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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 8148 | . 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 2176 class class class wbr 4044 ℝcr 7924 < clt 8107 ≤ cle 8108 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-14 2179 ax-ext 2187 ax-sep 4162 ax-pow 4218 ax-pr 4253 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-eu 2057 df-mo 2058 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 df-rex 2490 df-v 2774 df-dif 3168 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-br 4045 df-opab 4106 df-xp 4681 df-cnv 4683 df-xr 8111 df-le 8113 |
| This theorem is referenced by: ltnsymd 8192 nltled 8193 lensymd 8194 leadd1 8503 lemul1 8666 leltap 8698 ap0gt0 8713 prodgt0 8925 prodge0 8927 lediv1 8942 lemuldiv 8954 lerec 8957 lt2msq 8959 le2msq 8974 squeeze0 8977 suprleubex 9027 0mnnnnn0 9327 elnn0z 9385 uzm1 9679 infregelbex 9719 fztri3or 10161 fzdisj 10174 uzdisj 10215 nn0disj 10260 fzouzdisj 10304 elfzonelfzo 10359 qdcle 10389 flqeqceilz 10463 modifeq2int 10531 modsumfzodifsn 10541 nn0leexp2 10855 expcanlem 10860 fimaxq 10972 resqrexlemoverl 11332 leabs 11385 absle 11400 maxleast 11524 minmax 11541 climge0 11636 pcfac 12673 gsumfzz 13327 cxple 15389 gausslemma2dlem1a 15535 |
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