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| Mirrors > Home > ILE Home > Th. List > rexri | GIF version | ||
| Description: A standard real is an extended real (inference form.) (Contributed by David Moews, 28-Feb-2017.) |
| Ref | Expression |
|---|---|
| rexri.1 | ⊢ 𝐴 ∈ ℝ |
| Ref | Expression |
|---|---|
| rexri | ⊢ 𝐴 ∈ ℝ* |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexri.1 | . 2 ⊢ 𝐴 ∈ ℝ | |
| 2 | rexr 8138 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐴 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2177 ℝcr 7944 ℝ*cxr 8126 |
| 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-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2188 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-v 2775 df-un 3174 df-in 3176 df-ss 3183 df-xr 8131 |
| This theorem is referenced by: 1xr 8151 cos12dec 12154 halfleoddlt 12280 reeff1oleme 15319 reeff1o 15320 sin0pilem2 15329 neghalfpirx 15341 sincosq1sgn 15373 sincosq2sgn 15374 sincosq4sgn 15376 sinq12gt0 15377 cosq14gt0 15379 cosq23lt0 15380 coseq0q4123 15381 coseq00topi 15382 coseq0negpitopi 15383 cosordlem 15396 cosq34lt1 15397 cos02pilt1 15398 cos0pilt1 15399 ioocosf1o 15401 negpitopissre 15402 iooref1o 16114 taupi 16153 |
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