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| Mirrors > Home > ILE Home > Th. List > 0xr | Unicode version | ||
| Description: Zero is an extended real. (Contributed by Mario Carneiro, 15-Jun-2014.) |
| Ref | Expression |
|---|---|
| 0xr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressxr 8190 |
. 2
| |
| 2 | 0re 8146 |
. 2
| |
| 3 | 1, 2 | sselii 3221 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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 8093 ax-addrcl 8096 ax-rnegex 8108 |
| 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 8185 |
| This theorem is referenced by: 0lepnf 9986 ge0gtmnf 10019 xlt0neg1 10034 xlt0neg2 10035 xle0neg1 10036 xle0neg2 10037 xaddf 10040 xaddval 10041 xaddid1 10058 xaddid2 10059 xnn0xadd0 10063 xaddge0 10074 xsubge0 10077 xposdif 10078 ioopos 10146 elxrge0 10174 0e0iccpnf 10176 dfrp2 10483 xrmaxadd 11772 xrminrpcl 11785 xrbdtri 11787 fprodge0 12148 ef01bndlem 12267 sin01bnd 12268 cos01bnd 12269 cos1bnd 12270 sinltxirr 12272 sin01gt0 12273 cos01gt0 12274 sin02gt0 12275 sincos1sgn 12276 sincos2sgn 12277 cos12dec 12279 halfleoddlt 12405 psmetge0 15005 isxmet2d 15022 xmetge0 15039 blgt0 15076 xblss2ps 15078 xblss2 15079 xblm 15091 bdxmet 15175 bdmet 15176 bdmopn 15178 xmetxp 15181 cnblcld 15209 blssioo 15227 reeff1oleme 15446 reeff1o 15447 sin0pilem1 15455 sin0pilem2 15456 pilem3 15457 sinhalfpilem 15465 sincosq1lem 15499 sincosq1sgn 15500 sincosq2sgn 15501 sinq12gt0 15504 cosq14gt0 15506 tangtx 15512 sincos4thpi 15514 pigt3 15518 cosordlem 15523 cosq34lt1 15524 cos02pilt1 15525 cos0pilt1 15526 iooref1o 16402 taupi 16441 |
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