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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 8322 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8279 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3237 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 ℝcr 8131 0cc0 8132 ℝ*cxr 8312 |
| 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 8226 ax-addrcl 8229 ax-rnegex 8241 |
| 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 3217 df-in 3219 df-ss 3226 df-xr 8317 |
| This theorem is referenced by: 0lepnf 10129 ge0gtmnf 10162 xlt0neg1 10177 xlt0neg2 10178 xle0neg1 10179 xle0neg2 10180 xaddf 10183 xaddval 10184 xaddid1 10201 xaddid2 10202 xnn0xadd0 10206 xaddge0 10217 xsubge0 10220 xposdif 10221 ioopos 10289 elxrge0 10317 0e0iccpnf 10319 dfrp2 10630 xrmaxadd 11954 xrminrpcl 11967 xrbdtri 11969 fprodge0 12331 ef01bndlem 12450 sin01bnd 12451 cos01bnd 12452 cos1bnd 12453 sinltxirr 12455 sin01gt0 12456 cos01gt0 12457 sin02gt0 12458 sincos1sgn 12459 sincos2sgn 12460 cos12dec 12462 halfleoddlt 12588 psmetge0 15245 isxmet2d 15262 xmetge0 15279 blgt0 15316 xblss2ps 15318 xblss2 15319 xblm 15331 bdxmet 15415 bdmet 15416 bdmopn 15418 xmetxp 15421 cnblcld 15449 blssioo 15467 reeff1oleme 15686 reeff1o 15687 sin0pilem1 15695 sin0pilem2 15696 pilem3 15697 sinhalfpilem 15705 sincosq1lem 15739 sincosq1sgn 15740 sincosq2sgn 15741 sinq12gt0 15744 cosq14gt0 15746 tangtx 15752 sincos4thpi 15754 pigt3 15758 cosordlem 15763 cosq34lt1 15764 cos02pilt1 15765 cos0pilt1 15766 repiecelem 16858 repiecege0 16860 iooref1o 16867 taupi 16908 |
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