Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > psmetrel | GIF version |
Description: The class of pseudometrics is a relation. (Contributed by Jim Kingdon, 24-Apr-2023.) |
Ref | Expression |
---|---|
psmetrel | ⊢ Rel PsMet |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mptrel 4732 | . 2 ⊢ Rel (𝑥 ∈ V ↦ {𝑑 ∈ (ℝ* ↑𝑚 (𝑥 × 𝑥)) ∣ ∀𝑦 ∈ 𝑥 ((𝑦𝑑𝑦) = 0 ∧ ∀𝑧 ∈ 𝑥 ∀𝑤 ∈ 𝑥 (𝑦𝑑𝑧) ≤ ((𝑤𝑑𝑦) +𝑒 (𝑤𝑑𝑧)))}) | |
2 | df-psmet 12627 | . . 3 ⊢ PsMet = (𝑥 ∈ V ↦ {𝑑 ∈ (ℝ* ↑𝑚 (𝑥 × 𝑥)) ∣ ∀𝑦 ∈ 𝑥 ((𝑦𝑑𝑦) = 0 ∧ ∀𝑧 ∈ 𝑥 ∀𝑤 ∈ 𝑥 (𝑦𝑑𝑧) ≤ ((𝑤𝑑𝑦) +𝑒 (𝑤𝑑𝑧)))}) | |
3 | 2 | releqi 4687 | . 2 ⊢ (Rel PsMet ↔ Rel (𝑥 ∈ V ↦ {𝑑 ∈ (ℝ* ↑𝑚 (𝑥 × 𝑥)) ∣ ∀𝑦 ∈ 𝑥 ((𝑦𝑑𝑦) = 0 ∧ ∀𝑧 ∈ 𝑥 ∀𝑤 ∈ 𝑥 (𝑦𝑑𝑧) ≤ ((𝑤𝑑𝑦) +𝑒 (𝑤𝑑𝑧)))})) |
4 | 1, 3 | mpbir 145 | 1 ⊢ Rel PsMet |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 = wceq 1343 ∀wral 2444 {crab 2448 Vcvv 2726 class class class wbr 3982 ↦ cmpt 4043 × cxp 4602 Rel wrel 4609 (class class class)co 5842 ↑𝑚 cmap 6614 0cc0 7753 ℝ*cxr 7932 ≤ cle 7934 +𝑒 cxad 9706 PsMetcpsmet 12619 |
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-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-v 2728 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-opab 4044 df-mpt 4045 df-xp 4610 df-rel 4611 df-psmet 12627 |
This theorem is referenced by: blfvalps 13025 blvalps 13028 blfps 13049 |
Copyright terms: Public domain | W3C validator |