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| Mirrors > Home > ILE Home > Th. List > psmetcl | GIF version | ||
| Description: Closure of the distance function of a pseudometric space. (Contributed by Thierry Arnoux, 7-Feb-2018.) |
| Ref | Expression |
|---|---|
| psmetcl | ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ*) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | psmetf 14882 | . 2 ⊢ (𝐷 ∈ (PsMet‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ*) | |
| 2 | fovcdm 6107 | . 2 ⊢ ((𝐷:(𝑋 × 𝑋)⟶ℝ* ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ*) | |
| 3 | 1, 2 | syl3an1 1283 | 1 ⊢ ((𝐷 ∈ (PsMet‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ*) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ w3a 981 ∈ wcel 2177 × cxp 4686 ⟶wf 5281 ‘cfv 5285 (class class class)co 5962 ℝ*cxr 8136 PsMetcpsmet 14382 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4173 ax-pow 4229 ax-pr 4264 ax-un 4493 ax-setind 4598 ax-cnex 8046 ax-resscn 8047 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-ral 2490 df-rex 2491 df-rab 2494 df-v 2775 df-sbc 3003 df-csb 3098 df-dif 3172 df-un 3174 df-in 3176 df-ss 3183 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-uni 3860 df-br 4055 df-opab 4117 df-mpt 4118 df-id 4353 df-xp 4694 df-rel 4695 df-cnv 4696 df-co 4697 df-dm 4698 df-rn 4699 df-res 4700 df-ima 4701 df-iota 5246 df-fun 5287 df-fn 5288 df-f 5289 df-fv 5293 df-ov 5965 df-oprab 5966 df-mpo 5967 df-map 6755 df-pnf 8139 df-mnf 8140 df-xr 8141 df-psmet 14390 |
| This theorem is referenced by: psmetsym 14886 psmetge0 14888 psmetlecl 14891 xblpnfps 14955 xblss2ps 14961 blssps 14984 |
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