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| Mirrors > Home > MPE Home > Th. List > xrnltled | Structured version Visualization version GIF version | ||
| Description: "Not less than" implies "less than or equal to". (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| xrnltled.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| xrnltled.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| xrnltled.3 | ⊢ (𝜑 → ¬ 𝐵 < 𝐴) |
| Ref | Expression |
|---|---|
| xrnltled | ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrnltled.3 | . 2 ⊢ (𝜑 → ¬ 𝐵 < 𝐴) | |
| 2 | xrnltled.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 3 | xrnltled.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ*) | |
| 4 | 2, 3 | xrlenltd 11321 | . 2 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)) |
| 5 | 1, 4 | mpbird 260 | 1 ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∈ wcel 2145 class class class wbr 5103 ℝ*cxr 11288 < clt 11289 ≤ cle 11290 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-sep 5251 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-xp 5661 df-cnv 5663 df-le 11295 |
| This theorem is used by: supxrub 13398 infxrlb 13409 ixxub 13441 ixxlb 13442 supicclub2 13579 radcnvle 26685 xrge0infssd 33261 infxrge0lb 33264 pimxrneun 46330 liminflbuz2 46657 icccncfext 46729 |
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