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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 8333 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8290 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3239 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 ℝcr 8142 0cc0 8143 ℝ*cxr 8323 |
| 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 2216 ax-1re 8237 ax-addrcl 8240 ax-rnegex 8252 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-xr 8328 |
| This theorem is referenced by: 0lepnf 10145 ge0gtmnf 10178 xlt0neg1 10193 xlt0neg2 10194 xle0neg1 10195 xle0neg2 10196 xaddf 10199 xaddval 10200 xaddid1 10217 xaddid2 10218 xnn0xadd0 10222 xaddge0 10233 xsubge0 10236 xposdif 10237 ioopos 10305 elxrge0 10333 0e0iccpnf 10335 dfrp2 10650 xrmaxadd 11974 xrminrpcl 11987 xrbdtri 11989 fprodge0 12351 ef01bndlem 12470 sin01bnd 12471 cos01bnd 12472 cos1bnd 12473 sinltxirr 12475 sin01gt0 12476 cos01gt0 12477 sin02gt0 12478 sincos1sgn 12479 sincos2sgn 12480 cos12dec 12482 halfleoddlt 12608 psmetge0 15325 isxmet2d 15342 xmetge0 15359 blgt0 15396 xblss2ps 15398 xblss2 15399 xblm 15411 bdxmet 15495 bdmet 15496 bdmopn 15498 xmetxp 15501 cnblcld 15529 blssioo 15547 reeff1oleme 15766 reeff1o 15767 sin0pilem1 15775 sin0pilem2 15776 pilem3 15777 sinhalfpilem 15785 sincosq1lem 15819 sincosq1sgn 15820 sincosq2sgn 15821 sinq12gt0 15824 cosq14gt0 15826 tangtx 15832 sincos4thpi 15834 pigt3 15838 cosordlem 15843 cosq34lt1 15844 cos02pilt1 15845 cos0pilt1 15846 repiecelem 16948 repiecege0 16950 iooref1o 16957 taupi 16998 |
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