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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 8255 | . 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 8031 < clt 8214 ≤ cle 8215 |
| 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 8218 df-le 8220 |
| This theorem is referenced by: ltnsymd 8299 nltled 8300 lensymd 8301 leadd1 8610 lemul1 8773 leltap 8805 ap0gt0 8820 prodgt0 9032 prodge0 9034 lediv1 9049 lemuldiv 9061 lerec 9064 lt2msq 9066 le2msq 9081 squeeze0 9084 suprleubex 9134 0mnnnnn0 9434 elnn0z 9492 uzm1 9787 infregelbex 9832 fztri3or 10274 fzdisj 10287 uzdisj 10328 nn0disj 10373 fzouzdisj 10417 elfzonelfzo 10476 qdcle 10507 flqeqceilz 10581 modifeq2int 10649 modsumfzodifsn 10659 nn0leexp2 10973 expcanlem 10978 fimaxq 11092 swrdccatin2 11314 resqrexlemoverl 11586 leabs 11639 absle 11654 maxleast 11778 minmax 11795 climge0 11890 pcfac 12928 gsumfzz 13583 cxple 15647 gausslemma2dlem1a 15793 |
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