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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 8216 | . 2 ⊢ ℝ ⊆ ℝ* | |
| 2 | 0re 8172 | . 2 ⊢ 0 ∈ ℝ | |
| 3 | 1, 2 | sselii 3222 | 1 ⊢ 0 ∈ ℝ* |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 ℝcr 8024 0cc0 8025 ℝ*cxr 8206 |
| 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 8119 ax-addrcl 8122 ax-rnegex 8134 |
| 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 2802 df-un 3202 df-in 3204 df-ss 3211 df-xr 8211 |
| This theorem is referenced by: 0lepnf 10018 ge0gtmnf 10051 xlt0neg1 10066 xlt0neg2 10067 xle0neg1 10068 xle0neg2 10069 xaddf 10072 xaddval 10073 xaddid1 10090 xaddid2 10091 xnn0xadd0 10095 xaddge0 10106 xsubge0 10109 xposdif 10110 ioopos 10178 elxrge0 10206 0e0iccpnf 10208 dfrp2 10516 xrmaxadd 11815 xrminrpcl 11828 xrbdtri 11830 fprodge0 12191 ef01bndlem 12310 sin01bnd 12311 cos01bnd 12312 cos1bnd 12313 sinltxirr 12315 sin01gt0 12316 cos01gt0 12317 sin02gt0 12318 sincos1sgn 12319 sincos2sgn 12320 cos12dec 12322 halfleoddlt 12448 psmetge0 15048 isxmet2d 15065 xmetge0 15082 blgt0 15119 xblss2ps 15121 xblss2 15122 xblm 15134 bdxmet 15218 bdmet 15219 bdmopn 15221 xmetxp 15224 cnblcld 15252 blssioo 15270 reeff1oleme 15489 reeff1o 15490 sin0pilem1 15498 sin0pilem2 15499 pilem3 15500 sinhalfpilem 15508 sincosq1lem 15542 sincosq1sgn 15543 sincosq2sgn 15544 sinq12gt0 15547 cosq14gt0 15549 tangtx 15555 sincos4thpi 15557 pigt3 15561 cosordlem 15566 cosq34lt1 15567 cos02pilt1 15568 cos0pilt1 15569 iooref1o 16588 taupi 16627 |
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