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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 8372 | . 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 8179 ℝ*cxr 8360 |
| 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 8365 |
| This theorem is used by: 1xr 8385 cos12dec 12553 halfleoddlt 12679 reeff1oleme 15925 reeff1o 15926 sin0pilem2 15936 neghalfpirx 15948 sincosq1sgn 15980 sincosq2sgn 15981 sincosq4sgn 15983 sinq12gt0 15984 cosq14gt0 15986 cosq23lt0 15987 coseq0q4123 15988 coseq00topi 15989 coseq0negpitopi 15990 cosordlem 16003 cosq34lt1 16004 cos02pilt1 16005 cos0pilt1 16006 ioocosf1o 16008 negpitopissre 16009 iooref1o 17205 taupi 17245 |
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