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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 8254 | . 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 2202 class class class wbr 4088 ℝcr 8030 < clt 8213 ≤ cle 8214 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-xp 4731 df-cnv 4733 df-xr 8217 df-le 8219 |
| This theorem is referenced by: ltnsymd 8298 nltled 8299 lensymd 8300 leadd1 8609 lemul1 8772 leltap 8804 ap0gt0 8819 prodgt0 9031 prodge0 9033 lediv1 9048 lemuldiv 9060 lerec 9063 lt2msq 9065 le2msq 9080 squeeze0 9083 suprleubex 9133 0mnnnnn0 9433 elnn0z 9491 uzm1 9786 infregelbex 9831 fztri3or 10273 fzdisj 10286 uzdisj 10327 nn0disj 10372 fzouzdisj 10416 elfzonelfzo 10474 qdcle 10505 flqeqceilz 10579 modifeq2int 10647 modsumfzodifsn 10657 nn0leexp2 10971 expcanlem 10976 fimaxq 11090 swrdccatin2 11309 resqrexlemoverl 11581 leabs 11634 absle 11649 maxleast 11773 minmax 11790 climge0 11885 pcfac 12922 gsumfzz 13577 cxple 15640 gausslemma2dlem1a 15786 |
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