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Mirrors > Home > ILE Home > Th. List > 0xr | Unicode version |
Description: Zero is an extended real. (Contributed by Mario Carneiro, 15-Jun-2014.) |
Ref | Expression |
---|---|
0xr |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ressxr 7069 | . 2 | |
2 | 0re 7027 | . 2 | |
3 | 1, 2 | sselii 2942 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1393 cr 6888 cc0 6889 cxr 7059 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-1re 6978 ax-addrcl 6981 ax-rnegex 6993 |
This theorem depends on definitions: df-bi 110 df-tru 1246 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-xr 7064 |
This theorem is referenced by: 0lepnf 8711 ge0gtmnf 8736 xlt0neg1 8751 xlt0neg2 8752 xle0neg1 8753 xle0neg2 8754 ioopos 8819 elxrge0 8847 0e0iccpnf 8849 |
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