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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 8371 | . 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 8178 ℝ*cxr 8359 |
| 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 8364 |
| This theorem is used by: 1xr 8384 cos12dec 12537 halfleoddlt 12663 reeff1oleme 15875 reeff1o 15876 sin0pilem2 15886 neghalfpirx 15898 sincosq1sgn 15930 sincosq2sgn 15931 sincosq4sgn 15933 sinq12gt0 15934 cosq14gt0 15936 cosq23lt0 15937 coseq0q4123 15938 coseq00topi 15939 coseq0negpitopi 15940 cosordlem 15953 cosq34lt1 15954 cos02pilt1 15955 cos0pilt1 15956 ioocosf1o 15958 negpitopissre 15959 iooref1o 17095 taupi 17135 |
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