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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 8228 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8184 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3223 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2201 ℝcr 8036 0cc0 8037 ℝ*cxr 8218 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2212 ax-1re 8131 ax-addrcl 8134 ax-rnegex 8146 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-v 2803 df-un 3203 df-in 3205 df-ss 3212 df-xr 8223 |
| This theorem is referenced by: 0lepnf 10030 ge0gtmnf 10063 xlt0neg1 10078 xlt0neg2 10079 xle0neg1 10080 xle0neg2 10081 xaddf 10084 xaddval 10085 xaddid1 10102 xaddid2 10103 xnn0xadd0 10107 xaddge0 10118 xsubge0 10121 xposdif 10122 ioopos 10190 elxrge0 10218 0e0iccpnf 10220 dfrp2 10529 xrmaxadd 11844 xrminrpcl 11857 xrbdtri 11859 fprodge0 12221 ef01bndlem 12340 sin01bnd 12341 cos01bnd 12342 cos1bnd 12343 sinltxirr 12345 sin01gt0 12346 cos01gt0 12347 sin02gt0 12348 sincos1sgn 12349 sincos2sgn 12350 cos12dec 12352 halfleoddlt 12478 psmetge0 15084 isxmet2d 15101 xmetge0 15118 blgt0 15155 xblss2ps 15157 xblss2 15158 xblm 15170 bdxmet 15254 bdmet 15255 bdmopn 15257 xmetxp 15260 cnblcld 15288 blssioo 15306 reeff1oleme 15525 reeff1o 15526 sin0pilem1 15534 sin0pilem2 15535 pilem3 15536 sinhalfpilem 15544 sincosq1lem 15578 sincosq1sgn 15579 sincosq2sgn 15580 sinq12gt0 15583 cosq14gt0 15585 tangtx 15591 sincos4thpi 15593 pigt3 15597 cosordlem 15602 cosq34lt1 15603 cos02pilt1 15604 cos0pilt1 15605 repiecelem 16696 repiecege0 16698 iooref1o 16705 taupi 16745 |
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