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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 8363 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8320 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3245 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2209 ℝcr 8172 0cc0 8173 ℝ*cxr 8353 |
| This theorem was proved from 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 ax-1re 8267 ax-addrcl 8270 ax-rnegex 8282 |
| This theorem 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-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-xr 8358 |
| This theorem is referenced by: 0lepnf 10175 ge0gtmnf 10208 xlt0neg1 10223 xlt0neg2 10224 xle0neg1 10225 xle0neg2 10226 xaddf 10229 xaddval 10230 xaddid1 10247 xaddid2 10248 xnn0xadd0 10252 xaddge0 10263 xsubge0 10266 xposdif 10267 ioopos 10335 elxrge0 10363 0e0iccpnf 10365 dfrp2 10681 xrmaxadd 12010 xrminrpcl 12023 xrbdtri 12025 fprodge0 12387 ef01bndlem 12506 sin01bnd 12507 cos01bnd 12508 cos1bnd 12509 sinltxirr 12511 sin01gt0 12512 cos01gt0 12513 sin02gt0 12514 sincos1sgn 12515 sincos2sgn 12516 cos12dec 12518 halfleoddlt 12644 psmetge0 15415 isxmet2d 15432 xmetge0 15449 blgt0 15486 xblss2ps 15488 xblss2 15489 xblm 15501 bdxmet 15585 bdmet 15586 bdmopn 15588 xmetxp 15591 cnblcld 15619 blssioo 15637 reeff1oleme 15856 reeff1o 15857 sin0pilem1 15865 sin0pilem2 15866 pilem3 15867 sinhalfpilem 15875 sincosq1lem 15909 sincosq1sgn 15910 sincosq2sgn 15911 sinq12gt0 15914 cosq14gt0 15916 tangtx 15922 sincos4thpi 15924 pigt3 15928 cosordlem 15933 cosq34lt1 15934 cos02pilt1 15935 cos0pilt1 15936 repiecelem 17048 repiecege0 17050 iooref1o 17057 taupi 17097 |
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