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Theorem blssps 22951
Description: Any point 𝑃 in a ball 𝐵 can be centered in another ball that is a subset of 𝐵. (Contributed by NM, 31-Aug-2006.) (Revised by Mario Carneiro, 24-Aug-2015.) (Revised by Thierry Arnoux, 11-Mar-2018.)
Assertion
Ref Expression
blssps ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐵 ∈ ran (ball‘𝐷) ∧ 𝑃𝐵) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵)
Distinct variable groups:   𝑥,𝐵   𝑥,𝐷   𝑥,𝑃   𝑥,𝑋

Proof of Theorem blssps
Dummy variables 𝑟 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 blrnps 22935 . . 3 (𝐷 ∈ (PsMet‘𝑋) → (𝐵 ∈ ran (ball‘𝐷) ↔ ∃𝑦𝑋𝑟 ∈ ℝ* 𝐵 = (𝑦(ball‘𝐷)𝑟)))
2 elblps 22914 . . . . . . 7 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) → (𝑃 ∈ (𝑦(ball‘𝐷)𝑟) ↔ (𝑃𝑋 ∧ (𝑦𝐷𝑃) < 𝑟)))
3 simpl1 1185 . . . . . . . . . . 11 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → 𝐷 ∈ (PsMet‘𝑋))
4 simpl2 1186 . . . . . . . . . . 11 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → 𝑦𝑋)
5 simpr 485 . . . . . . . . . . 11 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → 𝑃𝑋)
6 psmetcl 22834 . . . . . . . . . . 11 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑃𝑋) → (𝑦𝐷𝑃) ∈ ℝ*)
73, 4, 5, 6syl3anc 1365 . . . . . . . . . 10 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → (𝑦𝐷𝑃) ∈ ℝ*)
8 simpl3 1187 . . . . . . . . . 10 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → 𝑟 ∈ ℝ*)
9 qbtwnxr 12586 . . . . . . . . . . 11 (((𝑦𝐷𝑃) ∈ ℝ*𝑟 ∈ ℝ* ∧ (𝑦𝐷𝑃) < 𝑟) → ∃𝑧 ∈ ℚ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))
1093expia 1115 . . . . . . . . . 10 (((𝑦𝐷𝑃) ∈ ℝ*𝑟 ∈ ℝ*) → ((𝑦𝐷𝑃) < 𝑟 → ∃𝑧 ∈ ℚ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟)))
117, 8, 10syl2anc 584 . . . . . . . . 9 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → ((𝑦𝐷𝑃) < 𝑟 → ∃𝑧 ∈ ℚ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟)))
12 qre 12345 . . . . . . . . . . 11 (𝑧 ∈ ℚ → 𝑧 ∈ ℝ)
13 simpll1 1206 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝐷 ∈ (PsMet‘𝑋))
14 simplr 765 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑃𝑋)
15 simpll2 1207 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑦𝑋)
16 psmetsym 22837 . . . . . . . . . . . . . . . 16 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃𝑋𝑦𝑋) → (𝑃𝐷𝑦) = (𝑦𝐷𝑃))
1713, 14, 15, 16syl3anc 1365 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) = (𝑦𝐷𝑃))
18 simprrl 777 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑦𝐷𝑃) < 𝑧)
1917, 18eqbrtrd 5084 . . . . . . . . . . . . . 14 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) < 𝑧)
20 simprl 767 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑧 ∈ ℝ)
21 psmetcl 22834 . . . . . . . . . . . . . . . . . 18 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃𝑋𝑦𝑋) → (𝑃𝐷𝑦) ∈ ℝ*)
2213, 14, 15, 21syl3anc 1365 . . . . . . . . . . . . . . . . 17 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) ∈ ℝ*)
23 rexr 10679 . . . . . . . . . . . . . . . . . 18 (𝑧 ∈ ℝ → 𝑧 ∈ ℝ*)
2423ad2antrl 724 . . . . . . . . . . . . . . . . 17 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑧 ∈ ℝ*)
2522, 24, 19xrltled 12536 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) ≤ 𝑧)
26 psmetlecl 22842 . . . . . . . . . . . . . . . 16 ((𝐷 ∈ (PsMet‘𝑋) ∧ (𝑃𝑋𝑦𝑋) ∧ (𝑧 ∈ ℝ ∧ (𝑃𝐷𝑦) ≤ 𝑧)) → (𝑃𝐷𝑦) ∈ ℝ)
2713, 14, 15, 20, 25, 26syl122anc 1373 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) ∈ ℝ)
28 difrp 12420 . . . . . . . . . . . . . . 15 (((𝑃𝐷𝑦) ∈ ℝ ∧ 𝑧 ∈ ℝ) → ((𝑃𝐷𝑦) < 𝑧 ↔ (𝑧 − (𝑃𝐷𝑦)) ∈ ℝ+))
2927, 20, 28syl2anc 584 . . . . . . . . . . . . . 14 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → ((𝑃𝐷𝑦) < 𝑧 ↔ (𝑧 − (𝑃𝐷𝑦)) ∈ ℝ+))
3019, 29mpbid 233 . . . . . . . . . . . . 13 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑧 − (𝑃𝐷𝑦)) ∈ ℝ+)
3120, 27resubcld 11060 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑧 − (𝑃𝐷𝑦)) ∈ ℝ)
3222xrleidd 12538 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) ≤ (𝑃𝐷𝑦))
3320recnd 10661 . . . . . . . . . . . . . . . . 17 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑧 ∈ ℂ)
3427recnd 10661 . . . . . . . . . . . . . . . . 17 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) ∈ ℂ)
3533, 34nncand 10994 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑧 − (𝑧 − (𝑃𝐷𝑦))) = (𝑃𝐷𝑦))
3632, 35breqtrrd 5090 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃𝐷𝑦) ≤ (𝑧 − (𝑧 − (𝑃𝐷𝑦))))
37 blss2ps 22930 . . . . . . . . . . . . . . 15 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃𝑋𝑦𝑋) ∧ ((𝑧 − (𝑃𝐷𝑦)) ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (𝑃𝐷𝑦) ≤ (𝑧 − (𝑧 − (𝑃𝐷𝑦))))) → (𝑃(ball‘𝐷)(𝑧 − (𝑃𝐷𝑦))) ⊆ (𝑦(ball‘𝐷)𝑧))
3813, 14, 15, 31, 20, 36, 37syl33anc 1379 . . . . . . . . . . . . . 14 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃(ball‘𝐷)(𝑧 − (𝑃𝐷𝑦))) ⊆ (𝑦(ball‘𝐷)𝑧))
39 simpll3 1208 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑟 ∈ ℝ*)
40 simprrr 778 . . . . . . . . . . . . . . . 16 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑧 < 𝑟)
4124, 39, 40xrltled 12536 . . . . . . . . . . . . . . 15 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → 𝑧𝑟)
42 ssblps 22949 . . . . . . . . . . . . . . 15 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋) ∧ (𝑧 ∈ ℝ*𝑟 ∈ ℝ*) ∧ 𝑧𝑟) → (𝑦(ball‘𝐷)𝑧) ⊆ (𝑦(ball‘𝐷)𝑟))
4313, 15, 24, 39, 41, 42syl221anc 1375 . . . . . . . . . . . . . 14 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑦(ball‘𝐷)𝑧) ⊆ (𝑦(ball‘𝐷)𝑟))
4438, 43sstrd 3980 . . . . . . . . . . . . 13 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → (𝑃(ball‘𝐷)(𝑧 − (𝑃𝐷𝑦))) ⊆ (𝑦(ball‘𝐷)𝑟))
45 oveq2 7159 . . . . . . . . . . . . . . 15 (𝑥 = (𝑧 − (𝑃𝐷𝑦)) → (𝑃(ball‘𝐷)𝑥) = (𝑃(ball‘𝐷)(𝑧 − (𝑃𝐷𝑦))))
4645sseq1d 4001 . . . . . . . . . . . . . 14 (𝑥 = (𝑧 − (𝑃𝐷𝑦)) → ((𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟) ↔ (𝑃(ball‘𝐷)(𝑧 − (𝑃𝐷𝑦))) ⊆ (𝑦(ball‘𝐷)𝑟)))
4746rspcev 3626 . . . . . . . . . . . . 13 (((𝑧 − (𝑃𝐷𝑦)) ∈ ℝ+ ∧ (𝑃(ball‘𝐷)(𝑧 − (𝑃𝐷𝑦))) ⊆ (𝑦(ball‘𝐷)𝑟)) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟))
4830, 44, 47syl2anc 584 . . . . . . . . . . . 12 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ (𝑧 ∈ ℝ ∧ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟))) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟))
4948expr 457 . . . . . . . . . . 11 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ 𝑧 ∈ ℝ) → (((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
5012, 49sylan2 592 . . . . . . . . . 10 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) ∧ 𝑧 ∈ ℚ) → (((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
5150rexlimdva 3288 . . . . . . . . 9 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → (∃𝑧 ∈ ℚ ((𝑦𝐷𝑃) < 𝑧𝑧 < 𝑟) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
5211, 51syld 47 . . . . . . . 8 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) ∧ 𝑃𝑋) → ((𝑦𝐷𝑃) < 𝑟 → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
5352expimpd 454 . . . . . . 7 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) → ((𝑃𝑋 ∧ (𝑦𝐷𝑃) < 𝑟) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
542, 53sylbid 241 . . . . . 6 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) → (𝑃 ∈ (𝑦(ball‘𝐷)𝑟) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
55 eleq2 2905 . . . . . . 7 (𝐵 = (𝑦(ball‘𝐷)𝑟) → (𝑃𝐵𝑃 ∈ (𝑦(ball‘𝐷)𝑟)))
56 sseq2 3996 . . . . . . . 8 (𝐵 = (𝑦(ball‘𝐷)𝑟) → ((𝑃(ball‘𝐷)𝑥) ⊆ 𝐵 ↔ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
5756rexbidv 3301 . . . . . . 7 (𝐵 = (𝑦(ball‘𝐷)𝑟) → (∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵 ↔ ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟)))
5855, 57imbi12d 346 . . . . . 6 (𝐵 = (𝑦(ball‘𝐷)𝑟) → ((𝑃𝐵 → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵) ↔ (𝑃 ∈ (𝑦(ball‘𝐷)𝑟) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ (𝑦(ball‘𝐷)𝑟))))
5954, 58syl5ibrcom 248 . . . . 5 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑦𝑋𝑟 ∈ ℝ*) → (𝐵 = (𝑦(ball‘𝐷)𝑟) → (𝑃𝐵 → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵)))
60593expib 1116 . . . 4 (𝐷 ∈ (PsMet‘𝑋) → ((𝑦𝑋𝑟 ∈ ℝ*) → (𝐵 = (𝑦(ball‘𝐷)𝑟) → (𝑃𝐵 → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵))))
6160rexlimdvv 3297 . . 3 (𝐷 ∈ (PsMet‘𝑋) → (∃𝑦𝑋𝑟 ∈ ℝ* 𝐵 = (𝑦(ball‘𝐷)𝑟) → (𝑃𝐵 → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵)))
621, 61sylbid 241 . 2 (𝐷 ∈ (PsMet‘𝑋) → (𝐵 ∈ ran (ball‘𝐷) → (𝑃𝐵 → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵)))
63623imp 1105 1 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐵 ∈ ran (ball‘𝐷) ∧ 𝑃𝐵) → ∃𝑥 ∈ ℝ+ (𝑃(ball‘𝐷)𝑥) ⊆ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396  w3a 1081   = wceq 1530  wcel 2107  wrex 3143  wss 3939   class class class wbr 5062  ran crn 5554  cfv 6351  (class class class)co 7151  cr 10528  *cxr 10666   < clt 10667  cle 10668  cmin 10862  cq 12340  +crp 12382  PsMetcpsmet 20447  ballcbl 20450
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2797  ax-sep 5199  ax-nul 5206  ax-pow 5262  ax-pr 5325  ax-un 7454  ax-cnex 10585  ax-resscn 10586  ax-1cn 10587  ax-icn 10588  ax-addcl 10589  ax-addrcl 10590  ax-mulcl 10591  ax-mulrcl 10592  ax-mulcom 10593  ax-addass 10594  ax-mulass 10595  ax-distr 10596  ax-i2m1 10597  ax-1ne0 10598  ax-1rid 10599  ax-rnegex 10600  ax-rrecex 10601  ax-cnre 10602  ax-pre-lttri 10603  ax-pre-lttrn 10604  ax-pre-ltadd 10605  ax-pre-mulgt0 10606  ax-pre-sup 10607
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2619  df-eu 2651  df-clab 2804  df-cleq 2818  df-clel 2897  df-nfc 2967  df-ne 3021  df-nel 3128  df-ral 3147  df-rex 3148  df-reu 3149  df-rmo 3150  df-rab 3151  df-v 3501  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-pss 3957  df-nul 4295  df-if 4470  df-pw 4543  df-sn 4564  df-pr 4566  df-tp 4568  df-op 4570  df-uni 4837  df-iun 4918  df-br 5063  df-opab 5125  df-mpt 5143  df-tr 5169  df-id 5458  df-eprel 5463  df-po 5472  df-so 5473  df-fr 5512  df-we 5514  df-xp 5559  df-rel 5560  df-cnv 5561  df-co 5562  df-dm 5563  df-rn 5564  df-res 5565  df-ima 5566  df-pred 6145  df-ord 6191  df-on 6192  df-lim 6193  df-suc 6194  df-iota 6311  df-fun 6353  df-fn 6354  df-f 6355  df-f1 6356  df-fo 6357  df-f1o 6358  df-fv 6359  df-riota 7109  df-ov 7154  df-oprab 7155  df-mpo 7156  df-om 7572  df-1st 7683  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-rdg 8040  df-er 8282  df-map 8401  df-en 8502  df-dom 8503  df-sdom 8504  df-sup 8898  df-inf 8899  df-pnf 10669  df-mnf 10670  df-xr 10671  df-ltxr 10672  df-le 10673  df-sub 10864  df-neg 10865  df-div 11290  df-nn 11631  df-2 11692  df-n0 11890  df-z 11974  df-uz 12236  df-q 12341  df-rp 12383  df-xneg 12500  df-xadd 12501  df-xmul 12502  df-psmet 20455  df-bl 20458
This theorem is referenced by:  blssexps  22953
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