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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 8375 |
. 2
| |
| 2 | 0re 8332 |
. 2
| |
| 3 | 1, 2 | sselii 3245 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-1re 8279 ax-addrcl 8282 ax-rnegex 8294 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-xr 8370 |
| This theorem is used by: 0lepnf 10209 ge0gtmnf 10242 xlt0neg1 10257 xlt0neg2 10258 xle0neg1 10259 xle0neg2 10260 xaddf 10263 xaddval 10264 xaddid1 10281 xaddid2 10282 xnn0xadd0 10286 xaddge0 10297 xsubge0 10300 xposdif 10301 ioopos 10369 elxrge0 10397 0e0iccpnf 10399 dfrp2 10715 xrmaxadd 12052 xrminrpcl 12065 xrbdtri 12067 fprodge0 12429 ef01bndlem 12548 sin01bnd 12549 cos01bnd 12550 cos1bnd 12551 sinltxirr 12553 sin01gt0 12554 cos01gt0 12555 sin02gt0 12556 sincos1sgn 12557 sincos2sgn 12558 cos12dec 12560 halfleoddlt 12686 psmetge0 15557 isxmet2d 15574 xmetge0 15591 blgt0 15628 xblss2ps 15630 xblss2 15631 xblm 15643 bdxmet 15727 bdmet 15728 bdmopn 15730 xmetxp 15733 cnblcld 15761 blssioo 15779 reeff1oleme 15998 reeff1o 15999 sin0pilem1 16008 sin0pilem2 16009 pilem3 16010 sinhalfpilem 16018 sincosq1lem 16052 sincosq1sgn 16053 sincosq2sgn 16054 sinq12gt0 16057 cosq14gt0 16059 tangtx 16065 sincos4thpi 16067 pigt3 16071 cosordlem 16077 cosq34lt1 16078 cos02pilt1 16079 cos0pilt1 16080 repiecelem 17280 repiecege0 17282 iooref1o 17289 taupi 17330 |
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