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| Mirrors > Home > ILE Home > Th. List > lenltd | GIF version | ||
| Description: 'Less than or equal to' in terms of 'less than'. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| ltd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| ltd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| Ref | Expression |
|---|---|
| lenltd | ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | ltd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | lenlt 8233 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 105 ∈ wcel 2200 class class class wbr 4083 ℝcr 8009 < clt 8192 ≤ cle 8193 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-br 4084 df-opab 4146 df-xp 4725 df-cnv 4727 df-xr 8196 df-le 8198 |
| This theorem is referenced by: ltnsymd 8277 nltled 8278 lensymd 8279 leadd1 8588 lemul1 8751 leltap 8783 ap0gt0 8798 prodgt0 9010 prodge0 9012 lediv1 9027 lemuldiv 9039 lerec 9042 lt2msq 9044 le2msq 9059 squeeze0 9062 suprleubex 9112 0mnnnnn0 9412 elnn0z 9470 uzm1 9765 infregelbex 9805 fztri3or 10247 fzdisj 10260 uzdisj 10301 nn0disj 10346 fzouzdisj 10390 elfzonelfzo 10448 qdcle 10478 flqeqceilz 10552 modifeq2int 10620 modsumfzodifsn 10630 nn0leexp2 10944 expcanlem 10949 fimaxq 11062 swrdccatin2 11276 resqrexlemoverl 11547 leabs 11600 absle 11615 maxleast 11739 minmax 11756 climge0 11851 pcfac 12888 gsumfzz 13543 cxple 15606 gausslemma2dlem1a 15752 |
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