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| Mirrors > Home > MPE Home > Th. List > xrletri3 | Structured version Visualization version GIF version | ||
| Description: Trichotomy law for extended reals. (Contributed by FL, 2-Aug-2009.) |
| Ref | Expression |
|---|---|
| xrletri3 | ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 = 𝐵 ↔ (𝐴 ≤ 𝐵 ∧ 𝐵 ≤ 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrlttri3 13279 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) | |
| 2 | 1 | biancomd 469 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 = 𝐵 ↔ (¬ 𝐵 < 𝐴 ∧ ¬ 𝐴 < 𝐵))) |
| 3 | xrlenlt 11381 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 4 | xrlenlt 11381 | . . . 4 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
| 5 | 4 | ancoms 464 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) |
| 6 | 3, 5 | anbi12d 644 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → ((𝐴 ≤ 𝐵 ∧ 𝐵 ≤ 𝐴) ↔ (¬ 𝐵 < 𝐴 ∧ ¬ 𝐴 < 𝐵))) |
| 7 | 2, 6 | bitr4d 285 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 = 𝐵 ↔ (𝐴 ≤ 𝐵 ∧ 𝐵 ≤ 𝐴))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ∈ wcel 2144 class class class wbr 5102 ℝ*cxr 11349 < clt 11350 ≤ cle 11351 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-resscn 11264 ax-pre-lttri 11281 ax-pre-lttrn 11282 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-er 8724 df-en 8981 df-dom 8982 df-sdom 8983 df-pnf 11352 df-mnf 11353 df-xr 11354 df-ltxr 11355 df-le 11356 |
| This theorem is used by: xrletrid 13291 xrmaxeq 13316 xrmineq 13317 xleadd1a 13390 xsubge0 13398 xlemul1a 13425 hashle00 14551 limsupval2 15656 pc2dvds 17066 pc11 17067 letsr 18776 xrge0omnd 21760 isxmet2d 24655 xmetgt0 24686 prdsxmetlem 24696 xblss2 24730 nmo0 25063 nmoid 25070 xrsxmet 25138 ovolssnul 25817 ovolctb 25820 ovoliunnul 25837 ovolre 25855 volsup 25886 vitalilem5 25942 itg2mulc 26077 umgrislfupgrlem 29709 upgr2pthnlp 30327 xeqlelt 33418 xrstos 33621 metideq 34575 metider 34576 esumpad2 34738 esumrnmpt2 34750 measle0 34891 inelcarsg 34993 carsggect 35000 carsgclctun 35003 omsmeas 35005 ovoliunnfl 38689 volsupnfl 38692 iccintsng 46643 liminfval2 46886 |
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