Theorem blssexps 15453

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 15451	. . . . . . 7 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥)
2		sstr 3256	. . . . . . . . 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 2651	. . . . . . 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 1234	. . . . 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 481	. . 3 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
9	8	rexlimdva 2668	. 2 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
10		simpll 531	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝐷 ∈ (PsMet‘𝑋))
11		simplr 533	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ 𝑋)
12		rpxr 10041	. . . . . 6 ⊢ (𝑟 ∈ ℝ+ → 𝑟 ∈ ℝ*)
13	12	ad2antrl 494	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ*)
14		blelrnps 15443	. . . . 5 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷))
15	10, 11, 13, 14	syl3anc 1278	. . . 4 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷))
16		simprl 535	. . . . 5 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ+)
17		blcntrps 15439	. . . . 5 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ+) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟))
18	10, 11, 16, 17	syl3anc 1278	. . . 4 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟))
19		simprr 537	. . . 4 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)
20		eleq2 2302	. . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑃 ∈ 𝑥 ↔ 𝑃 ∈ (𝑃(ball‘𝐷)𝑟)))
21		sseq1 3271	. . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑥 ⊆ 𝐴 ↔ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))
22	20, 21	anbi12d 477	. . . . 5 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ (𝑃 ∈ (𝑃(ball‘𝐷)𝑟) ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)))
23	22	rspcev 2929	. . . 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 1276	. . 3 ⊢ (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴))
25	24	rexlimdvaa 2669	. 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 1009   = wceq 1402   ∈ wcel 2209  ∃wrex 2529   ⊆ wss 3220  ran crn 4770  ‘cfv 5372  (class class class)co 6075  ℝ^*cxr 8349  ℝ⁺crp 10033  PsMetcpsmet 14844  ballcbl 14847

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-mulrcl 8268  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-precex 8279  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285  ax-pre-mulgt0 8286  ax-pre-mulext 8287  ax-arch 8288

This theorem depends on definitions:  df-bi 117  df-stab 843  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-po 4436  df-iso 4437  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-map 6914  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-reap 8893  df-ap 8900  df-div 8993  df-inn 9284  df-2 9342  df-n0 9543  df-z 9624  df-uz 9901  df-q 9999  df-rp 10034  df-xneg 10153  df-xadd 10154  df-psmet 14852  df-bl 14855

This theorem is referenced by: (None)