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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 8313 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8270 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3234 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2203 ℝcr 8122 0cc0 8123 ℝ*cxr 8303 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-1re 8217 ax-addrcl 8220 ax-rnegex 8232 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2814 df-un 3214 df-in 3216 df-ss 3223 df-xr 8308 |
| This theorem is referenced by: 0lepnf 10119 ge0gtmnf 10152 xlt0neg1 10167 xlt0neg2 10168 xle0neg1 10169 xle0neg2 10170 xaddf 10173 xaddval 10174 xaddid1 10191 xaddid2 10192 xnn0xadd0 10196 xaddge0 10207 xsubge0 10210 xposdif 10211 ioopos 10279 elxrge0 10307 0e0iccpnf 10309 dfrp2 10619 xrmaxadd 11939 xrminrpcl 11952 xrbdtri 11954 fprodge0 12316 ef01bndlem 12435 sin01bnd 12436 cos01bnd 12437 cos1bnd 12438 sinltxirr 12440 sin01gt0 12441 cos01gt0 12442 sin02gt0 12443 sincos1sgn 12444 sincos2sgn 12445 cos12dec 12447 halfleoddlt 12573 psmetge0 15183 isxmet2d 15200 xmetge0 15217 blgt0 15254 xblss2ps 15256 xblss2 15257 xblm 15269 bdxmet 15353 bdmet 15354 bdmopn 15356 xmetxp 15359 cnblcld 15387 blssioo 15405 reeff1oleme 15624 reeff1o 15625 sin0pilem1 15633 sin0pilem2 15634 pilem3 15635 sinhalfpilem 15643 sincosq1lem 15677 sincosq1sgn 15678 sincosq2sgn 15679 sinq12gt0 15682 cosq14gt0 15684 tangtx 15690 sincos4thpi 15692 pigt3 15696 cosordlem 15701 cosq34lt1 15702 cos02pilt1 15703 cos0pilt1 15704 repiecelem 16796 repiecege0 16798 iooref1o 16805 taupi 16845 |
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