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Theorem xblss2ps 12562

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 12565 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.) (Revised by Thierry Arnoux, 11-Mar-2018.)

**Hypotheses**
Ref	Expression
xblss2ps.1	⊢ (𝜑 → 𝐷 ∈ (PsMet‘𝑋))
xblss2ps.2	⊢ (𝜑 → 𝑃 ∈ 𝑋)
xblss2ps.3	⊢ (𝜑 → 𝑄 ∈ 𝑋)
xblss2ps.4	⊢ (𝜑 → 𝑅 ∈ ℝ^*)
xblss2ps.5	⊢ (𝜑 → 𝑆 ∈ ℝ^*)
xblss2ps.6	⊢ (𝜑 → (𝑃𝐷𝑄) ∈ ℝ)
xblss2ps.7	⊢ (𝜑 → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))

**Assertion**
Ref	Expression
xblss2ps	⊢ (𝜑 → (𝑃(ball‘𝐷)𝑅) ⊆ (𝑄(ball‘𝐷)𝑆))

Proof of Theorem xblss2ps Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		xblss2ps.1	. . . . . 6 ⊢ (𝜑 → 𝐷 ∈ (PsMet‘𝑋))
2		xblss2ps.2	. . . . . 6 ⊢ (𝜑 → 𝑃 ∈ 𝑋)
3		xblss2ps.4	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ ℝ^*)
4		elblps 12548	. . . . . 6 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ^*) → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
5	1, 2, 3, 4	syl3anc 1216	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
6	5	simprbda 380	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑥 ∈ 𝑋)
7	1	adantr 274	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝐷 ∈ (PsMet‘𝑋))
8		xblss2ps.3	. . . . . . . . 9 ⊢ (𝜑 → 𝑄 ∈ 𝑋)
9	8	adantr 274	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑄 ∈ 𝑋)
10		psmetcl 12484	. . . . . . . 8 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑄 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → (𝑄𝐷𝑥) ∈ ℝ^*)
11	7, 9, 6, 10	syl3anc 1216	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) ∈ ℝ^*)
12	11	adantr 274	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → (𝑄𝐷𝑥) ∈ ℝ^*)
13		xblss2ps.6	. . . . . . . . . 10 ⊢ (𝜑 → (𝑃𝐷𝑄) ∈ ℝ)
14	13	adantr 274	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑄) ∈ ℝ)
15	14	rexrd 7808	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑄) ∈ ℝ^*)
16	3	adantr 274	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑅 ∈ ℝ^*)
17	15, 16	xaddcld 9660	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ∈ ℝ^*)
18	17	adantr 274	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ∈ ℝ^*)
19		xblss2ps.5	. . . . . . 7 ⊢ (𝜑 → 𝑆 ∈ ℝ^*)
20	19	ad2antrr 479	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → 𝑆 ∈ ℝ^*)
21	2	adantr 274	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑃 ∈ 𝑋)
22		psmetcl 12484	. . . . . . . . . 10 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → (𝑃𝐷𝑥) ∈ ℝ^*)
23	7, 21, 6, 22	syl3anc 1216	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑥) ∈ ℝ^*)
24	15, 23	xaddcld 9660	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) ∈ ℝ^*)
25		psmettri2 12486	. . . . . . . . 9 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ (𝑃 ∈ 𝑋 ∧ 𝑄 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋)) → (𝑄𝐷𝑥) ≤ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)))
26	7, 21, 9, 6, 25	syl13anc 1218	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) ≤ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)))
27	5	simplbda 381	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑥) < 𝑅)
28		xltadd2 9653	. . . . . . . . . 10 ⊢ (((𝑃𝐷𝑥) ∈ ℝ^* ∧ 𝑅 ∈ ℝ^* ∧ (𝑃𝐷𝑄) ∈ ℝ) → ((𝑃𝐷𝑥) < 𝑅 ↔ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) < ((𝑃𝐷𝑄) +_𝑒 𝑅)))
29	23, 16, 14, 28	syl3anc 1216	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑥) < 𝑅 ↔ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) < ((𝑃𝐷𝑄) +_𝑒 𝑅)))
30	27, 29	mpbid 146	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) < ((𝑃𝐷𝑄) +_𝑒 𝑅))
31	11, 24, 17, 26, 30	xrlelttrd 9586	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) < ((𝑃𝐷𝑄) +_𝑒 𝑅))
32	31	adantr 274	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → (𝑄𝐷𝑥) < ((𝑃𝐷𝑄) +_𝑒 𝑅))
33	19	adantr 274	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑆 ∈ ℝ^*)
34	16	xnegcld 9631	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → -_𝑒𝑅 ∈ ℝ^*)
35	33, 34	xaddcld 9660	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑆 +_𝑒 -_𝑒𝑅) ∈ ℝ^*)
36		xblss2ps.7	. . . . . . . . . 10 ⊢ (𝜑 → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))
37	36	adantr 274	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑃𝐷𝑄) ≤ (𝑆 +_𝑒 -_𝑒𝑅))
38		xleadd1a 9649	. . . . . . . . 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 1219	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅))
40	39	adantr 274	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅))
41		xnpcan 9648	. . . . . . . 8 ⊢ ((𝑆 ∈ ℝ^* ∧ 𝑅 ∈ ℝ) → ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅) = 𝑆)
42	33, 41	sylan 281	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑆 +_𝑒 -_𝑒𝑅) +_𝑒 𝑅) = 𝑆)
43	40, 42	breqtrd 3949	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → ((𝑃𝐷𝑄) +_𝑒 𝑅) ≤ 𝑆)
44	12, 18, 20, 32, 43	xrltletrd 9587	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 ∈ ℝ) → (𝑄𝐷𝑥) < 𝑆)
45	11	adantr 274	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑄𝐷𝑥) ∈ ℝ^*)
46	13	ad2antrr 479	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃𝐷𝑄) ∈ ℝ)
47		simpll 518	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝜑)
48		simplr 519	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑥 ∈ (𝑃(ball‘𝐷)𝑅))
49		simpr 109	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑅 = +∞)
50	49	oveq2d 5783	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃(ball‘𝐷)𝑅) = (𝑃(ball‘𝐷)+∞))
51	48, 50	eleqtrd 2216	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑥 ∈ (𝑃(ball‘𝐷)+∞))
52		xblpnfps 12556	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ (𝑃(ball‘𝐷)+∞) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ)))
53	1, 2, 52	syl2anc 408	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑥 ∈ (𝑃(ball‘𝐷)+∞) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ)))
54	53	simplbda 381	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)+∞)) → (𝑃𝐷𝑥) ∈ ℝ)
55	47, 51, 54	syl2anc 408	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑃𝐷𝑥) ∈ ℝ)
56	46, 55	readdcld 7788	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑃𝐷𝑄) + (𝑃𝐷𝑥)) ∈ ℝ)
57	56	rexrd 7808	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑃𝐷𝑄) + (𝑃𝐷𝑥)) ∈ ℝ^*)
58		pnfxr 7811	. . . . . . . 8 ⊢ +∞ ∈ ℝ^*
59	58	a1i 9	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → +∞ ∈ ℝ^*)
60	1	ad2antrr 479	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝐷 ∈ (PsMet‘𝑋))
61	2	ad2antrr 479	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑃 ∈ 𝑋)
62	8	ad2antrr 479	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑄 ∈ 𝑋)
63	6	adantr 274	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑥 ∈ 𝑋)
64	60, 61, 62, 63, 25	syl13anc 1218	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑄𝐷𝑥) ≤ ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)))
65	46, 55	rexaddd 9630	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑃𝐷𝑄) +_𝑒 (𝑃𝐷𝑥)) = ((𝑃𝐷𝑄) + (𝑃𝐷𝑥)))
66	64, 65	breqtrd 3949	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑄𝐷𝑥) ≤ ((𝑃𝐷𝑄) + (𝑃𝐷𝑥)))
67		ltpnf 9560	. . . . . . . 8 ⊢ (((𝑃𝐷𝑄) + (𝑃𝐷𝑥)) ∈ ℝ → ((𝑃𝐷𝑄) + (𝑃𝐷𝑥)) < +∞)
68	56, 67	syl 14	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑃𝐷𝑄) + (𝑃𝐷𝑥)) < +∞)
69	45, 57, 59, 66, 68	xrlelttrd 9586	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑄𝐷𝑥) < +∞)
70	19	ad2antrr 479	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑆 ∈ ℝ^*)
71		xrpnfdc 9618	. . . . . . . 8 ⊢ (𝑆 ∈ ℝ^* → DECID 𝑆 = +∞)
72	70, 71	syl 14	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → DECID 𝑆 = +∞)
73		0xr 7805	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ^*
74	73	a1i 9	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ∈ ℝ^*)
75		psmetge0 12489	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑄 ∈ 𝑋) → 0 ≤ (𝑃𝐷𝑄))
76	7, 21, 9, 75	syl3anc 1216	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ (𝑃𝐷𝑄))
77	74, 15, 35, 76, 37	xrletrd 9588	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ (𝑆 +_𝑒 -_𝑒𝑅))
78		ge0nemnf 9600	. . . . . . . . 9 ⊢ (((𝑆 +_𝑒 -_𝑒𝑅) ∈ ℝ^* ∧ 0 ≤ (𝑆 +_𝑒 -_𝑒𝑅)) → (𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞)
79	35, 77, 78	syl2anc 408	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞)
80	79	adantr 274	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞)
81		xaddmnf1 9624	. . . . . . . . . . . 12 ⊢ ((𝑆 ∈ ℝ^* ∧ 𝑆 ≠ +∞) → (𝑆 +_𝑒 -∞) = -∞)
82	81	ex 114	. . . . . . . . . . 11 ⊢ (𝑆 ∈ ℝ^* → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -∞) = -∞))
83	70, 82	syl 14	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -∞) = -∞))
84		xnegeq 9603	. . . . . . . . . . . . . 14 ⊢ (𝑅 = +∞ → -_𝑒𝑅 = -_𝑒+∞)
85	49, 84	syl 14	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → -_𝑒𝑅 = -_𝑒+∞)
86		xnegpnf 9604	. . . . . . . . . . . . 13 ⊢ -_𝑒+∞ = -∞
87	85, 86	syl6eq 2186	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → -_𝑒𝑅 = -∞)
88	87	oveq2d 5783	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 +_𝑒 -_𝑒𝑅) = (𝑆 +_𝑒 -∞))
89	88	eqeq1d 2146	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → ((𝑆 +_𝑒 -_𝑒𝑅) = -∞ ↔ (𝑆 +_𝑒 -∞) = -∞))
90	83, 89	sylibrd 168	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -_𝑒𝑅) = -∞))
91	90	a1d 22	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (DECID 𝑆 = +∞ → (𝑆 ≠ +∞ → (𝑆 +_𝑒 -_𝑒𝑅) = -∞)))
92	91	necon1ddc 2384	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (DECID 𝑆 = +∞ → ((𝑆 +_𝑒 -_𝑒𝑅) ≠ -∞ → 𝑆 = +∞)))
93	72, 80, 92	mp2d 47	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → 𝑆 = +∞)
94	69, 93	breqtrrd 3951	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) ∧ 𝑅 = +∞) → (𝑄𝐷𝑥) < 𝑆)
95		psmetge0 12489	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → 0 ≤ (𝑃𝐷𝑥))
96	7, 21, 6, 95	syl3anc 1216	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ (𝑃𝐷𝑥))
97	74, 23, 16, 96, 27	xrlelttrd 9586	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 < 𝑅)
98	74, 16, 97	xrltled 9578	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 0 ≤ 𝑅)
99		ge0nemnf 9600	. . . . . . . 8 ⊢ ((𝑅 ∈ ℝ^* ∧ 0 ≤ 𝑅) → 𝑅 ≠ -∞)
100	16, 98, 99	syl2anc 408	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑅 ≠ -∞)
101	16, 100	jca 304	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑅 ∈ ℝ^* ∧ 𝑅 ≠ -∞))
102		xrnemnf 9557	. . . . . 6 ⊢ ((𝑅 ∈ ℝ^* ∧ 𝑅 ≠ -∞) ↔ (𝑅 ∈ ℝ ∨ 𝑅 = +∞))
103	101, 102	sylib 121	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑅 ∈ ℝ ∨ 𝑅 = +∞))
104	44, 94, 103	mpjaodan 787	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑄𝐷𝑥) < 𝑆)
105		elblps 12548	. . . . 5 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑄 ∈ 𝑋 ∧ 𝑆 ∈ ℝ^*) → (𝑥 ∈ (𝑄(ball‘𝐷)𝑆) ↔ (𝑥 ∈ 𝑋 ∧ (𝑄𝐷𝑥) < 𝑆)))
106	7, 9, 33, 105	syl3anc 1216	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → (𝑥 ∈ (𝑄(ball‘𝐷)𝑆) ↔ (𝑥 ∈ 𝑋 ∧ (𝑄𝐷𝑥) < 𝑆)))
107	6, 104, 106	mpbir2and 928	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑃(ball‘𝐷)𝑅)) → 𝑥 ∈ (𝑄(ball‘𝐷)𝑆))
108	107	ex 114	. 2 ⊢ (𝜑 → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) → 𝑥 ∈ (𝑄(ball‘𝐷)𝑆)))
109	108	ssrdv 3098	1 ⊢ (𝜑 → (𝑃(ball‘𝐷)𝑅) ⊆ (𝑄(ball‘𝐷)𝑆))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∨ wo 697 DECID wdc 819 = wceq 1331 ∈ wcel 1480 ≠ wne 2306 ⊆ wss 3066 class class class wbr 3924 ‘cfv 5118 (class class class)co 5767 ℝcr 7612 0cc0 7613 + caddc 7616 +∞cpnf 7790 -∞cmnf 7791 ℝ^*cxr 7792 < clt 7793 ≤ cle 7794 -_𝑒cxne 9549 +_𝑒 cxad 9550 PsMetcpsmet 12137 ballcbl 12140

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 ax-setind 4447 ax-cnex 7704 ax-resscn 7705 ax-1cn 7706 ax-1re 7707 ax-icn 7708 ax-addcl 7709 ax-addrcl 7710 ax-mulcl 7711 ax-mulrcl 7712 ax-addcom 7713 ax-mulcom 7714 ax-addass 7715 ax-mulass 7716 ax-distr 7717 ax-i2m1 7718 ax-0lt1 7719 ax-1rid 7720 ax-0id 7721 ax-rnegex 7722 ax-precex 7723 ax-cnre 7724 ax-pre-ltirr 7725 ax-pre-ltwlin 7726 ax-pre-lttrn 7727 ax-pre-apti 7728 ax-pre-ltadd 7729 ax-pre-mulgt0 7730

This theorem depends on definitions: df-bi 116 df-stab 816 df-dc 820 df-3or 963 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-ral 2419 df-rex 2420 df-reu 2421 df-rab 2423 df-v 2683 df-sbc 2905 df-csb 2999 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-if 3470 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-iun 3810 df-br 3925 df-opab 3985 df-mpt 3986 df-id 4210 df-po 4213 df-iso 4214 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-res 4546 df-ima 4547 df-iota 5083 df-fun 5120 df-fn 5121 df-f 5122 df-fv 5126 df-riota 5723 df-ov 5770 df-oprab 5771 df-mpo 5772 df-1st 6031 df-2nd 6032 df-map 6537 df-pnf 7795 df-mnf 7796 df-xr 7797 df-ltxr 7798 df-le 7799 df-sub 7928 df-neg 7929 df-2 8772 df-xneg 9552 df-xadd 9553 df-psmet 12145 df-bl 12148

This theorem is referenced by: blss2ps 12564 ssblps 12583

W3C validator