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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 7812 | . 2 | |
2 | 0re 7769 | . 2 | |
3 | 1, 2 | sselii 3094 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 cr 7622 cc0 7623 cxr 7802 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-1re 7717 ax-addrcl 7720 ax-rnegex 7732 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-xr 7807 |
This theorem is referenced by: 0lepnf 9579 ge0gtmnf 9609 xlt0neg1 9624 xlt0neg2 9625 xle0neg1 9626 xle0neg2 9627 xaddf 9630 xaddval 9631 xaddid1 9648 xaddid2 9649 xnn0xadd0 9653 xaddge0 9664 xsubge0 9667 xposdif 9668 ioopos 9736 elxrge0 9764 0e0iccpnf 9766 xrmaxadd 11033 xrminrpcl 11046 xrbdtri 11048 ef01bndlem 11466 sin01bnd 11467 cos01bnd 11468 cos1bnd 11469 sin01gt0 11471 cos01gt0 11472 sin02gt0 11473 sincos1sgn 11474 sincos2sgn 11475 cos12dec 11477 halfleoddlt 11594 psmetge0 12503 isxmet2d 12520 xmetge0 12537 blgt0 12574 xblss2ps 12576 xblss2 12577 xblm 12589 bdxmet 12673 bdmet 12674 bdmopn 12676 xmetxp 12679 cnblcld 12707 blssioo 12717 sin0pilem1 12865 sin0pilem2 12866 pilem3 12867 sinhalfpilem 12875 sincosq1lem 12909 sincosq1sgn 12910 sincosq2sgn 12911 sinq12gt0 12914 cosq14gt0 12916 tangtx 12922 sincos4thpi 12924 pigt3 12928 cosordlem 12933 cosq34lt1 12934 cos02pilt1 12935 taupi 13242 |
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