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| Mirrors > Home > ILE Home > Th. List > xrleid | GIF version | ||
| Description: 'Less than or equal to' is reflexive for extended reals. (Contributed by NM, 7-Feb-2007.) |
| Ref | Expression |
|---|---|
| xrleid | ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrltnr 10019 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ 𝐴 < 𝐴) | |
| 2 | xrlenlt 8249 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐴)) | |
| 3 | 2 | anidms 397 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐴)) |
| 4 | 1, 3 | mpbird 167 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 105 ∈ wcel 2201 class class class wbr 4089 ℝ*cxr 8218 < clt 8219 ≤ cle 8220 |
| 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-13 2203 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-pow 4266 ax-pr 4301 ax-un 4532 ax-setind 4637 ax-cnex 8128 ax-resscn 8129 ax-pre-ltirr 8149 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ne 2402 df-nel 2497 df-ral 2514 df-rex 2515 df-rab 2518 df-v 2803 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-br 4090 df-opab 4152 df-xp 4733 df-cnv 4735 df-pnf 8221 df-mnf 8222 df-xr 8223 df-ltxr 8224 df-le 8225 |
| This theorem is referenced by: xrleidd 10041 iccid 10165 ubioc1 10169 lbico1 10170 lbicc2 10224 ubicc2 10225 xrmaxifle 11829 |
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