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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 8222 |
. 2
| |
| 2 | 0re 8178 |
. 2
| |
| 3 | 1, 2 | sselii 3224 |
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 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 8125 ax-addrcl 8128 ax-rnegex 8140 |
| 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 8217 |
| This theorem is referenced by: 0lepnf 10024 ge0gtmnf 10057 xlt0neg1 10072 xlt0neg2 10073 xle0neg1 10074 xle0neg2 10075 xaddf 10078 xaddval 10079 xaddid1 10096 xaddid2 10097 xnn0xadd0 10101 xaddge0 10112 xsubge0 10115 xposdif 10116 ioopos 10184 elxrge0 10212 0e0iccpnf 10214 dfrp2 10522 xrmaxadd 11821 xrminrpcl 11834 xrbdtri 11836 fprodge0 12197 ef01bndlem 12316 sin01bnd 12317 cos01bnd 12318 cos1bnd 12319 sinltxirr 12321 sin01gt0 12322 cos01gt0 12323 sin02gt0 12324 sincos1sgn 12325 sincos2sgn 12326 cos12dec 12328 halfleoddlt 12454 psmetge0 15054 isxmet2d 15071 xmetge0 15088 blgt0 15125 xblss2ps 15127 xblss2 15128 xblm 15140 bdxmet 15224 bdmet 15225 bdmopn 15227 xmetxp 15230 cnblcld 15258 blssioo 15276 reeff1oleme 15495 reeff1o 15496 sin0pilem1 15504 sin0pilem2 15505 pilem3 15506 sinhalfpilem 15514 sincosq1lem 15548 sincosq1sgn 15549 sincosq2sgn 15550 sinq12gt0 15553 cosq14gt0 15555 tangtx 15561 sincos4thpi 15563 pigt3 15567 cosordlem 15572 cosq34lt1 15573 cos02pilt1 15574 cos0pilt1 15575 iooref1o 16638 taupi 16677 |
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