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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 8391 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 105 ∈ wcel 2209 class class class wbr 4125 ℝcr 8168 < clt 8350 ≤ cle 8351 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-br 4126 df-opab 4188 df-xp 4775 df-cnv 4777 df-xr 8354 df-le 8356 |
| This theorem is referenced by: ltnsymd 8436 nltled 8437 lensymd 8438 leadd1 8748 lemul1 8911 leltap 8943 ap0gt0 8958 prodgt0 9172 prodge0 9174 lediv1 9189 lemuldiv 9201 lerec 9204 lt2msq 9206 le2msq 9221 squeeze0 9224 suprleubex 9274 0mnnnnn0 9574 elnn0z 9636 uzm1 9932 infregelbex 9977 fztri3or 10422 fzdisj 10435 uzdisj 10478 nn0disj 10523 fzouzdisj 10567 elfzonelfzo 10626 qdcle 10659 flqeqceilz 10733 modifeq2int 10801 modsumfzodifsn 10811 nn0leexp2 11126 expcanlem 11131 fimaxq 11248 hashf1 11265 swrdccatin2 11479 resqrexlemoverl 11765 leabs 11818 absle 11833 maxleast 11957 minmax 11974 climge0 12069 pcfac 13107 cxple 15942 gausslemma2dlem1a 16091 |
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