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Theorem metustid 22683
Description: The identity diagonal is included in all elements of the filter base generated by the metric 𝐷. (Contributed by Thierry Arnoux, 22-Nov-2017.) (Revised by Thierry Arnoux, 11-Feb-2018.) (Proof shortened by Peter Mazsa, 2-Oct-2022.)
Hypothesis
Ref Expression
metust.1 𝐹 = ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎)))
Assertion
Ref Expression
metustid ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → ( I ↾ 𝑋) ⊆ 𝐴)
Distinct variable groups:   𝐷,𝑎   𝑋,𝑎   𝐴,𝑎   𝐹,𝑎

Proof of Theorem metustid
Dummy variables 𝑝 𝑞 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 relres 5634 . . 3 Rel ( I ↾ 𝑋)
21a1i 11 . 2 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → Rel ( I ↾ 𝑋))
3 vex 3386 . . . . . . . . . . . . . . 15 𝑞 ∈ V
43brresi 5607 . . . . . . . . . . . . . 14 (𝑝( I ↾ 𝑋)𝑞 ↔ (𝑝𝑋𝑝 I 𝑞))
5 df-br 4842 . . . . . . . . . . . . . 14 (𝑝( I ↾ 𝑋)𝑞 ↔ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋))
63ideq 5476 . . . . . . . . . . . . . . 15 (𝑝 I 𝑞𝑝 = 𝑞)
76anbi2i 617 . . . . . . . . . . . . . 14 ((𝑝𝑋𝑝 I 𝑞) ↔ (𝑝𝑋𝑝 = 𝑞))
84, 5, 73bitr3i 293 . . . . . . . . . . . . 13 (⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋) ↔ (𝑝𝑋𝑝 = 𝑞))
98biimpi 208 . . . . . . . . . . . 12 (⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋) → (𝑝𝑋𝑝 = 𝑞))
109ad2antlr 719 . . . . . . . . . . 11 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → (𝑝𝑋𝑝 = 𝑞))
1110simprd 490 . . . . . . . . . 10 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → 𝑝 = 𝑞)
12 df-ov 6879 . . . . . . . . . . 11 (𝑝𝐷𝑝) = (𝐷‘⟨𝑝, 𝑝⟩)
13 opeq2 4592 . . . . . . . . . . . 12 (𝑝 = 𝑞 → ⟨𝑝, 𝑝⟩ = ⟨𝑝, 𝑞⟩)
1413fveq2d 6413 . . . . . . . . . . 11 (𝑝 = 𝑞 → (𝐷‘⟨𝑝, 𝑝⟩) = (𝐷‘⟨𝑝, 𝑞⟩))
1512, 14syl5eq 2843 . . . . . . . . . 10 (𝑝 = 𝑞 → (𝑝𝐷𝑝) = (𝐷‘⟨𝑝, 𝑞⟩))
1611, 15syl 17 . . . . . . . . 9 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → (𝑝𝐷𝑝) = (𝐷‘⟨𝑝, 𝑞⟩))
17 simplll 792 . . . . . . . . . 10 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → 𝐷 ∈ (PsMet‘𝑋))
1810simpld 489 . . . . . . . . . 10 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → 𝑝𝑋)
19 psmet0 22437 . . . . . . . . . 10 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑝𝑋) → (𝑝𝐷𝑝) = 0)
2017, 18, 19syl2anc 580 . . . . . . . . 9 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → (𝑝𝐷𝑝) = 0)
2116, 20eqtr3d 2833 . . . . . . . 8 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → (𝐷‘⟨𝑝, 𝑞⟩) = 0)
22 0xr 10373 . . . . . . . . . 10 0 ∈ ℝ*
23 rpxr 12081 . . . . . . . . . 10 (𝑎 ∈ ℝ+𝑎 ∈ ℝ*)
24 rpgt0 12084 . . . . . . . . . 10 (𝑎 ∈ ℝ+ → 0 < 𝑎)
25 lbico1 12473 . . . . . . . . . 10 ((0 ∈ ℝ*𝑎 ∈ ℝ* ∧ 0 < 𝑎) → 0 ∈ (0[,)𝑎))
2622, 23, 24, 25mp3an2i 1591 . . . . . . . . 9 (𝑎 ∈ ℝ+ → 0 ∈ (0[,)𝑎))
2726adantl 474 . . . . . . . 8 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → 0 ∈ (0[,)𝑎))
2821, 27eqeltrd 2876 . . . . . . 7 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → (𝐷‘⟨𝑝, 𝑞⟩) ∈ (0[,)𝑎))
29 psmetf 22435 . . . . . . . . . 10 (𝐷 ∈ (PsMet‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ*)
3029ffund 6258 . . . . . . . . 9 (𝐷 ∈ (PsMet‘𝑋) → Fun 𝐷)
3130ad3antrrr 722 . . . . . . . 8 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → Fun 𝐷)
3211, 18eqeltrrd 2877 . . . . . . . . . 10 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → 𝑞𝑋)
3318, 32opelxpd 5348 . . . . . . . . 9 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → ⟨𝑝, 𝑞⟩ ∈ (𝑋 × 𝑋))
3429fdmd 6263 . . . . . . . . . 10 (𝐷 ∈ (PsMet‘𝑋) → dom 𝐷 = (𝑋 × 𝑋))
3534ad3antrrr 722 . . . . . . . . 9 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → dom 𝐷 = (𝑋 × 𝑋))
3633, 35eleqtrrd 2879 . . . . . . . 8 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → ⟨𝑝, 𝑞⟩ ∈ dom 𝐷)
37 fvimacnv 6556 . . . . . . . 8 ((Fun 𝐷 ∧ ⟨𝑝, 𝑞⟩ ∈ dom 𝐷) → ((𝐷‘⟨𝑝, 𝑞⟩) ∈ (0[,)𝑎) ↔ ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎))))
3831, 36, 37syl2anc 580 . . . . . . 7 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → ((𝐷‘⟨𝑝, 𝑞⟩) ∈ (0[,)𝑎) ↔ ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎))))
3928, 38mpbid 224 . . . . . 6 ((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) → ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎)))
4039adantr 473 . . . . 5 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎)))
41 simpr 478 . . . . 5 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → 𝐴 = (𝐷 “ (0[,)𝑎)))
4240, 41eleqtrrd 2879 . . . 4 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ⟨𝑝, 𝑞⟩ ∈ 𝐴)
43 simplr 786 . . . . 5 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) → 𝐴𝐹)
44 metust.1 . . . . . . 7 𝐹 = ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎)))
4544metustel 22679 . . . . . 6 (𝐷 ∈ (PsMet‘𝑋) → (𝐴𝐹 ↔ ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎))))
4645ad2antrr 718 . . . . 5 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) → (𝐴𝐹 ↔ ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎))))
4743, 46mpbid 224 . . . 4 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) → ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎)))
4842, 47r19.29a 3257 . . 3 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋)) → ⟨𝑝, 𝑞⟩ ∈ 𝐴)
4948ex 402 . 2 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → (⟨𝑝, 𝑞⟩ ∈ ( I ↾ 𝑋) → ⟨𝑝, 𝑞⟩ ∈ 𝐴))
502, 49relssdv 5414 1 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → ( I ↾ 𝑋) ⊆ 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 198  wa 385   = wceq 1653  wcel 2157  wrex 3088  wss 3767  cop 4372   class class class wbr 4841  cmpt 4920   I cid 5217   × cxp 5308  ccnv 5309  dom cdm 5310  ran crn 5311  cres 5312  cima 5313  Rel wrel 5315  Fun wfun 6093  cfv 6099  (class class class)co 6876  0cc0 10222  *cxr 10360   < clt 10361  +crp 12070  [,)cico 12422  PsMetcpsmet 20048
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2375  ax-ext 2775  ax-sep 4973  ax-nul 4981  ax-pow 5033  ax-pr 5095  ax-un 7181  ax-cnex 10278  ax-resscn 10279  ax-1cn 10280  ax-addrcl 10283  ax-rnegex 10293  ax-cnre 10295  ax-pre-lttri 10296  ax-pre-lttrn 10297
This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3or 1109  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2590  df-eu 2607  df-clab 2784  df-cleq 2790  df-clel 2793  df-nfc 2928  df-ne 2970  df-nel 3073  df-ral 3092  df-rex 3093  df-rab 3096  df-v 3385  df-sbc 3632  df-csb 3727  df-dif 3770  df-un 3772  df-in 3774  df-ss 3781  df-nul 4114  df-if 4276  df-pw 4349  df-sn 4367  df-pr 4369  df-op 4373  df-uni 4627  df-br 4842  df-opab 4904  df-mpt 4921  df-id 5218  df-po 5231  df-so 5232  df-xp 5316  df-rel 5317  df-cnv 5318  df-co 5319  df-dm 5320  df-rn 5321  df-res 5322  df-ima 5323  df-iota 6062  df-fun 6101  df-fn 6102  df-f 6103  df-f1 6104  df-fo 6105  df-f1o 6106  df-fv 6107  df-ov 6879  df-oprab 6880  df-mpt2 6881  df-er 7980  df-map 8095  df-en 8194  df-dom 8195  df-sdom 8196  df-pnf 10363  df-mnf 10364  df-xr 10365  df-ltxr 10366  df-le 10367  df-rp 12071  df-ico 12426  df-psmet 20056
This theorem is referenced by:  metustfbas  22686  metust  22687
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