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Mirrors > Home > ILE Home > Th. List > 0xr | GIF version |
Description: Zero is an extended real. (Contributed by Mario Carneiro, 15-Jun-2014.) |
Ref | Expression |
---|---|
0xr | ⊢ 0 ∈ ℝ* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ressxr 7162 | . 2 ⊢ ℝ ⊆ ℝ* | |
2 | 0re 7119 | . 2 ⊢ 0 ∈ ℝ | |
3 | 1, 2 | sselii 2996 | 1 ⊢ 0 ∈ ℝ* |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1433 ℝcr 6980 0cc0 6981 ℝ*cxr 7152 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-1re 7070 ax-addrcl 7073 ax-rnegex 7085 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-xr 7157 |
This theorem is referenced by: 0lepnf 8865 ge0gtmnf 8890 xlt0neg1 8905 xlt0neg2 8906 xle0neg1 8907 xle0neg2 8908 ioopos 8973 elxrge0 9001 0e0iccpnf 9003 halfleoddlt 10294 |
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