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Theorem metustsym 22170
 Description: Elements of the filter base generated by the metric 𝐷 are symmetric. (Contributed by Thierry Arnoux, 28-Nov-2017.) (Revised by Thierry Arnoux, 11-Feb-2018.)
Hypothesis
Ref Expression
metust.1 𝐹 = ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎)))
Assertion
Ref Expression
metustsym ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → 𝐴 = 𝐴)
Distinct variable groups:   𝐷,𝑎   𝑋,𝑎   𝐴,𝑎   𝐹,𝑎

Proof of Theorem metustsym
Dummy variables 𝑝 𝑞 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 metust.1 . . . 4 𝐹 = ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎)))
21metustss 22166 . . 3 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → 𝐴 ⊆ (𝑋 × 𝑋))
3 cnvss 5216 . . . 4 (𝐴 ⊆ (𝑋 × 𝑋) → 𝐴(𝑋 × 𝑋))
4 cnvxp 5470 . . . 4 (𝑋 × 𝑋) = (𝑋 × 𝑋)
53, 4syl6sseq 3614 . . 3 (𝐴 ⊆ (𝑋 × 𝑋) → 𝐴 ⊆ (𝑋 × 𝑋))
62, 5syl 17 . 2 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → 𝐴 ⊆ (𝑋 × 𝑋))
7 simp-4l 802 . . . . . . . . . 10 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → 𝐷 ∈ (PsMet‘𝑋))
8 simpr1r 1112 . . . . . . . . . . 11 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ((𝑝𝑋𝑞𝑋) ∧ 𝑎 ∈ ℝ+𝐴 = (𝐷 “ (0[,)𝑎)))) → 𝑞𝑋)
983anassrs 1282 . . . . . . . . . 10 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → 𝑞𝑋)
10 simpr1l 1111 . . . . . . . . . . 11 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ ((𝑝𝑋𝑞𝑋) ∧ 𝑎 ∈ ℝ+𝐴 = (𝐷 “ (0[,)𝑎)))) → 𝑝𝑋)
11103anassrs 1282 . . . . . . . . . 10 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → 𝑝𝑋)
12 psmetsym 21925 . . . . . . . . . 10 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝑞𝑋𝑝𝑋) → (𝑞𝐷𝑝) = (𝑝𝐷𝑞))
137, 9, 11, 12syl3anc 1318 . . . . . . . . 9 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (𝑞𝐷𝑝) = (𝑝𝐷𝑞))
14 df-ov 6552 . . . . . . . . 9 (𝑞𝐷𝑝) = (𝐷‘⟨𝑞, 𝑝⟩)
15 df-ov 6552 . . . . . . . . 9 (𝑝𝐷𝑞) = (𝐷‘⟨𝑝, 𝑞⟩)
1613, 14, 153eqtr3g 2667 . . . . . . . 8 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (𝐷‘⟨𝑞, 𝑝⟩) = (𝐷‘⟨𝑝, 𝑞⟩))
1716eleq1d 2672 . . . . . . 7 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ((𝐷‘⟨𝑞, 𝑝⟩) ∈ (0[,)𝑎) ↔ (𝐷‘⟨𝑝, 𝑞⟩) ∈ (0[,)𝑎)))
18 psmetf 21921 . . . . . . . . 9 (𝐷 ∈ (PsMet‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ*)
19 ffun 5961 . . . . . . . . 9 (𝐷:(𝑋 × 𝑋)⟶ℝ* → Fun 𝐷)
207, 18, 193syl 18 . . . . . . . 8 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → Fun 𝐷)
21 simpllr 795 . . . . . . . . . . 11 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (𝑝𝑋𝑞𝑋))
2221ancomd 466 . . . . . . . . . 10 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (𝑞𝑋𝑝𝑋))
23 opelxpi 5072 . . . . . . . . . 10 ((𝑞𝑋𝑝𝑋) → ⟨𝑞, 𝑝⟩ ∈ (𝑋 × 𝑋))
2422, 23syl 17 . . . . . . . . 9 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ⟨𝑞, 𝑝⟩ ∈ (𝑋 × 𝑋))
25 fdm 5964 . . . . . . . . . 10 (𝐷:(𝑋 × 𝑋)⟶ℝ* → dom 𝐷 = (𝑋 × 𝑋))
267, 18, 253syl 18 . . . . . . . . 9 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → dom 𝐷 = (𝑋 × 𝑋))
2724, 26eleqtrrd 2691 . . . . . . . 8 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ⟨𝑞, 𝑝⟩ ∈ dom 𝐷)
28 fvimacnv 6240 . . . . . . . 8 ((Fun 𝐷 ∧ ⟨𝑞, 𝑝⟩ ∈ dom 𝐷) → ((𝐷‘⟨𝑞, 𝑝⟩) ∈ (0[,)𝑎) ↔ ⟨𝑞, 𝑝⟩ ∈ (𝐷 “ (0[,)𝑎))))
2920, 27, 28syl2anc 691 . . . . . . 7 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ((𝐷‘⟨𝑞, 𝑝⟩) ∈ (0[,)𝑎) ↔ ⟨𝑞, 𝑝⟩ ∈ (𝐷 “ (0[,)𝑎))))
30 opelxpi 5072 . . . . . . . . . 10 ((𝑝𝑋𝑞𝑋) → ⟨𝑝, 𝑞⟩ ∈ (𝑋 × 𝑋))
3121, 30syl 17 . . . . . . . . 9 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ⟨𝑝, 𝑞⟩ ∈ (𝑋 × 𝑋))
3231, 26eleqtrrd 2691 . . . . . . . 8 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ⟨𝑝, 𝑞⟩ ∈ dom 𝐷)
33 fvimacnv 6240 . . . . . . . 8 ((Fun 𝐷 ∧ ⟨𝑝, 𝑞⟩ ∈ dom 𝐷) → ((𝐷‘⟨𝑝, 𝑞⟩) ∈ (0[,)𝑎) ↔ ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎))))
3420, 32, 33syl2anc 691 . . . . . . 7 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → ((𝐷‘⟨𝑝, 𝑞⟩) ∈ (0[,)𝑎) ↔ ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎))))
3517, 29, 343bitr3d 297 . . . . . 6 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (⟨𝑞, 𝑝⟩ ∈ (𝐷 “ (0[,)𝑎)) ↔ ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎))))
36 simpr 476 . . . . . . 7 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → 𝐴 = (𝐷 “ (0[,)𝑎)))
3736eleq2d 2673 . . . . . 6 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (⟨𝑞, 𝑝⟩ ∈ 𝐴 ↔ ⟨𝑞, 𝑝⟩ ∈ (𝐷 “ (0[,)𝑎))))
3836eleq2d 2673 . . . . . 6 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (⟨𝑝, 𝑞⟩ ∈ 𝐴 ↔ ⟨𝑝, 𝑞⟩ ∈ (𝐷 “ (0[,)𝑎))))
3935, 37, 383bitr4d 299 . . . . 5 (((((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) ∧ 𝑎 ∈ ℝ+) ∧ 𝐴 = (𝐷 “ (0[,)𝑎))) → (⟨𝑞, 𝑝⟩ ∈ 𝐴 ↔ ⟨𝑝, 𝑞⟩ ∈ 𝐴))
40 eqid 2610 . . . . . . . . 9 (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎))) = (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎)))
4140elrnmpt 5293 . . . . . . . 8 (𝐴 ∈ ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎))) → (𝐴 ∈ ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎))) ↔ ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎))))
4241ibi 255 . . . . . . 7 (𝐴 ∈ ran (𝑎 ∈ ℝ+ ↦ (𝐷 “ (0[,)𝑎))) → ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎)))
4342, 1eleq2s 2706 . . . . . 6 (𝐴𝐹 → ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎)))
4443ad2antlr 759 . . . . 5 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) → ∃𝑎 ∈ ℝ+ 𝐴 = (𝐷 “ (0[,)𝑎)))
4539, 44r19.29a 3060 . . . 4 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) → (⟨𝑞, 𝑝⟩ ∈ 𝐴 ↔ ⟨𝑝, 𝑞⟩ ∈ 𝐴))
46 df-br 4584 . . . . 5 (𝑝𝐴𝑞 ↔ ⟨𝑝, 𝑞⟩ ∈ 𝐴)
47 vex 3176 . . . . . 6 𝑝 ∈ V
48 vex 3176 . . . . . 6 𝑞 ∈ V
4947, 48opelcnv 5226 . . . . 5 (⟨𝑝, 𝑞⟩ ∈ 𝐴 ↔ ⟨𝑞, 𝑝⟩ ∈ 𝐴)
5046, 49bitri 263 . . . 4 (𝑝𝐴𝑞 ↔ ⟨𝑞, 𝑝⟩ ∈ 𝐴)
51 df-br 4584 . . . 4 (𝑝𝐴𝑞 ↔ ⟨𝑝, 𝑞⟩ ∈ 𝐴)
5245, 50, 513bitr4g 302 . . 3 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ (𝑝𝑋𝑞𝑋)) → (𝑝𝐴𝑞𝑝𝐴𝑞))
53523impb 1252 . 2 (((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) ∧ 𝑝𝑋𝑞𝑋) → (𝑝𝐴𝑞𝑝𝐴𝑞))
546, 2, 53eqbrrdva 5213 1 ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴𝐹) → 𝐴 = 𝐴)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ∃wrex 2897   ⊆ wss 3540  ⟨cop 4131   class class class wbr 4583   ↦ cmpt 4643   × cxp 5036  ◡ccnv 5037  dom cdm 5038  ran crn 5039   “ cima 5041  Fun wfun 5798  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549  0cc0 9815  ℝ*cxr 9952  ℝ+crp 11708  [,)cico 12048  PsMetcpsmet 19551 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-po 4959  df-so 4960  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-xadd 11823  df-psmet 19559 This theorem is referenced by:  metust  22173
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