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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 8206 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8162 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3221 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 ℝcr 8014 0cc0 8015 ℝ*cxr 8196 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-1re 8109 ax-addrcl 8112 ax-rnegex 8124 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-xr 8201 |
| This theorem is referenced by: 0lepnf 10003 ge0gtmnf 10036 xlt0neg1 10051 xlt0neg2 10052 xle0neg1 10053 xle0neg2 10054 xaddf 10057 xaddval 10058 xaddid1 10075 xaddid2 10076 xnn0xadd0 10080 xaddge0 10091 xsubge0 10094 xposdif 10095 ioopos 10163 elxrge0 10191 0e0iccpnf 10193 dfrp2 10500 xrmaxadd 11793 xrminrpcl 11806 xrbdtri 11808 fprodge0 12169 ef01bndlem 12288 sin01bnd 12289 cos01bnd 12290 cos1bnd 12291 sinltxirr 12293 sin01gt0 12294 cos01gt0 12295 sin02gt0 12296 sincos1sgn 12297 sincos2sgn 12298 cos12dec 12300 halfleoddlt 12426 psmetge0 15026 isxmet2d 15043 xmetge0 15060 blgt0 15097 xblss2ps 15099 xblss2 15100 xblm 15112 bdxmet 15196 bdmet 15197 bdmopn 15199 xmetxp 15202 cnblcld 15230 blssioo 15248 reeff1oleme 15467 reeff1o 15468 sin0pilem1 15476 sin0pilem2 15477 pilem3 15478 sinhalfpilem 15486 sincosq1lem 15520 sincosq1sgn 15521 sincosq2sgn 15522 sinq12gt0 15525 cosq14gt0 15527 tangtx 15533 sincos4thpi 15535 pigt3 15539 cosordlem 15544 cosq34lt1 15545 cos02pilt1 15546 cos0pilt1 15547 iooref1o 16516 taupi 16555 |
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