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Mirrors > Home > MPE Home > Th. List > letri3 | Structured version Visualization version GIF version |
Description: Trichotomy law. (Contributed by NM, 14-May-1999.) |
Ref | Expression |
---|---|
letri3 | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 = 𝐵 ↔ (𝐴 ≤ 𝐵 ∧ 𝐵 ≤ 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lttri3 11297 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) | |
2 | 1 | biancomd 465 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 = 𝐵 ↔ (¬ 𝐵 < 𝐴 ∧ ¬ 𝐴 < 𝐵))) |
3 | lenlt 11292 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
4 | lenlt 11292 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
5 | 4 | ancoms 460 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) |
6 | 3, 5 | anbi12d 632 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐴 ≤ 𝐵 ∧ 𝐵 ≤ 𝐴) ↔ (¬ 𝐵 < 𝐴 ∧ ¬ 𝐴 < 𝐵))) |
7 | 2, 6 | bitr4d 282 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 = 𝐵 ↔ (𝐴 ≤ 𝐵 ∧ 𝐵 ≤ 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 class class class wbr 5149 ℝcr 11109 < clt 11248 ≤ cle 11249 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-resscn 11167 ax-pre-lttri 11184 ax-pre-lttrn 11185 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-br 5150 df-opab 5212 df-mpt 5233 df-id 5575 df-po 5589 df-so 5590 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 |
This theorem is referenced by: eqlelt 11301 eqlei 11324 eqlei2 11325 letri3i 11330 letri3d 11356 lesub0 11731 eqord1 11742 lbreu 12164 nnle1eq1 12242 nn0le0eq0 12500 zextle 12635 uz11 12847 uzin 12862 uzwo 12895 qsqueeze 13180 elfz1eq 13512 faclbnd4lem4 14256 swrdccat3blem 14689 repswswrd 14734 sqeqd 15113 max0add 15257 fsum00 15744 reef11 16062 dvdsabseq 16256 nn0seqcvgd 16507 infpnlem1 16843 gzrngunit 21011 psrbaglesupp 21477 psrbaglesuppOLD 21478 nmoeq0 24253 oprpiece1res2 24468 pcoval2 24532 minveclem7 24952 pjthlem1 24954 iblposlem 25309 dvferm 25505 dveq0 25517 dv11cn 25518 fta1blem 25686 dgrco 25789 aalioulem3 25847 logf1o2 26158 cxpsqrtlem 26210 ang180lem3 26316 chpeq0 26711 chteq0 26712 lgsdir 26835 lgsabs1 26839 minvecolem7 30136 pjhthlem1 30644 pjnormssi 31421 hstles 31484 stge1i 31491 stle0i 31492 stlesi 31494 cdj3lem1 31687 derangen 34163 bfplem2 36691 bfp 36692 acongeq 41722 jm2.26lem3 41740 dvconstbi 43093 zgeltp1eq 46017 zgtp1leeq 47202 |
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