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Mirrors > Home > ILE Home > Th. List > xmetec | GIF version |
Description: The equivalence classes under the finite separation equivalence relation are infinity balls. (Contributed by Mario Carneiro, 24-Aug-2015.) |
Ref | Expression |
---|---|
xmeter.1 | ⊢ ∼ = (◡𝐷 “ ℝ) |
Ref | Expression |
---|---|
xmetec | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → [𝑃] ∼ = (𝑃(ball‘𝐷)+∞)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xmeter.1 | . . . . 5 ⊢ ∼ = (◡𝐷 “ ℝ) | |
2 | 1 | xmeterval 13229 | . . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → (𝑃 ∼ 𝑥 ↔ (𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) |
3 | 3anass 977 | . . . . 5 ⊢ ((𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ) ↔ (𝑃 ∈ 𝑋 ∧ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) | |
4 | 3 | baib 914 | . . . 4 ⊢ (𝑃 ∈ 𝑋 → ((𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) |
5 | 2, 4 | sylan9bb 459 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑃 ∼ 𝑥 ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) |
6 | vex 2733 | . . . . 5 ⊢ 𝑥 ∈ V | |
7 | 6 | a1i 9 | . . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝑥 ∈ V) |
8 | elecg 6551 | . . . 4 ⊢ ((𝑥 ∈ V ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ [𝑃] ∼ ↔ 𝑃 ∼ 𝑥)) | |
9 | 7, 8 | sylan 281 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ [𝑃] ∼ ↔ 𝑃 ∼ 𝑥)) |
10 | xblpnf 13193 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ (𝑃(ball‘𝐷)+∞) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) | |
11 | 5, 9, 10 | 3bitr4d 219 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ [𝑃] ∼ ↔ 𝑥 ∈ (𝑃(ball‘𝐷)+∞))) |
12 | 11 | eqrdv 2168 | 1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → [𝑃] ∼ = (𝑃(ball‘𝐷)+∞)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 Vcvv 2730 class class class wbr 3989 ◡ccnv 4610 “ cima 4614 ‘cfv 5198 (class class class)co 5853 [cec 6511 ℝcr 7773 +∞cpnf 7951 ∞Metcxmet 12774 ballcbl 12776 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-mulrcl 7873 ax-addcom 7874 ax-mulcom 7875 ax-addass 7876 ax-mulass 7877 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-1rid 7881 ax-0id 7882 ax-rnegex 7883 ax-precex 7884 ax-cnre 7885 ax-pre-ltirr 7886 ax-pre-ltwlin 7887 ax-pre-lttrn 7888 ax-pre-ltadd 7890 ax-pre-mulgt0 7891 |
This theorem depends on definitions: df-bi 116 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-if 3527 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-id 4278 df-po 4281 df-iso 4282 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-1st 6119 df-2nd 6120 df-ec 6515 df-map 6628 df-pnf 7956 df-mnf 7957 df-xr 7958 df-ltxr 7959 df-le 7960 df-sub 8092 df-neg 8093 df-2 8937 df-xadd 9730 df-psmet 12781 df-xmet 12782 df-bl 12784 |
This theorem is referenced by: blssec 13232 blpnfctr 13233 |
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