xblss2 - Metamath Proof Explorer

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Theorem xblss2 22207

Description: One ball is contained in another if the center-to-center distance is less than the difference of the radii. In this version of blss2 22209 for extended metrics, we have to assume the balls are a finite distance apart, or else 𝑃 will not even be in the infinity ball around 𝑄. (Contributed by Mario Carneiro, 23-Aug-2015.)

**Hypotheses**
Ref	Expression
xblss2.1	⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋))
xblss2.2	⊢ (𝜑 → 𝑃 ∈ 𝑋)
xblss2.3	⊢ (𝜑 → 𝑄 ∈ 𝑋)
xblss2.4	⊢ (𝜑 → 𝑅 ∈ ℝ^*)
xblss2.5	⊢ (𝜑 → 𝑆 ∈ ℝ^*)
xblss2.6	⊢ (𝜑 → (𝑃𝐷𝑄) ∈ ℝ)
xblss2.7	⊢ (𝜑 → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))

**Assertion**
Ref	Expression
xblss2	⊢ (𝜑 → (𝑃(ball‘𝐷)𝑅) ⊆ (𝑄(ball‘𝐷)𝑆))

Proof of Theorem xblss2 Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		xblss2.1	. . . . . 6 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋))
2		xblss2.2	. . . . . 6 ⊢ (𝜑 → 𝑃 ∈ 𝑋)
3		xblss2.4	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ ℝ^*)
4		elbl 22193	. . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ^*) → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
5	1, 2, 3, 4	syl3anc 1326	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
6	5	simprbda 653	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑥 ∈ 𝑋)
7	1	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝐷 ∈ (∞Met‘𝑋))
8		xblss2.3	. . . . . . . . 9 ⊢ (𝜑 → 𝑄 ∈ 𝑋)
9	8	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑄 ∈ 𝑋)
10		xmetcl 22136	. . . . . . . 8 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑄 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → (𝑄𝐷𝑥) ∈ ℝ^*)
11	7, 9, 6, 10	syl3anc 1326	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) ∈ ℝ^*)
12	11	adantr 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → (𝑄𝐷𝑥) ∈ ℝ^*)
13		xblss2.6	. . . . . . . . . 10 ⊢ (𝜑 → (𝑃𝐷𝑄) ∈ ℝ)
14	13	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑄) ∈ ℝ)
15	14	rexrd 10089	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑄) ∈ ℝ^*)
16	3	adantr 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑅 ∈ ℝ^*)
17	15, 16	xaddcld 12131	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ∈ ℝ^*)
18	17	adantr 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ∈ ℝ^*)
19		xblss2.5	. . . . . . 7 ⊢ (𝜑 → 𝑆 ∈ ℝ^*)
20	19	ad2antrr 762	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → 𝑆 ∈ ℝ^*)
21	2	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑃 ∈ 𝑋)
22		xmetcl 22136	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → (𝑃𝐷𝑥) ∈ ℝ^*)
23	7, 21, 6, 22	syl3anc 1326	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑥) ∈ ℝ^*)
24	15, 23	xaddcld 12131	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) ∈ ℝ^*)
25		xmettri2 22145	. . . . . . . . 9 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ (𝑃 ∈ 𝑋 ∧ 𝑄 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋)) → (𝑄𝐷𝑥) ≤ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)))
26	7, 21, 9, 6, 25	syl13anc 1328	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) ≤ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)))
27	5	simplbda 654	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑥) < 𝑅)
28		xltadd2 12087	. . . . . . . . . 10 ⊢ (((𝑃𝐷𝑥) ∈ ℝ^* ∧ 𝑅 ∈ ℝ^* ∧ (𝑃𝐷𝑄) ∈ ℝ) → ((𝑃𝐷𝑥) < 𝑅 ↔ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) < ((𝑃𝐷𝑄) +_𝑒 𝑅)))
29	23, 16, 14, 28	syl3anc 1326	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑥) < 𝑅 ↔ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) < ((𝑃𝐷𝑄) +_𝑒 𝑅)))
30	27, 29	mpbid 222	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) < ((𝑃𝐷𝑄) +_𝑒 𝑅))
31	11, 24, 17, 26, 30	xrlelttrd 11991	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) < ((𝑃𝐷𝑄) +_𝑒 𝑅))
32	31	adantr 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → (𝑄𝐷𝑥) < ((𝑃𝐷𝑄) +_𝑒 𝑅))
33	19	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑆 ∈ ℝ^*)
34	16	xnegcld 12130	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → -_𝑒𝑅 ∈ ℝ^*)
35	33, 34	xaddcld 12131	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑆 +_𝑒 -_𝑒𝑅) ∈ ℝ^*)
36		xblss2.7	. . . . . . . . . 10 ⊢ (𝜑 → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))
37	36	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))
38		xleadd1a 12083	. . . . . . . . 9 ⊢ ((((𝑃𝐷𝑄) ∈ ℝ^* ∧ (𝑆 +_𝑒 -_𝑒𝑅) ∈ ℝ^* ∧ 𝑅 ∈ ℝ^*) ∧ (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅)) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅))
39	15, 35, 16, 37, 38	syl31anc 1329	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅))
40	39	adantr 481	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅))
41		xnpcan 12082	. . . . . . . 8 ⊢ ((𝑆 ∈ ℝ^* ∧ 𝑅 ∈ ℝ) → ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅) = 𝑆)
42	33, 41	sylan 488	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅) = 𝑆)
43	40, 42	breqtrd 4679	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ 𝑆)
44	12, 18, 20, 32, 43	xrltletrd 11992	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → (𝑄𝐷𝑥) < 𝑆)
45	27	adantr 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃𝐷𝑥) < 𝑅)
46	36	ad2antrr 762	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))
47		0xr 10086	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℝ^*
48	47	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ∈ ℝ^*)
49		xmetge0 22149	. . . . . . . . . . . . . . . 16 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑄 ∈ 𝑋) → 0 ≤ (𝑃𝐷𝑄))
50	7, 21, 9, 49	syl3anc 1326	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ (𝑃𝐷𝑄))
51	48, 15, 35, 50, 37	xrletrd 11993	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ (𝑆 +_𝑒 -_𝑒𝑅))
52		ge0nemnf 12004	. . . . . . . . . . . . . 14 ⊢ (((𝑆 +_𝑒 -_𝑒𝑅) ∈ ℝ^* ∧ 0 ≤ (𝑆 +_𝑒 -_𝑒𝑅)) → (𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞)
53	35, 51, 52	syl2anc 693	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞)
54	53	adantr 481	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞)
55	19	ad2antrr 762	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑆 ∈ ℝ^*)
56		xaddmnf1 12059	. . . . . . . . . . . . . . . 16 ⊢ ((𝑆 ∈ ℝ^* ∧ 𝑆 ≠ +∞) → (𝑆 +_𝑒 -∞) = -∞)
57	56	ex 450	. . . . . . . . . . . . . . 15 ⊢ (𝑆 ∈ ℝ^* → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -∞) = -∞))
58	55, 57	syl 17	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -∞) = -∞))
59		simpr 477	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑅 = +∞)
60		xnegeq 12038	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑅 = +∞ → -_𝑒𝑅 = -_𝑒+∞)
61	59, 60	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → -_𝑒𝑅 = -_𝑒+∞)
62		xnegpnf 12040	. . . . . . . . . . . . . . . . 17 ⊢ -_𝑒+∞ = -∞
63	61, 62	syl6eq 2672	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → -_𝑒𝑅 = -∞)
64	63	oveq2d 6666	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 +_𝑒 -_𝑒𝑅) = (𝑆 +_𝑒 -∞))
65	64	eqeq1d 2624	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑆 +_𝑒 -_𝑒𝑅) = -∞ ↔ (𝑆 +_𝑒 -∞) = -∞))
66	58, 65	sylibrd 249	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -_𝑒𝑅) = -∞))
67	66	necon1d 2816	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞ → 𝑆 = +∞))
68	54, 67	mpd 15	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑆 = +∞)
69	68, 63	oveq12d 6668	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 +_𝑒 -_𝑒𝑅) = (+∞ +_𝑒 -∞))
70		pnfaddmnf 12061	. . . . . . . . . 10 ⊢ (+∞ +_𝑒 -∞) = 0
71	69, 70	syl6eq 2672	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 +_𝑒 -_𝑒𝑅) = 0)
72	46, 71	breqtrd 4679	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃𝐷𝑄) ≤ 0)
73	50	biantrud 528	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) ≤ 0 ↔ ((𝑃𝐷𝑄) ≤ 0 ∧ 0 ≤ (𝑃𝐷𝑄))))
74		xrletri3 11985	. . . . . . . . . . 11 ⊢ (((𝑃𝐷𝑄) ∈ ℝ^* ∧ 0 ∈ ℝ^*) → ((𝑃𝐷𝑄) = 0 ↔ ((𝑃𝐷𝑄) ≤ 0 ∧ 0 ≤ (𝑃𝐷𝑄))))
75	15, 47, 74	sylancl 694	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) = 0 ↔ ((𝑃𝐷𝑄) ≤ 0 ∧ 0 ≤ (𝑃𝐷𝑄))))
76		xmeteq0 22143	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑄 ∈ 𝑋) → ((𝑃𝐷𝑄) = 0 ↔ 𝑃 = 𝑄))
77	7, 21, 9, 76	syl3anc 1326	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) = 0 ↔ 𝑃 = 𝑄))
78	73, 75, 77	3bitr2d 296	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) ≤ 0 ↔ 𝑃 = 𝑄))
79	78	adantr 481	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑃𝐷𝑄) ≤ 0 ↔ 𝑃 = 𝑄))
80	72, 79	mpbid 222	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑃 = 𝑄)
81	80	oveq1d 6665	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃𝐷𝑥) = (𝑄𝐷𝑥))
82	59, 68	eqtr4d 2659	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑅 = 𝑆)
83	45, 81, 82	3brtr3d 4684	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑄𝐷𝑥) < 𝑆)
84		xmetge0 22149	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → 0 ≤ (𝑃𝐷𝑥))
85	7, 21, 6, 84	syl3anc 1326	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ (𝑃𝐷𝑥))
86	48, 23, 16, 85, 27	xrlelttrd 11991	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 < 𝑅)
87		xrltle 11982	. . . . . . . . . 10 ⊢ ((0 ∈ ℝ^* ∧ 𝑅 ∈ ℝ^*) → (0 < 𝑅 → 0 ≤ 𝑅))
88	47, 16, 87	sylancr 695	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (0 < 𝑅 → 0 ≤ 𝑅))
89	86, 88	mpd 15	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ 𝑅)
90		ge0nemnf 12004	. . . . . . . 8 ⊢ ((𝑅 ∈ ℝ^* ∧ 0 ≤ 𝑅) → 𝑅 ≠ -∞)
91	16, 89, 90	syl2anc 693	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑅 ≠ -∞)
92	16, 91	jca 554	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑅 ∈ ℝ^* ∧ 𝑅 ≠ -∞))
93		xrnemnf 11951	. . . . . 6 ⊢ ((𝑅 ∈ ℝ^* ∧ 𝑅 ≠ -∞) ↔ (𝑅 ∈ ℝ ∨ 𝑅 = +∞))
94	92, 93	sylib 208	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑅 ∈ ℝ ∨ 𝑅 = +∞))
95	44, 83, 94	mpjaodan 827	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) < 𝑆)
96		elbl 22193	. . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑄 ∈ 𝑋 ∧ 𝑆 ∈ ℝ^*) → (𝑥 ∈ (𝑄(ball‘𝐷)𝑆) ↔ (𝑥 ∈ 𝑋 ∧ (𝑄𝐷𝑥) < 𝑆)))
97	7, 9, 33, 96	syl3anc 1326	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑥 ∈ (𝑄(ball‘𝐷)𝑆) ↔ (𝑥 ∈ 𝑋 ∧ (𝑄𝐷𝑥) < 𝑆)))
98	6, 95, 97	mpbir2and 957	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑥 ∈ (𝑄(ball‘𝐷)𝑆))
99	98	ex 450	. 2 ⊢ (𝜑 → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) → 𝑥 ∈ (𝑄(ball‘𝐷)𝑆)))
100	99	ssrdv 3609	1 ⊢ (𝜑 → (𝑃(ball‘𝐷)𝑅) ⊆ (𝑄(ball‘𝐷)𝑆))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 196 ∨ wo 383 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ⊆ wss 3574 class class class wbr 4653 ‘cfv 5888 (class class class)co 6650 ℝcr 9935 0cc0 9936 +∞cpnf 10071 -∞cmnf 10072 ℝ^*cxr 10073 < clt 10074 ≤ cle 10075 -_𝑒cxne 11943 +_𝑒 cxad 11944 ∞Metcxmt 19731 ballcbl 19733

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-po 5035 df-so 5036 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-1st 7168 df-2nd 7169 df-er 7742 df-map 7859 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-2 11079 df-rp 11833 df-xneg 11946 df-xadd 11947 df-xmul 11948 df-psmet 19738 df-xmet 19739 df-bl 19741

This theorem is referenced by: blss2 22209 ssbl 22228

W3C validator