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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 8223 |
. 2
| |
| 2 | 0re 8179 |
. 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 8126 ax-addrcl 8129 ax-rnegex 8141 |
| 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 8218 |
| This theorem is referenced by: 0lepnf 10025 ge0gtmnf 10058 xlt0neg1 10073 xlt0neg2 10074 xle0neg1 10075 xle0neg2 10076 xaddf 10079 xaddval 10080 xaddid1 10097 xaddid2 10098 xnn0xadd0 10102 xaddge0 10113 xsubge0 10116 xposdif 10117 ioopos 10185 elxrge0 10213 0e0iccpnf 10215 dfrp2 10524 xrmaxadd 11839 xrminrpcl 11852 xrbdtri 11854 fprodge0 12216 ef01bndlem 12335 sin01bnd 12336 cos01bnd 12337 cos1bnd 12338 sinltxirr 12340 sin01gt0 12341 cos01gt0 12342 sin02gt0 12343 sincos1sgn 12344 sincos2sgn 12345 cos12dec 12347 halfleoddlt 12473 psmetge0 15074 isxmet2d 15091 xmetge0 15108 blgt0 15145 xblss2ps 15147 xblss2 15148 xblm 15160 bdxmet 15244 bdmet 15245 bdmopn 15247 xmetxp 15250 cnblcld 15278 blssioo 15296 reeff1oleme 15515 reeff1o 15516 sin0pilem1 15524 sin0pilem2 15525 pilem3 15526 sinhalfpilem 15534 sincosq1lem 15568 sincosq1sgn 15569 sincosq2sgn 15570 sinq12gt0 15573 cosq14gt0 15575 tangtx 15581 sincos4thpi 15583 pigt3 15587 cosordlem 15592 cosq34lt1 15593 cos02pilt1 15594 cos0pilt1 15595 iooref1o 16689 taupi 16729 |
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