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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 8223 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8179 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3224 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 ℝcr 8031 0cc0 8032 ℝ*cxr 8213 |
| 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 2213 ax-1re 8126 ax-addrcl 8129 ax-rnegex 8141 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-xr 8218 |
| This theorem is referenced by: 0lepnf 10025 ge0gtmnf 10058 xlt0neg1 10073 xlt0neg2 10074 xle0neg1 10075 xle0neg2 10076 xaddf 10079 xaddval 10080 xaddid1 10097 xaddid2 10098 xnn0xadd0 10102 xaddge0 10113 xsubge0 10116 xposdif 10117 ioopos 10185 elxrge0 10213 0e0iccpnf 10215 dfrp2 10524 xrmaxadd 11823 xrminrpcl 11836 xrbdtri 11838 fprodge0 12200 ef01bndlem 12319 sin01bnd 12320 cos01bnd 12321 cos1bnd 12322 sinltxirr 12324 sin01gt0 12325 cos01gt0 12326 sin02gt0 12327 sincos1sgn 12328 sincos2sgn 12329 cos12dec 12331 halfleoddlt 12457 psmetge0 15058 isxmet2d 15075 xmetge0 15092 blgt0 15129 xblss2ps 15131 xblss2 15132 xblm 15144 bdxmet 15228 bdmet 15229 bdmopn 15231 xmetxp 15234 cnblcld 15262 blssioo 15280 reeff1oleme 15499 reeff1o 15500 sin0pilem1 15508 sin0pilem2 15509 pilem3 15510 sinhalfpilem 15518 sincosq1lem 15552 sincosq1sgn 15553 sincosq2sgn 15554 sinq12gt0 15557 cosq14gt0 15559 tangtx 15565 sincos4thpi 15567 pigt3 15571 cosordlem 15576 cosq34lt1 15577 cos02pilt1 15578 cos0pilt1 15579 iooref1o 16659 taupi 16698 |
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