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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 11254 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 2 | axlttri 11247 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 < 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 < 𝐵))) | |
| 3 | 2 | ancoms 462 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 < 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 < 𝐵))) |
| 4 | 3 | con2bid 356 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ ¬ 𝐵 < 𝐴)) |
| 5 | eqcom 2768 | . . . . 5 ⊢ (𝐵 = 𝐴 ↔ 𝐴 = 𝐵) | |
| 6 | 5 | orbi1i 924 | . . . 4 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 = 𝐵 ∨ 𝐴 < 𝐵)) |
| 7 | orcom 881 | . . . 4 ⊢ ((𝐴 = 𝐵 ∨ 𝐴 < 𝐵) ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵)) | |
| 8 | 6, 7 | bitri 277 | . . 3 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵)) |
| 9 | 4, 8 | bitr3di 288 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (¬ 𝐵 < 𝐴 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| 10 | 1, 9 | bitrd 281 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 399 ∨ wo 858 = wceq 1559 ∈ wcel 2141 class class class wbr 5097 ℝcr 11065 < clt 11209 ≤ cle 11210 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-resscn 11123 ax-pre-lttri 11140 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-er 8671 df-en 8921 df-dom 8922 df-sdom 8923 df-pnf 11211 df-mnf 11212 df-xr 11213 df-ltxr 11214 df-le 11215 |
| This theorem is referenced by: ltle 11264 leltne 11265 lelttr 11266 ltletr 11268 letr 11270 leid 11272 ltlen 11277 leloei 11293 leloed 11319 lemul1 12036 lemul1a 12038 squeeze0 12088 sup3 12142 nn0ge0 12499 nn0sub 12524 elnn0z 12574 xlemul1a 13284 modfzo0difsn 13949 om2uzlti 13956 om2uzlt2i 13957 sqlecan 14215 discr 14246 facdiv 14293 facwordi 14295 resqrex 15267 sqrt2irr 16271 lcmf 16657 ge2nprmge4 16726 efgsfo 19769 efgred 19778 itg2mulc 25796 itgabs 25884 dgrlt 26313 sinq12ge0 26560 sineq0 26576 cxpge0 26735 cxplea 26748 cxple2 26749 cxple2a 26751 cxpcn3lem 26799 cxpcn3 26800 cxpaddlelem 26803 cxpaddle 26804 ang180lem3 26863 atanlogaddlem 26965 rlimcnp2 27018 jensen 27040 amgm 27042 htthlem 31076 hiidge0 31257 staddi 32405 stadd3i 32407 2exple2exp 32996 poimirlem28 38107 itgaddnclem2 38138 itgabsnc 38148 sn-sup3d 43074 pellfund14gap 43424 sineq0ALT 45472 icccncfext 46421 ltnltne 47853 iccpartnel 48004 nprmmul3 48095 odz2prm2pw 48132 evenltle 48299 gbowge7 48345 bgoldbtbndlem1 48387 elfzolborelfzop1 49101 |
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