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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 8411 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 → ¬ 𝐵 < 𝐴)) | |
| 2 | lenlt 8401 | . 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 8178 < clt 8360 ≤ cle 8361 |
| 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 8270 ax-resscn 8271 ax-pre-ltirr 8291 ax-pre-lttrn 8293 |
| 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 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 |
| This theorem is used by: ltlei 8428 ltled 8446 ltleap 8962 lep1 9177 lem1 9179 letrp1 9180 ltmul12a 9192 bndndx 9566 nn0ge0 9592 zletric 9692 zlelttric 9693 zltnle 9694 zleloe 9695 ltsubnn0 9716 zdcle 9725 uzind 9761 fnn0ind 9766 eluz2b2 10012 rpge0 10077 zltaddlt1le 10420 difelfznle 10552 elfzouz2 10579 elfzo0le 10607 fzosplitprm1 10663 fzostep1 10666 qletric 10686 qlelttric 10687 qltnle 10688 expgt1 11027 expnlbnd2 11116 faclbnd 11193 swrdsbslen 11452 swrdspsleq 11453 pfxccat3 11520 swrdccat 11521 caucvgrelemcau 11760 resqrexlemdecn 11792 mulcn2 12094 efcllemp 12441 sin01bnd 12540 cos01bnd 12541 sin01gt0 12545 cos01gt0 12546 absef 12553 efieq1re 12555 nn0o 12690 pythagtriplem12 13074 pythagtriplem13 13075 pythagtriplem14 13076 pythagtriplem16 13078 pclemub 13086 ballotfilemfrceq 13321 sincosq1lem 15976 tangtx 15989 |
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