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| Mirrors > Home > ILE Home > Th. List > ltnsymd | GIF version | ||
| Description: 'Less than' implies 'less than or equal to'. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| ltd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| ltd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| ltled.1 | ⊢ (𝜑 → 𝐴 < 𝐵) |
| Ref | Expression |
|---|---|
| ltnsymd | ⊢ (𝜑 → ¬ 𝐵 < 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | ltd.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | ltled.1 | . . 3 ⊢ (𝜑 → 𝐴 < 𝐵) | |
| 4 | 1, 2, 3 | ltled 8435 | . 2 ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| 5 | 1, 2 | lenltd 8434 | . 2 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| 6 | 4, 5 | mpbid 147 | 1 ⊢ (𝜑 → ¬ 𝐵 < 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∈ 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 ax-un 4573 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 ax-pre-ltirr 8281 ax-pre-lttrn 8283 |
| This theorem 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 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-br 4126 df-opab 4188 df-xp 4775 df-cnv 4777 df-pnf 8352 df-mnf 8353 df-xr 8354 df-ltxr 8355 df-le 8356 |
| This theorem is referenced by: frec2uzlt2d 10819 resqrexlemgt0 11764 resqrexlemoverl 11765 cvgratz 12277 ivthinclemuopn 15662 ivthinclemdisj 15664 cnplimclemle 15692 efltlemlt 15798 |
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