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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 8359 |
. 2
| |
| 2 | 0re 8316 |
. 2
| |
| 3 | 1, 2 | sselii 3245 |
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 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 8263 ax-addrcl 8266 ax-rnegex 8278 |
| This theorem 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 8354 |
| This theorem is referenced by: 0lepnf 10171 ge0gtmnf 10204 xlt0neg1 10219 xlt0neg2 10220 xle0neg1 10221 xle0neg2 10222 xaddf 10225 xaddval 10226 xaddid1 10243 xaddid2 10244 xnn0xadd0 10248 xaddge0 10259 xsubge0 10262 xposdif 10263 ioopos 10331 elxrge0 10359 0e0iccpnf 10361 dfrp2 10676 xrmaxadd 12005 xrminrpcl 12018 xrbdtri 12020 fprodge0 12382 ef01bndlem 12501 sin01bnd 12502 cos01bnd 12503 cos1bnd 12504 sinltxirr 12506 sin01gt0 12507 cos01gt0 12508 sin02gt0 12509 sincos1sgn 12510 sincos2sgn 12511 cos12dec 12513 halfleoddlt 12639 psmetge0 15355 isxmet2d 15372 xmetge0 15389 blgt0 15426 xblss2ps 15428 xblss2 15429 xblm 15441 bdxmet 15525 bdmet 15526 bdmopn 15528 xmetxp 15531 cnblcld 15559 blssioo 15577 reeff1oleme 15796 reeff1o 15797 sin0pilem1 15805 sin0pilem2 15806 pilem3 15807 sinhalfpilem 15815 sincosq1lem 15849 sincosq1sgn 15850 sincosq2sgn 15851 sinq12gt0 15854 cosq14gt0 15856 tangtx 15862 sincos4thpi 15864 pigt3 15868 cosordlem 15873 cosq34lt1 15874 cos02pilt1 15875 cos0pilt1 15876 repiecelem 16979 repiecege0 16981 iooref1o 16988 taupi 17028 |
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