Theorem blres 23035

Description: A ball in a restricted metric space. (Contributed by Mario Carneiro, 5-Jan-2014.)

Hypothesis

Ref	Expression
blres.2	⊢ 𝐶 = (𝐷 ↾ (𝑌 × 𝑌))

Assertion

Ref	Expression
blres	⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐶)𝑅) = ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌))

Proof of Theorem blres

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elinel2 4173	. . . . . . . . 9 ⊢ (𝑃 ∈ (𝑋 ∩ 𝑌) → 𝑃 ∈ 𝑌)
2		blres.2	. . . . . . . . . . 11 ⊢ 𝐶 = (𝐷 ↾ (𝑌 × 𝑌))
3	2	oveqi 7163	. . . . . . . . . 10 ⊢ (𝑃𝐶𝑥) = (𝑃(𝐷 ↾ (𝑌 × 𝑌))𝑥)
4		ovres 7308	. . . . . . . . . 10 ⊢ ((𝑃 ∈ 𝑌 ∧ 𝑥 ∈ 𝑌) → (𝑃(𝐷 ↾ (𝑌 × 𝑌))𝑥) = (𝑃𝐷𝑥))
5	3, 4	syl5eq 2868	. . . . . . . . 9 ⊢ ((𝑃 ∈ 𝑌 ∧ 𝑥 ∈ 𝑌) → (𝑃𝐶𝑥) = (𝑃𝐷𝑥))
6	1, 5	sylan 582	. . . . . . . 8 ⊢ ((𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑥 ∈ 𝑌) → (𝑃𝐶𝑥) = (𝑃𝐷𝑥))
7	6	breq1d 5069	. . . . . . 7 ⊢ ((𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑥 ∈ 𝑌) → ((𝑃𝐶𝑥) < 𝑅 ↔ (𝑃𝐷𝑥) < 𝑅))
8	7	anbi2d 630	. . . . . 6 ⊢ ((𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑥 ∈ 𝑌) → ((𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
9	8	pm5.32da 581	. . . . 5 ⊢ (𝑃 ∈ (𝑋 ∩ 𝑌) → ((𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅))))
10	9	3ad2ant2 1130	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → ((𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅))))
11		elin 4169	. . . . . . 7 ⊢ (𝑥 ∈ (𝑋 ∩ 𝑌) ↔ (𝑥 ∈ 𝑋 ∧ 𝑥 ∈ 𝑌))
12	11	biancomi 465	. . . . . 6 ⊢ (𝑥 ∈ (𝑋 ∩ 𝑌) ↔ (𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋))
13	12	anbi1i 625	. . . . 5 ⊢ ((𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ ((𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋) ∧ (𝑃𝐶𝑥) < 𝑅))
14		anass 471	. . . . 5 ⊢ (((𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)))
15	13, 14	bitri 277	. . . 4 ⊢ ((𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)))
16		ancom 463	. . . 4 ⊢ (((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
17	10, 15, 16	3bitr4g 316	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → ((𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ ((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌)))
18		xmetres 22968	. . . . 5 ⊢ (𝐷 ∈ (∞Met‘𝑋) → (𝐷 ↾ (𝑌 × 𝑌)) ∈ (∞Met‘(𝑋 ∩ 𝑌)))
19	2, 18	eqeltrid 2917	. . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐶 ∈ (∞Met‘(𝑋 ∩ 𝑌)))
20		elbl 22992	. . . 4 ⊢ ((𝐶 ∈ (∞Met‘(𝑋 ∩ 𝑌)) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐶)𝑅) ↔ (𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅)))
21	19, 20	syl3an1 1159	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐶)𝑅) ↔ (𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅)))
22		elin 4169	. . . 4 ⊢ (𝑥 ∈ ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌) ↔ (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ∧ 𝑥 ∈ 𝑌))
23		elinel1 4172	. . . . . 6 ⊢ (𝑃 ∈ (𝑋 ∩ 𝑌) → 𝑃 ∈ 𝑋)
24		elbl 22992	. . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
25	23, 24	syl3an2 1160	. . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
26	25	anbi1d 631	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → ((𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ∧ 𝑥 ∈ 𝑌) ↔ ((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌)))
27	22, 26	syl5bb 285	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌) ↔ ((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌)))
28	17, 21, 27	3bitr4d 313	. 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐶)𝑅) ↔ 𝑥 ∈ ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌)))
29	28	eqrdv 2819	1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐶)𝑅) = ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1083   = wceq 1533   ∈ wcel 2110   ∩ cin 3935   class class class wbr 5059   × cxp 5548   ↾ cres 5552  ‘cfv 6350  (class class class)co 7150  ℝ^*cxr 10668   < clt 10669  ∞Metcxmet 20524  ballcbl 20526

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455  ax-cnex 10587  ax-resscn 10588

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-fv 6358  df-ov 7153  df-oprab 7154  df-mpo 7155  df-1st 7683  df-2nd 7684  df-map 8402  df-xr 10673  df-psmet 20531  df-xmet 20532  df-bl 20534

This theorem is referenced by:  metrest  23128  xrsmopn  23414  lebnumii  23564  blssp  35025  sstotbnd2  35046  blbnd  35059  ssbnd  35060  iooabslt  41766