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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 11213 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 2 | axlttri 11206 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 < 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 < 𝐵))) | |
| 3 | 2 | ancoms 458 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 < 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 < 𝐵))) |
| 4 | 3 | con2bid 354 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ ¬ 𝐵 < 𝐴)) |
| 5 | eqcom 2744 | . . . . 5 ⊢ (𝐵 = 𝐴 ↔ 𝐴 = 𝐵) | |
| 6 | 5 | orbi1i 914 | . . . 4 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 = 𝐵 ∨ 𝐴 < 𝐵)) |
| 7 | orcom 871 | . . . 4 ⊢ ((𝐴 = 𝐵 ∨ 𝐴 < 𝐵) ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵)) | |
| 8 | 6, 7 | bitri 275 | . . 3 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵)) |
| 9 | 4, 8 | bitr3di 286 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (¬ 𝐵 < 𝐴 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| 10 | 1, 9 | bitrd 279 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ (𝐴 < 𝐵 ∨ 𝐴 = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 = wceq 1542 ∈ wcel 2114 class class class wbr 5086 ℝcr 11026 < clt 11168 ≤ cle 11169 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 ax-resscn 11084 ax-pre-lttri 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 |
| This theorem is referenced by: ltle 11223 leltne 11224 lelttr 11225 ltletr 11227 letr 11229 leid 11231 ltlen 11236 leloei 11252 leloed 11278 lemul1 11996 lemul1a 11998 squeeze0 12048 sup3 12102 nn0ge0 12451 nn0sub 12476 elnn0z 12526 xlemul1a 13229 modfzo0difsn 13894 om2uzlti 13901 om2uzlt2i 13902 sqlecan 14160 discr 14191 facdiv 14238 facwordi 14240 resqrex 15201 sqrt2irr 16205 lcmf 16591 ge2nprmge4 16660 efgsfo 19703 efgred 19712 itg2mulc 25723 itgabs 25811 dgrlt 26243 sinq12ge0 26488 sineq0 26504 cxpge0 26663 cxplea 26676 cxple2 26677 cxple2a 26679 cxpcn3lem 26728 cxpcn3 26729 cxpaddlelem 26732 cxpaddle 26733 ang180lem3 26792 atanlogaddlem 26894 rlimcnp2 26947 jensen 26970 amgm 26972 htthlem 31008 hiidge0 31189 staddi 32337 stadd3i 32339 2exple2exp 32938 poimirlem28 37980 itgaddnclem2 38011 itgabsnc 38021 sn-sup3d 42948 pellfund14gap 43330 sineq0ALT 45378 icccncfext 46330 ltnltne 47744 iccpartnel 47895 nprmmul3 47986 odz2prm2pw 48023 evenltle 48190 gbowge7 48236 bgoldbtbndlem1 48278 elfzolborelfzop1 48992 |
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