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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 11191 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 2 | axlttri 11184 | . . . . 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 2738 | . . . . 5 ⊢ (𝐵 = 𝐴 ↔ 𝐴 = 𝐵) | |
| 6 | 5 | orbi1i 913 | . . . 4 ⊢ ((𝐵 = 𝐴 ∨ 𝐴 < 𝐵) ↔ (𝐴 = 𝐵 ∨ 𝐴 < 𝐵)) |
| 7 | orcom 870 | . . . 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 847 = wceq 1541 ∈ wcel 2111 class class class wbr 5091 ℝcr 11005 < clt 11146 ≤ cle 11147 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 ax-resscn 11063 ax-pre-lttri 11080 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-mpt 5173 df-id 5511 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 |
| This theorem is referenced by: ltle 11201 leltne 11202 lelttr 11203 ltletr 11205 letr 11207 leid 11209 ltlen 11214 leloei 11230 leloed 11256 lemul1 11973 lemul1a 11975 squeeze0 12025 sup3 12079 nn0ge0 12406 nn0sub 12431 elnn0z 12481 xlemul1a 13187 modfzo0difsn 13850 om2uzlti 13857 om2uzlt2i 13858 sqlecan 14116 discr 14147 facdiv 14194 facwordi 14196 resqrex 15157 sqrt2irr 16158 lcmf 16544 ge2nprmge4 16612 efgsfo 19652 efgred 19661 itg2mulc 25676 itgabs 25764 dgrlt 26200 sinq12ge0 26445 sineq0 26461 cxpge0 26620 cxplea 26633 cxple2 26634 cxple2a 26636 cxpcn3lem 26685 cxpcn3 26686 cxpaddlelem 26689 cxpaddle 26690 ang180lem3 26749 atanlogaddlem 26851 rlimcnp2 26904 jensen 26927 amgm 26929 htthlem 30895 hiidge0 31076 staddi 32224 stadd3i 32226 2exple2exp 32826 poimirlem28 37694 itgaddnclem2 37725 itgabsnc 37735 sn-sup3d 42531 pellfund14gap 42926 sineq0ALT 44975 icccncfext 45931 ltnltne 47336 iccpartnel 47475 odz2prm2pw 47600 evenltle 47754 gbowge7 47800 bgoldbtbndlem1 47842 elfzolborelfzop1 48557 |
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