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| Mirrors > Home > MPE Home > Th. List > xrsdsval | Structured version Visualization version GIF version | ||
| Description: The metric of the extended real number structure. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xrsds.d | ⊢ 𝐷 = (dist‘ℝ*𝑠) |
| Ref | Expression |
|---|---|
| xrsdsval | ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴𝐷𝐵) = if(𝐴 ≤ 𝐵, (𝐵 +𝑒 -𝑒𝐴), (𝐴 +𝑒 -𝑒𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq12 5107 | . . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → (𝑥 ≤ 𝑦 ↔ 𝐴 ≤ 𝐵)) | |
| 2 | id 22 | . . . 4 ⊢ (𝑦 = 𝐵 → 𝑦 = 𝐵) | |
| 3 | xnegeq 13143 | . . . 4 ⊢ (𝑥 = 𝐴 → -𝑒𝑥 = -𝑒𝐴) | |
| 4 | 2, 3 | oveqan12rd 7389 | . . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → (𝑦 +𝑒 -𝑒𝑥) = (𝐵 +𝑒 -𝑒𝐴)) |
| 5 | id 22 | . . . 4 ⊢ (𝑥 = 𝐴 → 𝑥 = 𝐴) | |
| 6 | xnegeq 13143 | . . . 4 ⊢ (𝑦 = 𝐵 → -𝑒𝑦 = -𝑒𝐵) | |
| 7 | 5, 6 | oveqan12d 7388 | . . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → (𝑥 +𝑒 -𝑒𝑦) = (𝐴 +𝑒 -𝑒𝐵)) |
| 8 | 1, 4, 7 | ifbieq12d 4513 | . 2 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → if(𝑥 ≤ 𝑦, (𝑦 +𝑒 -𝑒𝑥), (𝑥 +𝑒 -𝑒𝑦)) = if(𝐴 ≤ 𝐵, (𝐵 +𝑒 -𝑒𝐴), (𝐴 +𝑒 -𝑒𝐵))) |
| 9 | xrsds.d | . . 3 ⊢ 𝐷 = (dist‘ℝ*𝑠) | |
| 10 | 9 | xrsds 21302 | . 2 ⊢ 𝐷 = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ if(𝑥 ≤ 𝑦, (𝑦 +𝑒 -𝑒𝑥), (𝑥 +𝑒 -𝑒𝑦))) |
| 11 | ovex 7402 | . . 3 ⊢ (𝐵 +𝑒 -𝑒𝐴) ∈ V | |
| 12 | ovex 7402 | . . 3 ⊢ (𝐴 +𝑒 -𝑒𝐵) ∈ V | |
| 13 | 11, 12 | ifex 4535 | . 2 ⊢ if(𝐴 ≤ 𝐵, (𝐵 +𝑒 -𝑒𝐴), (𝐴 +𝑒 -𝑒𝐵)) ∈ V |
| 14 | 8, 10, 13 | ovmpoa 7524 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴𝐷𝐵) = if(𝐴 ≤ 𝐵, (𝐵 +𝑒 -𝑒𝐴), (𝐴 +𝑒 -𝑒𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ifcif 4484 class class class wbr 5102 ‘cfv 6499 (class class class)co 7369 ℝ*cxr 11183 ≤ cle 11185 -𝑒cxne 13045 +𝑒 cxad 13046 distcds 17205 ℝ*𝑠cxrs 17439 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-1st 7947 df-2nd 7948 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-er 8648 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-nn 12163 df-2 12225 df-3 12226 df-4 12227 df-5 12228 df-6 12229 df-7 12230 df-8 12231 df-9 12232 df-n0 12419 df-z 12506 df-dec 12626 df-uz 12770 df-xneg 13048 df-xadd 13049 df-fz 13445 df-struct 17093 df-slot 17128 df-ndx 17140 df-base 17156 df-plusg 17209 df-mulr 17210 df-tset 17215 df-ple 17216 df-ds 17218 df-xrs 17441 |
| This theorem is referenced by: xrsdsreval 21304 xrsdsreclb 21306 xmetrtri2 24220 xrsxmet 24674 metdscn 24721 |
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