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Theorem stdbdbl 22232
Description: The standard bounded metric corresponding to 𝐶 generates the same balls as 𝐶 for radii less than 𝑅. (Contributed by Mario Carneiro, 26-Aug-2015.)
Hypothesis
Ref Expression
stdbdmet.1 𝐷 = (𝑥𝑋, 𝑦𝑋 ↦ if((𝑥𝐶𝑦) ≤ 𝑅, (𝑥𝐶𝑦), 𝑅))
Assertion
Ref Expression
stdbdbl (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → (𝑃(ball‘𝐷)𝑆) = (𝑃(ball‘𝐶)𝑆))
Distinct variable groups:   𝑥,𝑦,𝐶   𝑥,𝑃,𝑦   𝑥,𝑅,𝑦   𝑥,𝑋,𝑦
Allowed substitution hints:   𝐷(𝑥,𝑦)   𝑆(𝑥,𝑦)

Proof of Theorem stdbdbl
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 simpll2 1099 . . . . . 6 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → 𝑅 ∈ ℝ*)
2 simpr1 1065 . . . . . . 7 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → 𝑃𝑋)
32adantr 481 . . . . . 6 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → 𝑃𝑋)
4 simpr 477 . . . . . 6 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → 𝑧𝑋)
5 stdbdmet.1 . . . . . . 7 𝐷 = (𝑥𝑋, 𝑦𝑋 ↦ if((𝑥𝐶𝑦) ≤ 𝑅, (𝑥𝐶𝑦), 𝑅))
65stdbdmetval 22229 . . . . . 6 ((𝑅 ∈ ℝ*𝑃𝑋𝑧𝑋) → (𝑃𝐷𝑧) = if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅))
71, 3, 4, 6syl3anc 1323 . . . . 5 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (𝑃𝐷𝑧) = if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅))
87breq1d 4623 . . . 4 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → ((𝑃𝐷𝑧) < 𝑆 ↔ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) < 𝑆))
9 simplr3 1103 . . . . . . . 8 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → 𝑆𝑅)
109biantrud 528 . . . . . . 7 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (𝑆 ≤ (𝑃𝐶𝑧) ↔ (𝑆 ≤ (𝑃𝐶𝑧) ∧ 𝑆𝑅)))
11 simpr2 1066 . . . . . . . . 9 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → 𝑆 ∈ ℝ*)
1211adantr 481 . . . . . . . 8 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → 𝑆 ∈ ℝ*)
13 simpl1 1062 . . . . . . . . . 10 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → 𝐶 ∈ (∞Met‘𝑋))
1413adantr 481 . . . . . . . . 9 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → 𝐶 ∈ (∞Met‘𝑋))
15 xmetcl 22046 . . . . . . . . 9 ((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑧𝑋) → (𝑃𝐶𝑧) ∈ ℝ*)
1614, 3, 4, 15syl3anc 1323 . . . . . . . 8 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (𝑃𝐶𝑧) ∈ ℝ*)
17 xrlemin 11958 . . . . . . . 8 ((𝑆 ∈ ℝ* ∧ (𝑃𝐶𝑧) ∈ ℝ*𝑅 ∈ ℝ*) → (𝑆 ≤ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) ↔ (𝑆 ≤ (𝑃𝐶𝑧) ∧ 𝑆𝑅)))
1812, 16, 1, 17syl3anc 1323 . . . . . . 7 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (𝑆 ≤ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) ↔ (𝑆 ≤ (𝑃𝐶𝑧) ∧ 𝑆𝑅)))
1910, 18bitr4d 271 . . . . . 6 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (𝑆 ≤ (𝑃𝐶𝑧) ↔ 𝑆 ≤ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅)))
2019notbid 308 . . . . 5 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (¬ 𝑆 ≤ (𝑃𝐶𝑧) ↔ ¬ 𝑆 ≤ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅)))
21 xrltnle 10049 . . . . . 6 (((𝑃𝐶𝑧) ∈ ℝ*𝑆 ∈ ℝ*) → ((𝑃𝐶𝑧) < 𝑆 ↔ ¬ 𝑆 ≤ (𝑃𝐶𝑧)))
2216, 12, 21syl2anc 692 . . . . 5 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → ((𝑃𝐶𝑧) < 𝑆 ↔ ¬ 𝑆 ≤ (𝑃𝐶𝑧)))
2316, 1ifcld 4103 . . . . . 6 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) ∈ ℝ*)
24 xrltnle 10049 . . . . . 6 ((if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) ∈ ℝ*𝑆 ∈ ℝ*) → (if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) < 𝑆 ↔ ¬ 𝑆 ≤ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅)))
2523, 12, 24syl2anc 692 . . . . 5 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → (if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) < 𝑆 ↔ ¬ 𝑆 ≤ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅)))
2620, 22, 253bitr4d 300 . . . 4 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → ((𝑃𝐶𝑧) < 𝑆 ↔ if((𝑃𝐶𝑧) ≤ 𝑅, (𝑃𝐶𝑧), 𝑅) < 𝑆))
278, 26bitr4d 271 . . 3 ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) ∧ 𝑧𝑋) → ((𝑃𝐷𝑧) < 𝑆 ↔ (𝑃𝐶𝑧) < 𝑆))
2827rabbidva 3176 . 2 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → {𝑧𝑋 ∣ (𝑃𝐷𝑧) < 𝑆} = {𝑧𝑋 ∣ (𝑃𝐶𝑧) < 𝑆})
295stdbdxmet 22230 . . . 4 ((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) → 𝐷 ∈ (∞Met‘𝑋))
3029adantr 481 . . 3 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → 𝐷 ∈ (∞Met‘𝑋))
31 blval 22101 . . 3 ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑆 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑆) = {𝑧𝑋 ∣ (𝑃𝐷𝑧) < 𝑆})
3230, 2, 11, 31syl3anc 1323 . 2 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → (𝑃(ball‘𝐷)𝑆) = {𝑧𝑋 ∣ (𝑃𝐷𝑧) < 𝑆})
33 blval 22101 . . 3 ((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑃𝑋𝑆 ∈ ℝ*) → (𝑃(ball‘𝐶)𝑆) = {𝑧𝑋 ∣ (𝑃𝐶𝑧) < 𝑆})
3413, 2, 11, 33syl3anc 1323 . 2 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → (𝑃(ball‘𝐶)𝑆) = {𝑧𝑋 ∣ (𝑃𝐶𝑧) < 𝑆})
3528, 32, 343eqtr4d 2665 1 (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝑅 ∈ ℝ* ∧ 0 < 𝑅) ∧ (𝑃𝑋𝑆 ∈ ℝ*𝑆𝑅)) → (𝑃(ball‘𝐷)𝑆) = (𝑃(ball‘𝐶)𝑆))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 384  w3a 1036   = wceq 1480  wcel 1987  {crab 2911  ifcif 4058   class class class wbr 4613  cfv 5847  (class class class)co 6604  cmpt2 6606  0cc0 9880  *cxr 10017   < clt 10018  cle 10019  ∞Metcxmt 19650  ballcbl 19652
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902  ax-cnex 9936  ax-resscn 9937  ax-1cn 9938  ax-icn 9939  ax-addcl 9940  ax-addrcl 9941  ax-mulcl 9942  ax-mulrcl 9943  ax-mulcom 9944  ax-addass 9945  ax-mulass 9946  ax-distr 9947  ax-i2m1 9948  ax-1ne0 9949  ax-1rid 9950  ax-rnegex 9951  ax-rrecex 9952  ax-cnre 9953  ax-pre-lttri 9954  ax-pre-lttrn 9955  ax-pre-ltadd 9956  ax-pre-mulgt0 9957
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-nel 2894  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-op 4155  df-uni 4403  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-id 4989  df-po 4995  df-so 4996  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-1st 7113  df-2nd 7114  df-er 7687  df-map 7804  df-en 7900  df-dom 7901  df-sdom 7902  df-pnf 10020  df-mnf 10021  df-xr 10022  df-ltxr 10023  df-le 10024  df-sub 10212  df-neg 10213  df-div 10629  df-2 11023  df-rp 11777  df-xneg 11890  df-xadd 11891  df-xmul 11892  df-icc 12124  df-psmet 19657  df-xmet 19658  df-bl 19660
This theorem is referenced by:  stdbdmopn  22233  xlebnum  22672
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