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| Mirrors > Home > MPE Home > Th. List > leloe | Structured version Visualization version GIF version | ||
| Description: 'Less than or equal to' expressed in terms of 'less than' or 'equals'. (Contributed by NM, 13-May-1999.) |
| Ref | Expression |
|---|---|
| leloe | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lenlt 11316 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 2 | axlttri 11309 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 < 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 < 𝐵))) | |
| 3 | 2 | ancoms 464 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 < 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 < 𝐵))) |
| 4 | 3 | con2bid 357 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ ¬ 𝐵 < 𝐴)) |
| 5 | eqcom 2769 | . . . . 5 ⊢ (𝐵 = 𝐴 ↔ 𝐴 = 𝐵) | |
| 6 | 5 | orbi1i 927 | . . . 4 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 = 𝐵 ∨ 𝐴 < 𝐵)) |
| 7 | orcom 884 | . . . 4 ⊢ ((𝐴 = 𝐵 ∨ 𝐴 < 𝐵) ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵)) | |
| 8 | 6, 7 | bitri 278 | . . 3 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵)) |
| 9 | 4, 8 | bitr3di 289 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (¬ 𝐵 < 𝐴 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| 10 | 1, 9 | bitrd 282 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∨ wo 861 = wceq 1570 ∈ wcel 2145 class class class wbr 5107 ℝcr 11127 < clt 11271 ≤ cle 11272 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-resscn 11185 ax-pre-lttri 11202 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-er 8700 df-en 8957 df-dom 8958 df-sdom 8959 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 |
| This theorem is used by: ltle 11326 leltne 11327 lelttr 11328 ltletr 11330 letr 11332 leid 11334 ltlen 11339 leloei 11355 leloed 11381 lemul1 12095 lemul1a 12097 squeeze0 12146 sup3 12200 nn0ge0 12557 nn0sub 12582 elnn0z 12632 xlemul1a 13344 modfzo0difsn 14011 om2uzlti 14018 om2uzlt2i 14019 sqlecan 14277 discr 14308 facdiv 14355 facwordi 14357 resqrex 15341 sqrt2irr 16343 lcmf 16729 ge2nprmge4 16798 efgsfo 19872 efgred 19881 itg2mulc 25981 itgabs 26069 dgrlt 26499 sinq12ge0 26753 sineq0 26769 cxpge0 26928 cxplea 26941 cxple2 26942 cxple2a 26944 cxpcn3lem 26992 cxpcn3 26993 cxpaddlelem 26996 cxpaddle 26997 ang180lem3 27056 atanlogaddlem 27158 rlimcnp2 27211 jensen 27233 amgm 27235 htthlem 31406 hiidge0 31587 staddi 32735 stadd3i 32737 2exple2exp 33312 poimirlem28 38405 itgaddnclem2 38436 itgabsnc 38446 sn-sup3d 43388 pellfund14gap 43736 sineq0ALT 45767 icccncfext 46723 ltnltne 48195 iccpartnel 48346 nprmmul3 48437 odz2prm2pw 48474 evenltle 48641 gbowge7 48687 bgoldbtbndlem1 48729 elfzolborelfzop1 49457 |
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