8 ⊢ (𝑧 = ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) → (𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
161	52, 160	ralrnmptw 7088	. . . . . . 7 ⊢ (∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ∈ ℝ^* → (∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
162	159, 161	syl 18	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ ∀𝑥 ∈ 𝐼 ((𝑓‘𝑥)𝐸(𝑔‘𝑥)) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
163	158, 162	mpbird 260	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
164	12	3ad2ant1 1151	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 𝐷:(𝐵 × 𝐵)⟶(0[,]+∞))
165	164, 90, 114	fovcdmd 7587	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ℎ𝐷𝑓) ∈ (0[,]+∞))
166		elxrge0 13511	. . . . . . . . 9 ⊢ ((ℎ𝐷𝑓) ∈ (0[,]+∞) ↔ ((ℎ𝐷𝑓) ∈ ℝ^* ∧ 0 ≤ (ℎ𝐷𝑓)))
167	166	simprbi 503	. . . . . . . 8 ⊢ ((ℎ𝐷𝑓) ∈ (0[,]+∞) → 0 ≤ (ℎ𝐷𝑓))
168	165, 167	syl 18	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 0 ≤ (ℎ𝐷𝑓))
169	164, 90, 139	fovcdmd 7587	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ℎ𝐷𝑔) ∈ (0[,]+∞))
170		elxrge0 13511	. . . . . . . . 9 ⊢ ((ℎ𝐷𝑔) ∈ (0[,]+∞) ↔ ((ℎ𝐷𝑔) ∈ ℝ^* ∧ 0 ≤ (ℎ𝐷𝑔)))
171	170	simprbi 503	. . . . . . . 8 ⊢ ((ℎ𝐷𝑔) ∈ (0[,]+∞) → 0 ≤ (ℎ𝐷𝑔))
172	169, 171	syl 18	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 0 ≤ (ℎ𝐷𝑔))
173	95, 122, 168, 172	addge0d 11815	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → 0 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
174		breq1 5106	. . . . . . 7 ⊢ (𝑧 = 0 → (𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ 0 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
175	44, 174	ralsn 4642	. . . . . 6 ⊢ (∀𝑧 ∈ {0}𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ 0 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
176	173, 175	sylibr 237	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑧 ∈ {0}𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
177		ralunb 4143	. . . . 5 ⊢ (∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ (∀𝑧 ∈ ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥)))𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ∧ ∀𝑧 ∈ {0}𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
178	163, 176, 177	sylanbrc 595	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
179	40	3adantr3 1190	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵)) → (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^*)
180	179	3adant3 1150	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^*)
181	154	rexrd 11284	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ∈ ℝ^*)
182		supxrleub 13379	. . . . 5 ⊢ (((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}) ⊆ ℝ^* ∧ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ∈ ℝ^) → (sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^, < ) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ ∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
183	180, 181, 182	syl2anc 596	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)) ↔ ∀𝑧 ∈ (ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0})𝑧 ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔))))
184	178, 183	mpbird 260	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → sup((ran (𝑥 ∈ 𝐼 ↦ ((𝑓‘𝑥)𝐸(𝑔‘𝑥))) ∪ {0}), ℝ^*, < ) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
185	78, 184	eqbrtrd 5127	. 2 ⊢ ((𝜑 ∧ (𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵 ∧ ℎ ∈ 𝐵) ∧ ((ℎ𝐷𝑓) ∈ ℝ ∧ (ℎ𝐷𝑔) ∈ ℝ)) → (𝑓𝐷𝑔) ≤ ((ℎ𝐷𝑓) + (ℎ𝐷𝑔)))
186	3, 15, 19, 76, 185	isxmet2d 24554	1 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝐵))

Colors of variables: wff setvar class

This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 {cab 2738 ∀wral 3076 ∃wrex 3086 Vcvv 3450 ∪ cun 3897 ⊆ wss 3899 {csn 4584 class class class wbr 5103 ↦ cmpt 5186 × cxp 5653 ran crn 5656 ↾ cres 5657 Fn wfn 6528 ⟶wf 6529 ‘cfv 6533 (class class class)co 7414 supcsup 9411 ℝcr 11124 0cc0 11125 + caddc 11128 +∞cpnf 11265 ℝ^*cxr 11267 < clt 11268 ≤ cle 11269 +_𝑒 cxad 13162 [,]cicc 13402 Basecbs 17302 distcds 17352 X_scprds 17531 ∞Metcxmet 21571

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-addrcl 11186 ax-mulcl 11187 ax-mulrcl 11188 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-i2m1 11193 ax-1ne0 11194 ax-1rid 11195 ax-rnegex 11196 ax-rrecex 11197 ax-cnre 11198 ax-pre-lttri 11199 ax-pre-lttrn 11200 ax-pre-ltadd 11201 ax-pre-mulgt0 11202 ax-pre-sup 11203

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8456 df-er 8697 df-map 8829 df-ixp 8906 df-en 8954 df-dom 8955 df-sdom 8956 df-fin 8957 df-sup 9413 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 df-sub 11468 df-neg 11469 df-div 11897 df-nn 12259 df-2 12328 df-3 12329 df-4 12330 df-5 12331 df-6 12332 df-7 12333 df-8 12334 df-9 12335 df-n0 12530 df-z 12617 df-dec 12738 df-uz 12889 df-rp 13044 df-xneg 13164 df-xadd 13165 df-xmul 13166 df-icc 13406 df-fz 13563 df-struct 17240 df-slot 17275 df-ndx 17287 df-base 17303 df-plusg 17356 df-mulr 17357 df-sca 17359 df-vsca 17360 df-ip 17361 df-tset 17362 df-ple 17363 df-ds 17365 df-hom 17367 df-cco 17368 df-prds 17533 df-xmet 21579

This theorem is used by: prdsxmet 24596

W3C validator