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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 8213 |
. 2
| |
| 2 | 0re 8169 |
. 2
| |
| 3 | 1, 2 | sselii 3222 |
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 8116 ax-addrcl 8119 ax-rnegex 8131 |
| 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 8208 |
| This theorem is referenced by: 0lepnf 10015 ge0gtmnf 10048 xlt0neg1 10063 xlt0neg2 10064 xle0neg1 10065 xle0neg2 10066 xaddf 10069 xaddval 10070 xaddid1 10087 xaddid2 10088 xnn0xadd0 10092 xaddge0 10103 xsubge0 10106 xposdif 10107 ioopos 10175 elxrge0 10203 0e0iccpnf 10205 dfrp2 10513 xrmaxadd 11812 xrminrpcl 11825 xrbdtri 11827 fprodge0 12188 ef01bndlem 12307 sin01bnd 12308 cos01bnd 12309 cos1bnd 12310 sinltxirr 12312 sin01gt0 12313 cos01gt0 12314 sin02gt0 12315 sincos1sgn 12316 sincos2sgn 12317 cos12dec 12319 halfleoddlt 12445 psmetge0 15045 isxmet2d 15062 xmetge0 15079 blgt0 15116 xblss2ps 15118 xblss2 15119 xblm 15131 bdxmet 15215 bdmet 15216 bdmopn 15218 xmetxp 15221 cnblcld 15249 blssioo 15267 reeff1oleme 15486 reeff1o 15487 sin0pilem1 15495 sin0pilem2 15496 pilem3 15497 sinhalfpilem 15505 sincosq1lem 15539 sincosq1sgn 15540 sincosq2sgn 15541 sinq12gt0 15544 cosq14gt0 15546 tangtx 15552 sincos4thpi 15554 pigt3 15558 cosordlem 15563 cosq34lt1 15564 cos02pilt1 15565 cos0pilt1 15566 iooref1o 16574 taupi 16613 |
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