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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 8378 | . 2 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐴 ∈ ℝ* |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 ℝcr 8185 ℝ*cxr 8366 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 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-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-xr 8371 |
| This theorem is used by: 1xr 8391 cos12dec 12561 halfleoddlt 12687 reeff1oleme 16010 reeff1o 16011 sin0pilem2 16021 neghalfpirx 16033 sincosq1sgn 16065 sincosq2sgn 16066 sincosq4sgn 16068 sinq12gt0 16069 cosq14gt0 16071 cosq23lt0 16072 coseq0q4123 16073 coseq00topi 16074 coseq0negpitopi 16075 cosordlem 16089 cosq34lt1 16090 cos02pilt1 16091 cos0pilt1 16092 ioocosf1o 16094 negpitopissre 16095 iooref1o 17301 taupi 17342 |
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