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| Mirrors > Home > ILE Home > Th. List > ltle | GIF version | ||
| Description: 'Less than' implies 'less than or equal to'. (Contributed by NM, 25-Aug-1999.) |
| Ref | Expression |
|---|---|
| ltle | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → 𝐴 ≤ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltnsym 8412 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → ¬ 𝐵 < 𝐴)) | |
| 2 | lenlt 8402 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) | |
| 3 | 1, 2 | sylibrd 169 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → 𝐴 ≤ 𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 104 ∈ wcel 2209 class class class wbr 4130 ℝcr 8179 < clt 8361 ≤ cle 8362 |
| This proof depends on 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 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8271 ax-resscn 8272 ax-pre-ltirr 8292 ax-pre-lttrn 8294 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 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-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-xp 4780 df-cnv 4782 df-pnf 8363 df-mnf 8364 df-xr 8365 df-ltxr 8366 df-le 8367 |
| This theorem is used by: ltlei 8429 ltled 8447 ltleap 8963 lep1 9178 lem1 9180 letrp1 9181 ltmul12a 9193 bndndx 9567 nn0ge0 9593 zletric 9693 zlelttric 9694 zltnle 9695 zleloe 9696 ltsubnn0 9717 zdcle 9726 uzind 9762 fnn0ind 9767 eluz2b2 10013 rpge0 10078 zltaddlt1le 10421 difelfznle 10553 elfzouz2 10580 elfzo0le 10608 fzosplitprm1 10664 fzostep1 10667 qletric 10687 qlelttric 10688 qltnle 10689 expgt1 11029 expnlbnd2 11118 faclbnd 11195 swrdsbslen 11454 swrdspsleq 11455 pfxccat3 11522 swrdccat 11523 caucvgrelemcau 11762 resqrexlemdecn 11794 mulcn2 12097 efcllemp 12444 sin01bnd 12543 cos01bnd 12544 sin01gt0 12548 cos01gt0 12549 absef 12556 efieq1re 12558 nn0o 12693 pythagtriplem12 13077 pythagtriplem13 13078 pythagtriplem14 13079 pythagtriplem16 13081 pclemub 13089 ballotfilemfrceq 13324 sincosq1lem 16018 tangtx 16031 chtqub 16257 bposlem9 16280 |
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