Theorem blssexps 15152

Description: Two ways to express the existence of a ball subset. (Contributed by NM, 5-May-2007.) (Revised by Mario Carneiro, 12-Nov-2013.) (Revised by Thierry Arnoux, 11-Mar-2018.)

Assertion

Ref	Expression
blssexps	⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))

Distinct variable groups:   𝑥,𝑟,𝐴   𝐷,𝑟,𝑥   𝑃,𝑟,𝑥   𝑋,𝑟,𝑥

Proof of Theorem blssexps

Step	Hyp	Ref	Expression
1		blssps 15150	. . . . . . 7 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥)
2		sstr 3235	. . . . . . . . 9 ⊢ (((𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 ∧ 𝑥 ⊆ 𝐴) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)
3	2	expcom 116	. . . . . . . 8 ⊢ (𝑥 ⊆ 𝐴 → ((𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
4	3	reximdv 2633	. . . . . . 7 ⊢ (𝑥 ⊆ 𝐴 → (∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
5	1, 4	syl5com 29	. . . . . 6 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → (𝑥 ⊆ 𝐴 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
6	5	3expa 1229	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) ∧ 𝑃 ∈ 𝑥) → (𝑥 ⊆ 𝐴 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
7	6	expimpd 363	. . . 4 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
8	7	adantlr 477	. . 3 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
9	8	rexlimdva 2650	. 2 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
10		simpll 527	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝐷 ∈ (PsMet‘𝑋))
11		simplr 529	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ 𝑋)
12		rpxr 9895	. . . . . 6 ⊢ (𝑟 ∈ ℝ+ → 𝑟 ∈ ℝ*)
13	12	ad2antrl 490	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ*)
14		blelrnps 15142	. . . . 5 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷))
15	10, 11, 13, 14	syl3anc 1273	. . . 4 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷))
16		simprl 531	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ+)
17		blcntrps 15138	. . . . 5 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ+) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟))
18	10, 11, 16, 17	syl3anc 1273	. . . 4 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟))
19		simprr 533	. . . 4 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)
20		eleq2 2295	. . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑃 ∈ 𝑥 ↔ 𝑃 ∈ (𝑃(ball‘𝐷)𝑟)))
21		sseq1 3250	. . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑥 ⊆ 𝐴 ↔ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
22	20, 21	anbi12d 473	. . . . 5 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ (𝑃 ∈ (𝑃(ball‘𝐷)𝑟) ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)))
23	22	rspcev 2910	. . . 4 ⊢ (((𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷) ∧ (𝑃 ∈ (𝑃(ball‘𝐷)𝑟) ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴))
24	15, 18, 19, 23	syl12anc 1271	. . 3 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴))
25	24	rexlimdvaa 2651	. 2 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴 → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴)))
26	9, 25	impbid 129	1 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   ∧ w3a 1004   = wceq 1397   ∈ wcel 2202  ∃wrex 2511   ⊆ wss 3200  ran crn 4726  ‘cfv 5326  (class class class)co 6017  ℝ^*cxr 8212  ℝ⁺crp 9887  PsMetcpsmet 14548  ballcbl 14551

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-mulrcl 8130  ax-addcom 8131  ax-mulcom 8132  ax-addass 8133  ax-mulass 8134  ax-distr 8135  ax-i2m1 8136  ax-0lt1 8137  ax-1rid 8138  ax-0id 8139  ax-rnegex 8140  ax-precex 8141  ax-cnre 8142  ax-pre-ltirr 8143  ax-pre-ltwlin 8144  ax-pre-lttrn 8145  ax-pre-apti 8146  ax-pre-ltadd 8147  ax-pre-mulgt0 8148  ax-pre-mulext 8149  ax-arch 8150

This theorem depends on definitions:  df-bi 117  df-stab 838  df-dc 842  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rmo 2518  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-if 3606  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-po 4393  df-iso 4394  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-1st 6302  df-2nd 6303  df-map 6818  df-pnf 8215  df-mnf 8216  df-xr 8217  df-ltxr 8218  df-le 8219  df-sub 8351  df-neg 8352  df-reap 8754  df-ap 8761  df-div 8852  df-inn 9143  df-2 9201  df-n0 9402  df-z 9479  df-uz 9755  df-q 9853  df-rp 9888  df-xneg 10006  df-xadd 10007  df-psmet 14556  df-bl 14559

This theorem is referenced by: (None)