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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 8370 |
. 2
| |
| 2 | 0re 8327 |
. 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 8274 ax-addrcl 8277 ax-rnegex 8289 |
| 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 8365 |
| This theorem is used by: 0lepnf 10203 ge0gtmnf 10236 xlt0neg1 10251 xlt0neg2 10252 xle0neg1 10253 xle0neg2 10254 xaddf 10257 xaddval 10258 xaddid1 10275 xaddid2 10276 xnn0xadd0 10280 xaddge0 10291 xsubge0 10294 xposdif 10295 ioopos 10363 elxrge0 10391 0e0iccpnf 10393 dfrp2 10709 xrmaxadd 12046 xrminrpcl 12059 xrbdtri 12061 fprodge0 12423 ef01bndlem 12542 sin01bnd 12543 cos01bnd 12544 cos1bnd 12545 sinltxirr 12547 sin01gt0 12548 cos01gt0 12549 sin02gt0 12550 sincos1sgn 12551 sincos2sgn 12552 cos12dec 12554 halfleoddlt 12680 psmetge0 15523 isxmet2d 15540 xmetge0 15557 blgt0 15594 xblss2ps 15596 xblss2 15597 xblm 15609 bdxmet 15693 bdmet 15694 bdmopn 15696 xmetxp 15699 cnblcld 15727 blssioo 15745 reeff1oleme 15964 reeff1o 15965 sin0pilem1 15974 sin0pilem2 15975 pilem3 15976 sinhalfpilem 15984 sincosq1lem 16018 sincosq1sgn 16019 sincosq2sgn 16020 sinq12gt0 16023 cosq14gt0 16025 tangtx 16031 sincos4thpi 16033 pigt3 16037 cosordlem 16042 cosq34lt1 16043 cos02pilt1 16044 cos0pilt1 16045 repiecelem 17240 repiecege0 17242 iooref1o 17249 taupi 17290 |
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