Theorem blres 22236

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		inss2 3834	. . . . . . . . . 10 ⊢ (𝑋 ∩ 𝑌) ⊆ 𝑌
2	1	sseli 3599	. . . . . . . . 9 ⊢ (𝑃 ∈ (𝑋 ∩ 𝑌) → 𝑃 ∈ 𝑌)
3		blres.2	. . . . . . . . . . 11 ⊢ 𝐶 = (𝐷 ↾ (𝑌 × 𝑌))
4	3	oveqi 6663	. . . . . . . . . 10 ⊢ (𝑃𝐶𝑥) = (𝑃(𝐷 ↾ (𝑌 × 𝑌))𝑥)
5		ovres 6800	. . . . . . . . . 10 ⊢ ((𝑃 ∈ 𝑌 ∧ 𝑥 ∈ 𝑌) → (𝑃(𝐷 ↾ (𝑌 × 𝑌))𝑥) = (𝑃𝐷𝑥))
6	4, 5	syl5eq 2668	. . . . . . . . 9 ⊢ ((𝑃 ∈ 𝑌 ∧ 𝑥 ∈ 𝑌) → (𝑃𝐶𝑥) = (𝑃𝐷𝑥))
7	2, 6	sylan 488	. . . . . . . 8 ⊢ ((𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑥 ∈ 𝑌) → (𝑃𝐶𝑥) = (𝑃𝐷𝑥))
8	7	breq1d 4663	. . . . . . 7 ⊢ ((𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑥 ∈ 𝑌) → ((𝑃𝐶𝑥) < 𝑅 ↔ (𝑃𝐷𝑥) < 𝑅))
9	8	anbi2d 740	. . . . . 6 ⊢ ((𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑥 ∈ 𝑌) → ((𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
10	9	pm5.32da 673	. . . . 5 ⊢ (𝑃 ∈ (𝑋 ∩ 𝑌) → ((𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅))))
11	10	3ad2ant2 1083	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → ((𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅))))
12		elin 3796	. . . . . . 7 ⊢ (𝑥 ∈ (𝑋 ∩ 𝑌) ↔ (𝑥 ∈ 𝑋 ∧ 𝑥 ∈ 𝑌))
13		ancom 466	. . . . . . 7 ⊢ ((𝑥 ∈ 𝑋 ∧ 𝑥 ∈ 𝑌) ↔ (𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋))
14	12, 13	bitri 264	. . . . . 6 ⊢ (𝑥 ∈ (𝑋 ∩ 𝑌) ↔ (𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋))
15	14	anbi1i 731	. . . . 5 ⊢ ((𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ ((𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋) ∧ (𝑃𝐶𝑥) < 𝑅))
16		anass 681	. . . . 5 ⊢ (((𝑥 ∈ 𝑌 ∧ 𝑥 ∈ 𝑋) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)))
17	15, 16	bitri 264	. . . 4 ⊢ ((𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐶𝑥) < 𝑅)))
18		ancom 466	. . . 4 ⊢ (((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌) ↔ (𝑥 ∈ 𝑌 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
19	11, 17, 18	3bitr4g 303	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → ((𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅) ↔ ((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌)))
20		xmetres 22169	. . . . 5 ⊢ (𝐷 ∈ (∞Met‘𝑋) → (𝐷 ↾ (𝑌 × 𝑌)) ∈ (∞Met‘(𝑋 ∩ 𝑌)))
21	3, 20	syl5eqel 2705	. . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐶 ∈ (∞Met‘(𝑋 ∩ 𝑌)))
22		elbl 22193	. . . 4 ⊢ ((𝐶 ∈ (∞Met‘(𝑋 ∩ 𝑌)) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐶)𝑅) ↔ (𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅)))
23	21, 22	syl3an1 1359	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐶)𝑅) ↔ (𝑥 ∈ (𝑋 ∩ 𝑌) ∧ (𝑃𝐶𝑥) < 𝑅)))
24		elin 3796	. . . 4 ⊢ (𝑥 ∈ ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌) ↔ (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ∧ 𝑥 ∈ 𝑌))
25		inss1 3833	. . . . . . 7 ⊢ (𝑋 ∩ 𝑌) ⊆ 𝑋
26	25	sseli 3599	. . . . . 6 ⊢ (𝑃 ∈ (𝑋 ∩ 𝑌) → 𝑃 ∈ 𝑋)
27		elbl 22193	. . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
28	26, 27	syl3an2 1360	. . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅)))
29	28	anbi1d 741	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → ((𝑥 ∈ (𝑃(ball‘𝐷)𝑅) ∧ 𝑥 ∈ 𝑌) ↔ ((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌)))
30	24, 29	syl5bb 272	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌) ↔ ((𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) < 𝑅) ∧ 𝑥 ∈ 𝑌)))
31	19, 23, 30	3bitr4d 300	. 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (𝑃(ball‘𝐶)𝑅) ↔ 𝑥 ∈ ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌)))
32	31	eqrdv 2620	1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ (𝑋 ∩ 𝑌) ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐶)𝑅) = ((𝑃(ball‘𝐷)𝑅) ∩ 𝑌))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990   ∩ cin 3573   class class class wbr 4653   × cxp 5112   ↾ cres 5116  ‘cfv 5888  (class class class)co 6650  ℝ^*cxr 10073   < clt 10074  ∞Metcxmt 19731  ballcbl 19733

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-map 7859  df-xr 10078  df-psmet 19738  df-xmet 19739  df-bl 19741

This theorem is referenced by:  metrest  22329  xrsmopn  22615  lebnumii  22765  blssp  33552  sstotbnd2  33573  blbnd  33586  ssbnd  33587  iooabslt  39721